vol.

32 issue 1
Journal of Cosmetic Dentistry

Building with Control

Sean Park, MDC

2 Big Hitters
in Principles & Lessons
Chiche and KoisAACD Toronto

The Power of...

Emotional Digital Design
Bichacho and Coachman

Spring 2016
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 A PEER-REVIEWED PUBLICATION OF THE
AMERICAN ACADEMY OF COSMETIC DENTISTRY

EDITORIAL REVIEW BOARD

Pinhas Adar, MDT, CDT, Atlanta, GA
vol. 32 issue 1 Irfan Ahmad, BDS, Middlesex, United Kingdom

Journal of Cosmetic Dentistry Gary Alex, DMD, AAACD, Huntington, NY

Edward P. Allen, DDS, PhD, Dallas, TX
Chad J. Anderson, DMD, MS, Fresno, CA
EDITOR-IN-CHIEF Edward Lowe, DMD, AAACD Elizabeth M. Bakeman, DDS, FAACD, Grand Rapids, MI
Vancouver, BC, Canada, edwardl@aacd.com Lee Ann Brady, DMD, Glendale, AZ
EXECUTIVE DIRECTOR Barbara J. Kachelski, MBA, CAE, barbk@aacd.com Ricardo M. Carvalho, DDS, PhD, Vancouver, BC, Canada
MANAGING EDITOR Tracy Skenandore, tracys@aacd.com Christian Coachman, DDS, CDT, So Paulo, Brazil
John C. Cranham, DDS, Chesapeake, VA
EDITORIAL ASSISTANT Denise Sheriff, denises@aacd.com
Michael W. Davis, DDS, Santa Fe, NM
ART DIRECTOR/DESIGNER Lynnette Rogers, lynnetter@aacd.com
Gerald E. Denehy, DDS, Iowa City, IA
GRAPHIC DESIGNER Sherry Misener, sherrym@aacd.com Newton Fahl Jr., DDS, MS, Curitiba-PR, Brazil
EDITORIAL CONSULTANT Juliette Kurtz, publications@aacd.com Jonathan L. Ferencz, DDS, FACP, New York, NY

MANUSCRIPT Scott W. Finlay, DDS, FAACD, Arnold, MD

DEVELOPMENT LIAISON Allison DiMatteo, MPS, allison@cremedellacreme.org Hugh D. Flax, DDS, AAACD, Atlanta, GA
David A. Garber, DMD, Atlanta, GA
CHIEF MARKETING OFFICER Michael DiFrisco, michaeld@aacd.com
Ronald E. Goldstein, DDS, FACD, FICD, Atlanta, GA
Steve D. Hoofard, CDT, AAACD, Hermiston, OR
Kenneth Hovden, DDS, AAACD, Daly City, CA
CONTRIBUTING EDITORS Julie M. Gillis, DDS, AAACD, Grand Junction, CO Nelson Y. Howard, DDS, AAACD, San Marcos, CA
James H. Peyton, DDS, FAACD, Bakersfield, CA Ronald D. Jackson, DDS, FAACD, Middleburg, VA
J.A. Reynolds, DDS, AAACD, Franklin, TN Sang K. Jun, CDT, Monterey, CA
Gregory B. Wright, DDS, FAACD, Southlake, TX Michael J. Koczarski, DDS, AAACD Woodinville, WA
John C. Kois, DMD, MSD, Seattle, WA
Gerard Kugel, DMD, MS, PhD, Boston, MA
Cobi J. Landsberg, DMD, Tel Aviv, Israel
EDITORIAL MISSION
The mission of the Journal of Cosmetic Dentistry is to educate AACD members, as well as other Ryan Langer, AAACD, Eagle, ID
professionals in the field, on the art and science of cosmetic dentistry. We will endeavor to David A. Little, DDS, San Antonio, TX
do this by publishing well-researched, peer-reviewed articles accompanied by high-quality, Robert A. Lowe, DDS, Charlotte, NC
comprehensive clinical imagery. The objective is to enhance readers knowledge and skills while Robert C. Margeas, DDS, Des Moines, IA
showcasing the latest cosmetic techniques and procedures. The Journal of Cosmetic Dentistry
Frank J. Milnar, DDS, AAACD, St. Paul, MN
will strive to help readers become better clinicians, so they can offer their patients the best
and most responsibletreatment possible. Ricardo Mitrani, DDS, MSD, Mexico City, Mexico
Carlos A. Munoz, DDS, MSD, Buffalo, NY
ADVERTISING POLICY Thomas W. Nabors lll, DDS, AAACD, Nashville, TN
All advertising appearing in the Journal of Cosmetic Dentistry (jCD) is approved by the editorial W. Peter Nordland, DMD, MS, La Jolla, CA
team. Advertisements are not endorsed by the jCD or AACD. Aikaterini G. Papathanasiou, DDS, Boston, MA
Gary M. Radz, DDS, Denver, CO
AACD OFFICE Christopher D. Ramsey, DMD, AAACD, Jupiter, FL
Nelson A. Rego, CDT, AAACD, Santa Fe Springs, CA
402 West Wilson Street, Madison, WI 53703
Dwight G. Rickert, CDT, AAACD, Indianapolis, IN
800.543.9220 608.222.8583 Robert G. Ritter, DMD, Jupiter, FL
fax 608.222.9540 info@aacd.com www.aacd.com Matthew R. Roberts, CDT, AAACD, Idaho Falls, ID
Henry Salama, DMD, Atlanta, GA
Maurice A. Salama, DMD, Atlanta GA
Advertising: 800.543.9220 608.222.8583 or jeffr@aacd.com Michael R. Sesemann, DDS, FAACD, Omaha, NE
Editorial: 800.543.9220 608.222.8583 or publications@aacd.com Michael Sonick, DMD, Fairfield, CT
Rhys D. Spoor, DDS, AAACD, Seattle, WA
Thomas T. Teel, DDS, Fort Wayne, IN
Thomas F. Trinkner, DDS, AAACD, Columbia, SC
Reprints Eric Van Dooren, DDS, Antwerp, Belgium
High-quality reprints with possible customization are available for authors and advertisers. Marcos A. Vargas, DDS, Iowa City, IA
Please contact publications@aacd.com and the jCD editorial staff will work with you to get the Nondas Vlachopoulos, CDT, Athens, Greece
exact reprint you would like for your presentations, lectures, or patient literature. Dennis J. Wells, DDS, AAACD, Brentwood, TN
Barbara Warner Wojdan, CDT, AAACD, Oldsmar, FL

Journal of Cosmetic Dentistry 3

 Journal of Cosmetic Dentistry Spring 2016 Volume 32 Number 1
A peer-reviewed publication and member benefit of the AACD

Features
28 Clinical Cover Feature 108 Individualizing a Smile Makeover (CE article) v
Masterful Maneuvers v Mirela Feraru, DMD
Sean Park, MDC CEDIT Vincenzo Musella, DMD, MDT
CRE
Sebastian Ercus, DMD Nitzan Bichacho, DMD
Delfin Barquero, DDS
Johan Figueira, DDS 120 AACD Self-Instruction
Continuing Education v
54 No Dentistry is Better than
No DentistryReally? v
John C. Kois, DMD, MSD

62 From 2D to 3D v

Christian Coachman, DDS, CDT

Marcelo Alexandre Calamita, DDS
Newton Sesma, DMD, MSD, PhD

76 New Algorithm for Shade Matching v

Jerry Hu, DDS

Chu Han Wang, BSc
David Kuhns, PhD 54
88 Key Factors in Treatment Planning
for Complex Cases v
Alvaro Blasi, DDS, CDT
Gerard J. Chiche, DDS
Aram Torosian, MDC, CDT
Somkiat Aimplee, DDS, MSc
Jimmy Londono, DDS
Sergio Arias, DDS, MS

Column
8 Editors Message
In the Blink of an Eye...
Edward Lowe, DMD, AAACD 88

HAVE YOU MOVED? ARE YOU PLANNING TO? LET US KNOW!

Do you have a new address? Please help us to deliver your Journal of Cosmetic Dentistry (jCD) in a timely fashion. If you have a
new mailing address, contact: publications@aacd.com and let us know where we should deliver your copy of jCD. Thank you!

4 Spring 2016 Volume 32 Number 1

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 Journal of Cosmetic Dentistry Spring 2016 Volume 32 Number 1
A peer-reviewed publication and member benefit of the AACD

Departments
10 Behind the Cover
Building with Control v

Sean Park, MDC

12 Scientific SessionToronto 2016

Thoughts on Reducing Risk and 10
Minimizing Failures (Interview) v

John C. Kois, DMD, MSD

14 Scientific SessionToronto 2016

Views on Managing Complex Cases (Interview) v

Gerard J. Chiche, DDS

18 Accreditation Essentials
Revitalizing Discolored Anterior Restorations v

Cecilia Eichenholz Omo, DDS

25 Examiners Commentary v
The Paramount Details of Case Type IV
James H. Peyton, DDS, FAACD

26 New Fellow Member

18
27 New Accredited Members

The Journal of Cosmetic Dentistry (ISSN 1532-8910), USPS (10452), published quarterly. $200 per year (U.S.
& Canada) or $240 per year (All other countries), single issues available upon request, by the American
Academy of Cosmetic Dentistry, 402 West Wilson Street, Madison, WI 53703. 800.543.9220 OR
608.222.8583. Periodicals postage paid in Madison, WI, and additional offices.

POSTMASTER: send address changes to:

AACD Mission Statement

Journal of Cosmetic Dentistry
American Academy of Cosmetic Dentistry
The American Academy of Cosmetic Dentistry is dedicated to 402 West Wilson Street
Madison, WI 53703
advancing excellence in the art and science of
comprehensive cosmetic dentistry and encouraging the highest
Peer-reviewed articles are denoted with the following symbol: v
standards of ethical conduct and responsible patient care.
Statements of fact and opinion are the responsibility of the authors alone and do not imply an opinion
on the part of the officers of the AACD. Materials may not be reproduced without written permission.
Contents 2016 American Academy of Cosmetic Dentistry
The Journal of Cosmetic Dentistry maintains signed patient release forms for all articles featuring clinical
or other patient photography.

6 Spring 2016 Volume 32 Number 1

 New Titles from

Edited by Sillas Duarte, Jr

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The newest materials and best fabrication techniques for esthetic restorative results
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Bruguera, John O. Burgess, Paulo Fernando Mesquita de Carvalho, Winston Chee, Gerard
Chiche, Stephen J. Chu, Victor Clavijo, Willy Clavijo, Florin Cofar, Sillas Duarte, Cyril Gaillard,
Jack Goldberg, Jon Gurrea, Christophe Hue, Sung Bin Im, Sascha A. Jovanovic, Tae Hyung
Kim, Nathaniel Lawson, Giuseppe Mignani, Gildardo Contreras Molina, Ivan Contreras Molina,
Masayuki Okawa, Nikolaos Perakis, Jin-Ho Phark, Ioana Popp, Neimar Sartori, Cristiano Soares,
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EDITORS MESSAGE

In the Blink of an Eye...

Sitting at a table on the exhibit floor at the Pacific Dental Conference in
Vancouver, BC, I observe the traffic around me. Freshman decade dentists run
from booth to booth, attempting to procure as many free samples as possible.
Getting more education and enhancing hand skills top their agendas.
I cannot believe that I graduated from dental school 30 years ago. Back then,
the preeminent restoration was the silver mercury amalgam lined with Dycal
and Copalite varnish. Gold and porcelain metal crowns were the standard fixed
prosthodontic restorations. Dental implants were evolving and had not yet gained
mainstream acceptance. Education focused on form and function, with light
emphasis on esthetics.
Helping others When I started lecturing, one of my favorite sayings was, I do not own
excel and dentistryI am simply borrowing it for another 30 years or so before passing it
become better on to someone else. Lately I find that the number of years I am borrowing
than you is dentistry has dwindled from 30 down to 10. As I enter the senior decade of my
the true mark profession, I still feel I have much to learn.
of a teacher Appreciating our past and understanding what we face in our present is all
part of the learning interchange, and what we learn from each other at events
and mentor. like the AACD Scientific Session is awe-inspiring and advantageous for our future.
That is why this issue highlights presentations of various AACD 2016 Toronto
speakers.
As you attend this years meeting, I challenge Traditionalists and Baby
Boomers to share your wisdom. Helping others excel and become better
than you is the true mark of a teacher and mentor. Give unconditionally and
generously of your time, knowledge, and experience. It is not for you to judge
how parched for guidance the student protg is, but simply to offer up all he or
she can drink. How much is necessary to quench their thirst is ultimately their
decision.
I also challenge Generation Xers and Millennials to heed the words of one
of my favorite characters, Red Reddington, from the television drama, The
Blacklist:
People say youth is wasted on the young. I disagree. I believe wisdom is wasted
on the old. All you can do is part with it, but very few will take it, least of all the
people closest to you. They want no part of it.
Prove Reddington wrong by seeking out wisdom and modeling those who
have endured the tests and paved the pathways for you to succeed.
A colleague asked me if I am going to retire in the next few years. No way. I
spent 30 years mastering dentistry and professional communication so that now
it has never been easier or more fun. This is a great time to be practicing, so why
would I quit? Im just getting started!

Edward Lowe, DMD, AAACD

Editor-in-Chief

8 Spring 2016 Volume 32 Number 1

RT
science
 BEHIND THE COVER

Building
with Control
By Sean Park, MDC

T
he ability to fabricate lifelike restorations is essential in esthetic
dentistry. I always ask myself: How can I do better? How can
I create like nature? The desire to improve my skills led me
to study at the UCLA Center for Esthetic Dentistry. Studying there
and learning from Dr. Edward McLaren about the skeleton build-up
technique, dental photography, and communication with the dentist
changed my life as a dental technician.
The cover image for this issue of the jCD shows the dentin and
incisor frame stages of the skeleton build-up technique. I built with
Noritake EX-3 powder (Kuraray Noritake Dental; Tokyo, Japan) and
applied United Colors (Smile Line USA; Wheat Ridge, CO). The
skeleton build-up technique is invaluable because the operator can
have maximum control at every stage. Being able to fully control the
hue, value, chroma, and translucency of the restoration leads to very
predictable and successful outcomes. Most of my partner doctors are
not located in the United States, so it is crucial to have as few remakes
as possible. Therefore, it is necessary to have control, and the skeleton
build-up technique is very helpful for this.
There is so much we can learn from nature, and the best way to learn
is through photography. Taking numerous photographs of patients
and understanding their unique dental conditions and attributes in
terms of natures harmony, balance, and symmetry has greatly helped
me to improve my skills.
My excellent partner dentists and I always work as a team, sharing
our knowledge and opinions and learning from each other to provide
our patients with the most lifelike restorations possible. When a patient
shows great happiness about his or her new smile, it is incredibly
satisfying and fulfilling to me as well.
I am grateful to Dr. Johan Figueira for inspiring me to create the
cover image.

To see more about how Mr. Park employs the build-up technique, turn to
page 28.

Cover image by Sean Park, MDC. Cover image shot with a D90 Nikon
(Tokyo, Japan) and a 105-mm Sigma macro lens (Ronkonkoma, NY) set at
f/32 ISO 200 with a dual flash.

The skeleton build-up technique is

invaluable because the operator can have
maximum control at every stage.

10 Spring 2016 Volume 32 Number 1

Journal of Cosmetic Dentistry 11
 SCIENTIFIC SESSION
TORONTO
2016

Thoughts on Reducing Risk

and Minimizing Failure
An Interview with Dr. John Kois

In this interview, Dr. Kois answers questions from registrants for his course,
Modes of Failure, on Saturday, April 30, at AACD Toronto 2016. For additional
information, please turn to page 54 to read Dr. Kois article on differentiating
between tooth failure and restoration failure, and solutions to reduce risk.

12 Spring 2016 Volume 32 Number 1

 Kois

Q: If eliminating risk factors/mini- it is essential to also understand that may be more critical are based
mizing failure requires patient the minimum treatment neces- on the risk concerns of the indi-
compliance (e.g., wearing a mouth sary to achieve the objectives. This vidual patient (i.e., biofilm-based,
guard), would you take the risk? would help reduce their temptation environmentally-based or load-
Where do you draw the line? to try and sell the patient what based), which must be managed
A: We all recognize that our patients they thought the patient needed properly for a predictable outcome.
typically do not have compliance (Commodity Approach) versus Remember, even gold crowns fail
issues when our recommenda- explaining the patients problems for reasons other than the material
tions make them feel better, look (Diagnostic Approach) and provid- choice.
better (whether it is real or merely ing possible solutions critical to
perceived), or provide something improving their prognosis. For Q: Esthetic parameters should first
more convenient at a lower cost. example, if a patient presents with be analyzed and accounted for in
Therefore, compliance issues be- a large carious lesion on his lower the treatment-planning process.
come more of a problem when we first molar, my approach would be Can we predict successful clinical
do not have clear metrics to track something like, Mr. Jones, your outcomes when we change the
the value of our treatment recom- lower molar has a large hole in it occlusal environment to enhance
mendations. It is also essential that has weakened the tooth. This esthetics?
that the dentist make the correct is a result of the disease called car- A: This is an interesting question with
diagnosis rather than a subjective ies. Without treatment, it will likely many variables. The simple answer
presumption of what they think progress and infect the nerve in is yes, but it is not so simple
is happening based on signs and the tooth and you will need a root merely by correcting morphologi-
symptoms because the patient is canal treatment. In addition, if not cal concerns. There are many Class
not compliant. Then, it is critical treated, it will continue to get larger I occlusions that appear attractive
that the dentist understand that and eventually destroy the tooth. but are not functionally stable.
what they expect their patient to If the tooth is treated now, you Therefore, following the analysis of
be compliant with actually would can reduce this risk. You have two esthetic parameters, it is also criti-
minimize risk if they were compli- choices: a) a direct filling material cal that the dentist be cognizant of
ant or recognize whether or not that can seal the tooth but not pro- managing the functional physiology
the treatment protocols need to be tect it, or b) a crown that can seal (i.e., mastication, breathing, speak-
augmented. Therefore, our recom- the tooth and protect it to minimize ing, swallowing) to ensure func-
mendations that require patient the rest of the tooth cracking from tional predictability. In other words,
compliance must be a clear and biting force. just because an occlusion seems
compelling opportunity for patients viable on an articulator does not
to become advocates for their own Q: As a clinician, what failures are necessarily mean it will function in
dental health. I draw the line when commonly referred to you that the mouth. We try to optimize the
the patients behavioral compliance could be explained as an issue of esthetic outcome, but there may be
issues compromise my ability to biophysics, and how can we be functional limits imposed based on
significantly reduce their risk. more mindful of how to approach what the patient is willing to do for
those cases? correction or the reasons the teeth
Q: When you are reviewing treatment A: Dentists are capable of restoring have esthetic problems in the first
plans with your student col- teeth very well, but many times place.
leagues, what bigger picture issue are not cognizant of the modes of
do they commonly overlook? failure they are challenged by in a The Journal of Cosmetic Dentistry
A: My student colleagues most often given patient. In other words, the thanks those who submitted questions
are capable of understanding what restoration in a particular patient for this interview and Dr. Kois for tak-
is necessary for ideal treatment. might not have the expected ing the time to answer them.
However, without a risk-based outcome, based on the patients
understanding, they can tend to risk factors. Failure modes based on
overlook what acceptable compro- the restoration would be attributed
mises can be achieved to sequence merely to the skill level of the
treatment or make it more afford- dentist and the material character-
able for many patients. Therefore, istics. However, the failure modes

Journal of Cosmetic Dentistry 13

 SCIENTIFIC SESSION
TORONTO
2016

Views on Managing
Complex Cases
An Interview with Dr. Gerard Chiche

In this interview, Dr. Chiche answers questions from AACD members about his
course, Esthetic Full-Mouth Rehabilitations, on Saturday, April 30, at AACD
Toronto 2016. For additional information, please turn to page 88 to read Dr.
Chiches co-authored clinical case article addressing key factors in treatment
planning complex cases.

14 Spring 2016 Volume 32 Number 1

 Chiche

Q: What factors do you consider prior and group function is not unusual incisors. However, practicality is
to performing a complete reha- if the patient keeps a wide lateral important. If the patient requires
bilitation? In what order do you chewing pattern. a complete rehabilitation, a
address them, how, and why? small VDO alteration will provide
Q: Ensuring the longevity of adhe- tremendous room for mandibular
A The team at our Esthetics and Im- sively bonded mandibular veneers veneers with absolutely minimum
plants Center begins by examining placed to restore worn anterior tooth preparation. I prefer to call
(1) the face type (i.e., brachycephal- teeth is always a challenge. Can them low-prep as opposed to
ic), (2) size of the masseter muscles, you discuss bonding, occlusion, no-prep, because we always re-
and (3) the mandibular plane angle. and orthodontic factors that con- duce the facial line angles to some
Then we examine the amount of tribute to treatment success? degree, and if there are undercuts
attrition and erosion, and from A: This is an important topic. When with diastema and black holes,
there implement a problems list dentists first placed veneers in those areas require preparation to
and diagnostic process. Since wear the mid-1980s, we learned that optimize the path of insertion.
is a multifactorial process of which preparing mandibular incisors for One final precaution to remember
occlusion is not the only causative veneers could lead us very quickly for mandibular veneers placed in
factor, we also assess other condi- into large areas of dentin. Addition- combination with VDO increase
tions. These include regurgitation, ally, with limited space in this area, or orthodontic intrusion is that,
breathing disorders (with screening color change was not that impres- ultimately, the lower lip rules! The
as necessary using a pulse oxim- sive unless the veneers were made incisal edge length of the mandibu-
eter), and finally, for severe cases, more opaque. I also encountered lar incisors cannot exceed 3 mm
the possibility of Botox injections in numerous frustrated patients with beyond the lower lip at rest. Other-
the masseter muscles. mandibular veneers that came off, wise, mandibular esthetics compete
revealing small preparations that with maxillary esthetics, and the
The point is this: proper occlusal were mostly in dentin. I am not final result is not pleasing at all.
design is necessary, but occlusion saying that bonding to dentin does
is only one of several factors that not work, but I am cautious about Q: For medium- to high-risk patients,
should be controlled prior to pre- large areas of dentin in a veneer what role does wearing an occlusal
paring teeth. We explain this to the preparation. splint or night guard post-treat-
patients we see at our center who Researchers will tell you that dentin ment have as part of a preserva-
present with very powerful and bonds vary widely from one sample tion strategy or in reducing risk
destructive risk factors. to the next; the dentin bond figure factors?
achieved in a research study is an A: This subject is quite controversial.
Because the vast majority of reha- average number. Given individual I am only a follower in this area
bilitation patients require alteration differences, dentin bonding for one and certainly not an innovator.
of the vertical dimension of occlu- patient may be perfectly successful From my discussions at dental
sion (VDO), we put them on a splint for these veneers long term, with meetings and study groups, the
to adjust the occlusion over time no leakage or debonding, yet not consensus of the vast majority of
and achieve a stable and comfort- as successful for another patient professionals is that a carefully fab-
able restorative position. They will who experiences microleakage. ricated, classic hard occlusal splint
typically become accustomed to the Therefore, to maximize bonding, (i.e., the horseshoe type) is neces-
change. the preparation surface area should sary to protect all final ceramic
have at least 50% enamel that is restorations.
Then, during provisionalization, it is conditioned with dentin prepared I prefer a maxillary splint, since
not so much the VDO that is being very specifically; this has worked quite a few full-mouth rehabili-
tested, but rather the pathways and quite well over the years. However, tation patients have had pre-
their interference with mastication. if possible, the best strategy still restorative orthodontics. This type
In particular, it is how much canine remains bonding to 100% enamel. of splint also serves as a maxillary
guidance the patient can tolerate, For mandibular veneers, this simply retainer, while the lower incisors
or whether or not the patient would means opening the VDO slightly; are retained with bonded lingual
tolerate a more vertical chewing or, according to case specifications, wire.
pattern. Many times the canine intruding the mandibular incisors A number of practitioners typically
guidance needs to be quite shallow, or both maxillary and mandibular mention in group discussions that

Journal of Cosmetic Dentistry 15

 SCIENTIFIC SESSION
TORONTO
2016

they have been very successful minimal layering on the facial as- properly and safely. In particular,
using a simple anterior appliance pect of bicuspid restorations for an we have observed the following
that keeps the posterior teeth out esthetic transition with the canines. regarding translucent zirconia:
of occlusion. Others argue that it Their focus is also on minimally Cemented translucent zirconia
has not worked for them. layered full-arch implant-support- crowns, as opposed to bonded
It may surprise you that the major- ed zirconia restorations typically lithium disilicate, are very attrac-
ity of our rehabilitation patients fabricated using Procera Implant tive based on simplicity.
who are wearing a CPAP are actu- Bridge technology. Cementing translucent crowns, as
ally quite pleased with it. However, With equal levels of expertise in opposed to bonding them, is also
although we must be cautious with lithium disilicate and zirconia, more realistic when patients have
tongue space, we still want to pro- our team decided six months ago gingivitis and bleeding tissues on
tect our ceramic rehabilitation with to explore translucent zirconia in the day of delivery.
a thin, horseshoe maxillary splint. order to take advantage of the A good indication for translucent
materials superior strength yet zirconia crowns could be in the
Q: What is the potential of todays achieve greater translucency. To anterior region for a bruxer.
new translucent zirconia materials achieve greater translucency in zir- Translucent zirconia creates a more
for complex veneer cases? conia, it is necessary to adjust the translucent fixed partial denture
A: Our two master ceramists, Aram particle size to improve the internal (FPD) for the anterior region than
Torosian and Im Sung, graduated refraction. Simultaneously, a small traditional zirconia and maintains
from Ed McLarens UCLA advanced amount of cubic zirconia is incorpo- its strength with adequately de-
technology program and came to rated, which automatically reduces signed connectors.
our Esthetics and Implants Center material strength compared to tra- Finally, it provides a pleasing
with expertise using IPS e.max ditional zirconia. Therefore, always esthetic transition when you need
lithium disilicate. You could say understand the material you are to blend, for example, four e.max
they grew up with it, which using, and be careful with tooth crowns or veneers on the four max-
provides us with a great foundation reduction and thickness! illary incisors with a zirconia FPD
for the rehabilitations illustrated in Several products are available, but starting on the canines.
the article on page 88. our experience is with the Noritake
They have also explored monolith- Katana System, which uses three The Journal of Cosmetic Dentistry
ic zirconia in depth. We have typi- different grades of translucency thanks those who submitted questions
cally restored challenging patients and strength. Although more data for this interview and Dr. Chiche for
with IPS e.max from canine to are needed, after we delivered a taking the time to answer them.
canine, and with monolithic zirco- few cases it was evident that it is
nia on bicuspids and molars, using an attractive option when used

16 Spring 2016 Volume 32 Number 1

 ACCREDITATION ESSENTIALS

Revitalizing Discolored
Anterior Restorations
Restoring Class IV Fractures with New Composite Resin
Cecilia Eichenholz Omo, DDS

It is not desirable to place invasive

crowns on a young patient when an
anterior tooth is fractured.

Abstract
The ability to properly execute minimally invasive resto-
rations on young patients is vital. The use of composite in
such cases, requiring only a small amount of tooth reduc-
tion, is much more conservative than a crown or veneer.
This article describes the treatment of a young adult pa-
tient who presented with large discolored Class IV com-
posite restorations on her maxillary central incisors. The
teeth were restored with a new composite resin material.
Shade selection, layering techniques, and finishing and
polishing are described in detail.

Key Words: Class IV composite restorations, fractured

maxillary central incisors, minimally invasive, shade
selection, layering

Introduction
It is not desirable to place invasive crowns on a young pa-
tient when an anterior tooth is fractured. Because it is very
important to preserve these teeth as much as possible for
the rest of the patients life, the ability to properly execute
minimally invasive restorations on young patients is vi-
tal. Composite is a useful and minimally invasive solu-
tion that can be replaced over time, when necessary. A
Class IV composite is much more conservative than a
crown or veneer, requiring only a small amount of tooth
reduction.1-3

18 Spring 2016 Volume 32 Number 1

 Omo

Patient History
The patient, a 21-year-old female, presented with dis-
colored Class IV composite restorations on her maxil-
lary central incisors (#8 and #9) (Figs 1 & 2). The fill-
ings had been placed on her fractured central incisors
when she was a child and she now wanted a brighter and
more beautiful smile. Her medical health was excellent.
However, she had attention deficit disorder (ADD) and
an understanding of this was very important in treating
her dental condition. She sometimes found the necessary
adjustments and photography sessions to be time-con-
suming and challenging but she was compliant and did
her very best to accommodate the clinical situation. Her
dental health and oral hygiene were good. Her jaw was Figure 1: Preoperative frontal smile view of discolored and
uneven but that did not bother her. The occlusion was fractured central incisors.
asymptomatic and functioned well.4 Neither orthodontic
nor periodontal treatment was necessary. No temporo-
mandibular problems were noted.

Diagnosis
Teeth #8 and #9 were stained and the Class IV restora-
tions were fractured. Both teeth were asymptomatic and
showed no signs of endodontic issues. The midline was
canted and #9 was overcontoured (Figs 3 & 4).
A composite mock-up was made to help establish the
line angles, incisal edge position, symmetry, size, and
shape. The mock-up was adjusted and impressions were
taken to create a stone model. This stone model can be
further modified in wax and a stent can be made from the
putty material. Photographs were taken to evaluate the
esthetics and help plan the case. Bleaching was performed Figure 2: Postoperative frontal smile view.
several weeks prior to restoring #8 and #9.

Figure 3: Preoperative occlusal view, large Class IV fractures. Figure 4: Postoperative occlusal view.

Journal of Cosmetic Dentistry 19

 ACCREDITATION ESSENTIALS

Treatment
Shade Selection
The patient was anesthetized with local anesthetic (2%
lidocaine with 1:100,000 epinephrine). Shade matching
was done at the beginning of the appointment, before the
teeth became dehydrated. It is helpful to place the desired
composite shade on the tooth and light-cure for the best
possible shade match. Dentin and enamel shades were
selected by using a composite button technique. Dentin
buttons were placed on the cervical part of the teeth and
enamel buttons were placed as an extension of the teeth
(Fig 5). This technique is helpful in achieving an accurate
shade match and to create a polychromatic restoration.

Composite Selection
Essentia composite (GC Europe; Leuven, Belgium) was
chosen to restore the Class IV fractures on #8 and #9. Es-
sentia is based on a duo-layering concept that, according
to the manufacturers manual, aims to simplify every-
day dentistry (Fig 6).5
Figure 5: Composite shade mock-up.

Figure 6: Slide showing how to layer Essentia to achieve a polychromatic restoration. (Image reprinted with permission of GC Europe.)

Figure 7: Composite steps.

20 Spring 2016 Volume 32 Number 1

 Omo

Light Dentin (LD), a soft microhybrid composite

that can be easily sculpted with a brush, was selected
for the dentin shade. LD has higher opacity and lower
chroma value, to mimic young teeth. Light Enamel
(LE) was selected for the enamel shade. LE is a nano-
hybrid composite with a mix of ultra-fine glass fill-
ers and high-performance prepolymerized fillers for
polishability and gloss retention. Because Essentias
enamel shades are slightly stiff, they can be handled
with both brushes and carvers. The different formula-
tion of materials (micro and nanohybrids) helps to
mimic nature and light scattering. The composition
allows the use of dentin and enamel shades in the
same thicknesses that exist in the dentin and enamel
in a natural tooth (Figs 7-9). Opalescent Modifier
(OM) enamel shade was chosen to create translucen-
cy in the incisal third of the teeth.

Layering
The existing restorations were removed and moderate
beveling was done to blend the restoration into the Figure 8: Color map side view showing the thickness of each layer.
natural enamel of the teeth. A 38% phosphoric acid (Image edited and reprinted with permission of Prof. Marleen Peumans, Leuven, Belgium.)
gel (Top Dent, DAB Dental; Gothenburg, Sweden) was
used to etch the enamel. A bonding agent (All-Bond
Universal, Bisco; Schaumburg, IL) was then applied
and light-cured for 15 seconds. The palatal frame was
created using a thin layer of LE on the putty stent. A
clear mylar strip was used to create the mesial sides
with LE. The dentin shade, LD, replaced the missing
dentin and the mamelons were created with a brush.
A small amount of red-brown tint was placed on the
mamelons in a more central/apical position, which
imparts more chroma to the tooth. OM was placed in
between the mamelons incisally to achieve an opal-
escent incisal effect. A subtle white tint was placed to
enhance line angles and incisal area for higher value.
The enamel layer was restored with LE. Brushes and a
carver were used to sculpt and shape the enamel layer.
Care was taken to minimize the amount of overhang
interproximally, which reduced the amount of con-
touring and polishing necessary. All layers were light-
cured for at least 15 seconds (Figs 10-12).6,7

Dentin and enamel shades were

selected by using a composite
button technique.
Figure 9: Natural tooth side view. (Image reprinted with permission of Prof.
Marleen Peumans, Leuven, Belgium.)

Journal of Cosmetic Dentistry 21

 Finishing and Contouring
Finishing and contouring was accomplished with Sof-Lex
XT disks (3M ESPE; St. Paul, MN). The first step in the
finishing and polishing protocol is to establish the facial-
incisal line angle. The putty matrix can be used to verify
the incisal edge length and position. The next step is to
shape the mesial corners and line angles and embrasures
(red Sof-Lex XT). The buccal and lingual anatomy was
corrected with burs and a green stone. The surfaces and
angles were smoothed with progressively less abrasive
Sof-Lex XT discs (orange, orange-yellow, yellow), which
can be flexed to remove sharp angles. Green stone leaves
a velvety finish and, with a little more pressure, enhances
the buccal texture and groves. Diacomp Plus Twist pink
Figure 10: Preoperative 1:2 retracted frontal view. and white wheels (EVE Ernst Vetter GmbH; Pforzheim,
Germany) were used to obtain a higher polish. Diamond
strips (Edenta AG; Au, St. Gallen, Switzerland) with a saw
and Epitex finishing strips (GC America; Alsip, IL) were
used to contour and shape interproximally as well as to
remove subgingival overhangs. Function, articulation,
and occlusion were checked and corrected as necessary.
After the primary and secondary anatomy had been
established, a close inspection of the facial surface con-
firmed the presence of some surface characterizations.
Surface characterizations in a young patient are very com-
mon and need to be created in the final composite res-
toration to match the natural tooth structure.8,9 Using a
90- low-speed bur one time from side to side (mesial-
distal) from cervical to the incisal made the upper teeth
appear more youthful by mimicking the perikymata.
Diacomp Plus Twist pink and white wheels were used
Figure 11: The restorations were made to final contour, but were on prominent incisal-cervical surfaces and prominent
lacking high polish. parts of the buccal surface, helping the teeth to regain
shine. Gradia DiaPolisher polishing paste (GC Europe)
was used with a goat hair brush (Figs 13 & 14).

Summary
The large Class IV fractures on teeth #8 and #9 were re-
stored with a new composite resin material, Essentia. [Ed-
itors note: Essentia is not yet available in the U.S.] The
surface texture was slightly overpolished and the periky-
mata was polished away. As shown in the after images,
composite resin can be a beautiful restorative material; it
certainly was the best treatment for this patient and her
clinical situation. Both the patient and the dentist were
extremely pleased with the results. This beautiful young
woman now smiles all the time thanks to her new front
teeth.10-12 (Fig 15).

Figure 12: Restorations on #8 and #9 with a natural high polish that

blends into the natural tooth surface.

22 Spring 2016 Volume 32 Number 1

 Omo

Figure 13: Preoperative 1:1 frontal view. Figure 14: Postoperative 1:1 frontal view; line angles reestablished.

Figure 15: A smiling, happy patient.

Journal of Cosmetic Dentistry 23

References 7. Fahl N Jr. Step-by-step approaches for anterior direct restorative challenges: mastering
composite artistry to create anterior masterpiecespart 2. J Cosmetic Dent. 2011 Win-
1. Byoung SI. Principles of adhesion dentistry. A theoretical and ter;26(4):42-55.
clinical guide for dentists. Newton (PA): AEGIS; 2013.
8. Peyton JH, Arnold JF. Six or more direct resin veneers case for Accreditation: hands-on
2. American Academy of Cosmetic Dentistry (AACD). A guide to typodont exercise. J Cosmetic Dent. 2008 Fall;24(3):38-48.
Accreditation criteria. Madison (WI): AACD; 2014.
9. Peyton, James. Finishing and polishing techniques: direct composite resin restorations.
3. American Academy of Cosmetic Dentistry (AACD). Photograph- Pract Proced Aesthet Dent. 2004 May;16(4):293-8.
ic documentation and evaluation in cosmetic dentistry: a guide
to Accreditation photography. Madison (WI): AACD; 2015. 10. Hatkar P. Preserving natural tooth structure with composite resin. J Cosmetic Dent. 2010
Fall;26(3):26-36.
4. Dawson PE. Functional occlusion: from TMJ to smile design. St.
Louis: Mosby; 2006. 11. Snyder TC. Conservative replication of nature with a Class IV direct composite. J Cos-
metic Dent. 2012 Spring;28(1):22-8.
5. Peumans M, Guadix JT. Aesthetics brought back to the essentials.
Essentia from GC clinical guide. Available from: http://www. 12. Tirumalasetty PS. Layering and blending composite: conservative and esthetic restoration
gceurope.com/pid/184/manual/en_Manual.pdf of a Class IV fractured central incisor. J Cosmetic Dent. 2014 Fall;30(3):16-22. jCD

6. Fahl N Jr. A solution for everyday direct restorative challenges: Dr. Omo owns a private practice in Stockholm, Sweden.
mastering composite artistry to create anterior masterpieces
part 1. J Cosmetic Dent. 2010 Fall;26(3):56-67.

Disclosures: The author did not report any disclosures.

HIGH ACHIEVEMENT
ALWAYS TAKES
PLACE IN THE
FRAMEWORK OF
HIGH EXPECTATION

AACD Accreditation.
The place where you can achieve
your full potential.

R e s p o n s i b l e E s t h e t i c s

Visit AACD.com/firststep to get started on your Accreditation journey

AACD_HALF_PAGE_JCD.indd 1 3/1/16 4:02 PM

24 Spring 2016 Volume 32 Number 1
 Peyton

Examiners Commentary

The Paramount Details of Case Type IV

James H. Peyton, DDS, FAACD
The ability to create a
functional and cosmetic result
on a fractured anterior tooth
is paramount, especially with C ase Type IV is not just cosmetic dentistryit is functional, restorative,
and conservative dentistry at its finest. The ability to create a func-
tional and cosmetic result on a fractured anterior tooth is paramount,
a young patient. especially with a young patient. It is not in the patients best interests to
place a crown or a veneer when a composite restoration can be used. If
the dentist does not place a Class IV composite restoration when it is in-
dicated because of a lack of confidence, he or she should learn how to do
it well. The hands-on courses at the Annual AACD Scientific Sessions are
highly recommended for this; more in-depth courses can also be taken
as needed. The confidence and ability to create beautiful and functional
Class IV composite restorations will greatly benefit any restorative dentist
and, of course, their patients.1,2
Dr. Omo did a fine job of replacing discolored and fractured old com-
posite restorations. The outcome was excellent and most dentists would
find it difficult to achieve a better esthetic result with indirect restorations
(Figs 1 & 2). The examiners unanimously judged this case as worthy of
Figure 1: Preoperative view showing discolored Accreditation.
and chipped restorations on #8 and #9.
References

1. American Academy of Cosmetic Dentistry (AACD). A guide to Accreditation criteria.

Madison (WI): AACD; 2014.

2. Peyton JH. Finishing and polishing techniques: direct composite resin restorations. Pract
Proced Aesthet Dent. 2004 May;16(4)293-8.

The examiners found the following faults:

Figure 2: Postoperative view showing composite

Criterion #44: Is the surface finish, polish, and luster appropriate?
restoration blending nicely into natural tooth.
Several examiners stated that the restorations were underpolished.

Criterion #53: Is the color (hue, value, chroma) selection appropriate/

natural, not monochromatic? Several examiners stated that the restora-
tions were lower in value than natural teeth.

Dr. Peyton is an AACD Accredited Fellow and has been an AACD Accreditation Examiner since 2000.
A part-time instructor at the UCLA School of Dentistry, he practices in Bakersfield, California.

Disclosure: The author did not report any disclosures.

Journal of Cosmetic Dentistry 25

 Congratulations
to AACDs New Fellow
and New Accredited Members!
The American Academy of Cosmetic Dentistry is proud to announce that Vice
President Dwight Rickert, CDT, has become an AACD Fellow!

AACD Fellowship is the highest level of achievement recognized by the

Academy. It requires commitment and determination, and its status
connotes education and excellence. It is necessary to first become AACD
Accredited before one can attain the Fellow designation.
Well done, Mr. Rickert! Your dedication, enthusiasm, and insight are inspiring
and we wish you many more years of great success!

Dwight G. Rickert, CDT, FAACD

AACD Vice President
Indianapolis, IN

26 Spring 2016 Volume 32 Number 1

Since 1986, AACD Accreditation has provided an exceptional opportunity for dentists and laboratory technicians to enhance their
professional skills and knowledge in cosmetic and restorative dentistry. It requires these specialists to implement and demonstrate what
they have learned at a high level of proficiency.

AACD Accreditation is an honor, a sign of ones commitment to cosmetic dentistry. Often, Accredited Members say its not really about
the credential; rather, its about the learning, the professional growth, and the confidence that come from the journey along the way.

Jeffrey A. Babushkin, DDS, FICOI, AAACD George W. Childress, DMD, Per Eric Ekblom, CDT, AAACD
Trumbull, CT AAACD Stockholm, Sweden
LaGrange, GA

Deborah J. Gennero, DDS, FAGD, AAACD Nicholas C. Marongiu, DDS, AAACD

Houston, TX La Jolla, CA

Journal of Cosmetic Dentistry 27

CLINICAL COVER FEATURE

These materials enable clinicians to use

minimally invasive preparations to create
highly pleasing esthetic results.

28 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Masterful Maneuvers
Challenges in Minimally Invasive Cases with All-Ceramic Materials

Sean Park, MDC

Sebastian Ercus, DMD
Delfin Barquero, DDS
Johan Figueira, DDS

Abstract
All-ceramic materials can be a suitable choice for minimally invasive, esthetic
restorations. Duplicating the unique characteristics of natural teeth requires
the ceramists knowledge of the different all-ceramic systems available and
the skill to reproduce the desired natural-looking results. Each case has its
own key clinical requirements, making communication between the dentist
and ceramist crucial to successful outcomes. This article discusses five cases
using various all-ceramic materials to fabricate veneers and a crown. A build-
up technique is also discussed.

Key Words: all-ceramic, skeleton build-up technique, veneers, color

matching, photography, communication

Journal of Cosmetic Dentistry 29

CLINICAL COVER FEATURE

Introduction
All-ceramics are a very popular choice of material in esthetic dentistry today, espe-
cially for anterior restorations.1 These materials enable clinicians to use minimally
invasive preparations to create highly pleasing esthetic results. Natural teeth have
unique characteristics, translucency, and morphology. It is important to understand
and reproduce these elements during porcelain fabrication. Capturing all the details
of nature and transferring them to create minimally invasive restorations can be a
great challenge, requiring a dental technicians utmost technique and skill.2
Most all-ceramic materials are translucent, allowing technicians to craft more life-
like restorations. However, because of this translucency, the stump shade can affect
the final shade of the restoration. The stump shade therefore must be carefully evalu-
ated when selecting the ceramic material during treatment planning.
A thorough understanding of all-ceramic materials and choosing the right material
for each individual case are the keys to reaching the best possible esthetic result. The
dentist and the dental technician should discuss this together. This article presents
several all-ceramic cases as well as a skeleton build-up technique (Fig 1)2 that was
used to achieve high esthetics with natural-looking restorations.

Figure 1: The skeleton build-up technique during the

incisor frame stage, showing the multiple powder
colors applied.

30 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

a proper photographic protocol is still

needed to accurately communicate shade
information long distance.

Journal of Cosmetic Dentistry 31

CLINICAL COVER FEATURE

Discussion
Case 1 Perhaps future software will be able to precisely evalu-
Dentist: Sebastian Ercus, DMD ate all optical properties of the adjacent natural denti-
(Brussels, Belgium) tion without the need for a shade tab. Currently, how-
Patient: Female in her 20s ever, a proper photographic protocol is still needed to
Tooth Restored: #9 (veneer with IPS e.max, Ivo- accurately communicate shade information long dis-
clar Vivadent; Amherst, NY) tance.3 Isolating the value in image alteration software
(e.g., Photoshop CS 5) can help to analyze the retract-
Case Description ed images taken during the patients appointment.
The patient wanted to replace her discolored #9 The pictures should be taken with a black background
(Fig 2). This tooth had, in the past, been prepared by and with a polarizing filter to better analyze the trans-
another dentist for a direct composite restoration. Af- lucency in the incisal area, the characterizations, and
ter the dentist removed the composite and cleaned the the mamelon effects. Proper positioning of wireless
recurrent carious lesions present, the ultimate treat- flashes while taking the pictures is also very important
ment goal was to reproduce and match the shape and to obtain these details and gather the best data.
shade of the adjacent #8. The following are general recommendations for
taking retracted close-up images:4,5
Fabrication Details Take images at the beginning of the dental
The stump shade was very dark. A medium-opacity appointment, before the tooth has started to
ingot (MO 0, IPS e.max Press) was used to block out dehydrate. A digital single-lens reflex camera
and neutralize it. As a general rule, to correctly filter (D90, Nikon USA; Melville, NY) was used here
the light that reaches the stump, at least 0.6 mm of with a macro lens (105-mm F2.8 EX DG, Sigma;
space is needed for ceramics2 and enough space to rec- Ronkonkoma, NY). The camera was set at AP,
reate the incisal effects and mamelons present on #8. range of f 22 to f32, ISO 200, 1/60, with a SB 200
An approximately 0.5-mm thick coping was waxed-up wireless flash.
and pressed and IPS e.max Ceram porcelain was ap- The camera was positioned three inches away, two
plied using the skeleton build-up technique.2 For the inches backward with a slight camera angulation
mamelon effects stage of this technique, copy the in- of 5 to 10 degrees to avoid specular reflection.
ternal mamelon characteristics of the adjacent tooth as Photographs should be shot in RAW format and a
closely as possible. IPS e.max Ceram Mamelon Light, web-based file transfer provider should be used to
Mamelon Salmon, and A1 Dentin powders were ap- link the clinician to the dental laboratory.
plied and fired (Fig 3). Shade analysis is the key aspect when working on
The following quick Photoshop technique (Adobe single central match cases.6
Systems; San Jose, CA) was performed using a MAC It is strongly recommended to take the shade
(Apple Inc.; Cupertino, CA) to better evaluate the RAW photos without any type of flash bouncers.7
shade information: Capturing the correct shade in photographs is im-
1. Select and copy the image of the shade tab and perative to the success of each case. Even with correct
paste it on top of the tooth image. interpretation of all the above information, it is still
2. Merge all the image layers with Command + E. advisable to utilize the skills of a master ceramist who
3. After saving the image, reopen it, go to Image/Ad- can choose the right materials and emulate nature in-
justments, and select black and white to assess traorally as closely as possible (Figs 6-8).
the value of the case (Figs 4 & 5).

32 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 2: Initial presentation, badly discolored #9. Figure 3: Mamelon effects stage of skeleton build-up technique..

Figure 4: Evaluating the hue and chroma in Photoshop. Figure 5: Evaluating the value by viewing a black-and-white image in
Photoshop.

Journal of Cosmetic Dentistry 33

CLINICAL COVER FEATURE

Figure 6: One month after cementation.

Figure 7: Close-up intraoral photo of final restorations.

34 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

...the ultimate treatment goal was

to reproduce and match the shape
and shade of the adjacent #8.

Figure 8: Final smile.

Journal of Cosmetic Dentistry 35

CLINICAL COVER FEATURE

Case 2
Dentist: Delfin Barquero, DDS (San Jos, Costa
Rica)
Patient: Female in her 30s
Teeth Restored: ##6-11 (feldspathic veneers with
VITA VM 13, VITA North America; Yorba Linda, CA)

Case Description
The patient wanted a more symmetric smile; her main
desires were to close the anterior gaps and to make
#8 and #9 the same length. She wanted to keep her
original shade, which was very close to VITA 1M1 (Fig
9). After discussing the treatment plan with the den-
tist, the ceramist (primary author SP) decided to use
feldspathic veneer material and a minimally invasive
preparation of 0.2 to 0.4 mm.

Fabrication Details
An alveolar Geller model cast8 was created using a
Figure 9: Evaluating the stump shade.
refractory die technique to fabricate the feldspathic ve-
neers (Fig 10). The veneers incisal area was approxi-
mately 0.3-mm thick, which made it challenging to
reproduce all the necessary details and characteristics
(Figs 11 & 12). Due to the porcelain spaces, a minimal
amount of mamelon powders were applied on the in-
cisal third. To get the full strength of the mamelon
powders, the ceramist mixed them with stain liquid
instead of water; this will hold moisture much longer
and will provide excellent consistency. After the mam-
elon powders were fired in the oven, both internal and
external stains were applied to achieve more natural
effects. The veneers were then divested with alumi-
num oxide under 10 psi (Fig 13). A black-and-white
image shows the characterizations of the restorations Figure 10: Alveolar (Geller) cast with the refractory dies.
(Fig 14).

Figure 11: External stain for more detailed characteristics in the incisal third.

36 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 12: Divested very thin veneers (approximately 0.25 mm to 0.3 mm thick).

Figure 13: Veneers are divested and seated on the solid contact cast.

Figure 14: Black-and-white image to capture the subtle characterizations of the restorations.

Journal of Cosmetic Dentistry 37

CLINICAL COVER FEATURE

Discussion
The patients chief complaints, an asymmetric smile and uneven tooth
lengths (Fig 15), were addressed with a minimally invasive approach us-
ing 0.3 mm feldspathic veneers.9 The teeth were prepared based on a smile
design-driven prototype and the veneers were bonded to enamel, provid-
ing the best bond strength and longevity. A predictable and biomimetic
result was achieved. Minimally invasive restorations can be very challeng-
ing and require a high level of knowledge and skill from the ceramist.10
It is crucial to select the right material and to collaborate closely with the
dentist. The patient was very satisfied with her new, esthetically pleasing
smile (Figs 16 & 17).

Figure 15: Initial presentation.

Figure 16: The inserted veneers after three months.

38 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

The prototype proved to

be a valuable way for us to
communicate not only with each
other but also with the patient.

Figure 17: Postoperative, the satisfied patient.

Journal of Cosmetic Dentistry 39

CLINICAL COVER FEATURE

Case 3
Dentist: Delfin Barquero, DDS
Patient: Male in his 30s
Teeth Restored: ##7-10 (feldspathic veneers
with VITA VM 13)

Case Description
The patient, a dentist in Costa Rica, had a clear
idea of what he wanted; his main concern was to
close the diastema between the two central inci-
sors. Orthodontics was suggested but he preferred
to have restorative treatment instead. After discuss-
ing the treatment plan with the treating dentist,
the primary author selected feldspathic veneers
with minimum preparation to redesign the four
anterior teeth.

Fabrication Details
When mounting this case it was critical to get
the correct horizontal and vertical dimensions.
The primary author used the digital incisor
plane tool (McLaren; Photoshop Smile Design
DVD) to achieve this (Fig 18). Next, proper
spacing had to be established. After building
up the incisor frame (Fig 19) it was very impor-
tant to have proper space for the mamelon layer
(Fig 20) and the skin (enamel) layer. An in-
cisor putty matrix was made from the fi-
nal prototype cast to visually check the space
(Fig 21). To achieve the proper contour and to
close the diastema, the interproximal area of the
two central incisors was prepared more toward the Figure 18: Digital incisor plane image of the patient.
lingual.

40 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 19: The incisor frame stage of the skeleton build-up technique.

Figure 20: Mamelon powders are applied after the incisor frame.

Figure 21: Checking the proper enamel space visually using a putty matrix made from the
mock-up cast.

Journal of Cosmetic Dentistry 41

CLINICAL COVER FEATURE

Discussion
It is necessary to have a thorough understanding of the patients desires. In this case the patient wanted a
diastema closure (Fig 22). Although an orthodontic approach was evaluated, the patient requested veneers
but did not want us to grind down tooth structure. After a digital analysis of his smile using Photoshop
Smile Design, a prototype was used as a test drive. When Dr. Barquero accepted the case we used the
same prototype to prepare the teeth as conservatively as possible. The prototype proved to be a valuable
way for us to communicate not only with each other but also with the patient. The diastema was managed
using different dentin opacities and bonded strictly over the enamel. The patient was very satisfied with the
protocol used and with the results (Figs 23-26).

Figure 22: Diastema at initial presentation. Figure 23: One month after cementation.

Figure 24: Postoperative lateral smile.

42 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 25: Retracted postoperative smile.

Figure 26: Satisfied patient.

Journal of Cosmetic Dentistry 43

CLINICAL COVER FEATURE

Case 4
Dentist: Johan M. Figueira, DDS (Los Angeles, CA)
Patient: Female in her 20s
Teeth Restored: #7 and #10 (feldspathic veneers with Vita
VM 13); #8 (ceramic fragment)

Case Description
The patients main complaint was that her two lateral incisors
were tucked in and short. She wanted to bring them out to
the labial surface and to the same level as the central incisors.
She also wanted to fix the chipped #8. Before choosing the
proper material, a prototype was made and tried-in. The space
(approximately 0.4 to 0.5 mm) was measured from the proto-
type cast using a putty matrix (Fig 27). After communicating
with the dentist, the primary author decided to treat the patient
with a minimally invasive preparation and feldspathic material
was chosen. For longevity, it was decided to fix chipped #8 with
a fabricated porcelain fragment instead of composite filling.
The veneers were then glazed and finished (Fig 28).

Fabrication Details
The primary author always makes a custom stump shade die for
all-ceramic restorations because the materials pick up the color Figure 27: A putty matrix was fabricated from the approved
of the stump shade, especially if the restorations are thin.11 To provisionals and used to evaluate the available space for
avoid fracturing or damaging the restoration, the author made ceramic material.
a coping from the master die using Pattern Resin LS (GC Amer-
ica; Alsip, IL) (Fig 29), inserted the natural die material (IPS
Natural Die Material 1, Ivoclar Vivadent) onto the resin coping,
and light-cured them (Fig 30). The stump shade was fabricated
from the same natural die material. To make sure a shade closer
to the stump was obtained, a light-curing paste (Lite Art, Shofu
Dental; San Marcos, CA) was applied to the stump die. The res-
torations final shade was checked with the custom stump dies
(Fig 31).

Figure 28: Veneers glazed and finished on the refractory die.

44 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 29: Red copings made from the master dies to prepare the custom Figure 30: Natural die material inserted
stump die. and cured on the resin coping.

Discussion
To address the patients main complaint (her two
tucked in and short lateral incisors) (Fig 32), it
was important to keep the same ceramic system
to avoid color discrepancies, especially since the
value can vary between different systems.12 It was
helpful to keep in mind that ceramic fragments are
an option when fixing Class IV cases. A feldspathic
ceramic system (Class I classification) showed the
best polish (in SEM) for this case, using a suitable
intraoral polishing system (Brasseler Ceramic Pol-
ishing Kit, Brasseler; Savannah, GA) (Fig 32). The
author used cocoa butter for trying-in this case
because he finds it gives the optical perception
of translucent try-in paste and has good handling
properties (Fig 33). However, translucent try-in
paste is generally recommended.13 Careful and
accurate execution of the above steps resulted in
attractive, natural-looking teeth (Fig 34) and a
functional, beautiful smile that made the patient
feel happy and confident (Fig 35).

Figure 31: Veneers seated on the custom stump die, final shade
checked.

Journal of Cosmetic Dentistry 45

CLINICAL COVER FEATURE

Figure 32: Initial presentation showing two tucked in and short lateral incisors.

Figure 33: Veneers carefully tried-in with cocoa butter.

46 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 34: Final restoration; natural-looking teeth.

Figure 35: Portrait of the satisfied patient.

Journal of Cosmetic Dentistry 47

CLINICAL COVER FEATURE

Case 5
Dentist: Delfin Barquero, DDS
Patient: Female in her 20s
Teeth Restored: #7, #8, #10 (feldspathic veneers with
Noritake EX-3); #9 (all-ceramic crown with Noritake EX-3
Press)

Case Description
The patients chief complaint was her badly discolored #9. She Figure 36: Initial image showing short, wide centrals;
also felt that her centrals were too wide and short (Fig 36). It discolored #9.
was determined that #9 had a previous problematic root canal
and it was 2 to 3 mm out of the arch facially. Orthodontics was
proposed, but not accepted. Therefore, our priority was creating
the space needed to mask the dark stump shade without losing
any translucency. Minimally invasive porcelain veneers were
proposed for #7, #8, and #10 to correct the shape and design
and a crown preparation was planned to restore #9.

Fabrication Details
A high-opacity all-ceramic material (ingot EW00, Noritake EX-3
Press, Kuraray Noritake Dental; Tokyo, Japan) was selected and
pressed to control and manage the extremely dark #9 stump
shade (Figs 37).14 The coping thickness was approximately 0.5
mm and, before selecting the porcelain powders, the coping
was checked with the custom stump die (Figs 38-41). The cop- Figure 37: Stump shade matching the shade tab.
ing was bonded with EW0 dentin powder to increase the value.
After the bonding layer, internal stain was applied before build-
ing up the dentin and incisor frame. The veneers for #7, #8, and
#10 were fabricated with traditional Noritake EX-3 porcelain
on the refractory die. Noritake EX-3 and Noritake EX-3 Press
porcelain powders are very similar in hue, value, chroma, and
translucency. The complete restoration was glazed and divested
(Fig 42) and checked on the custom stump die (Fig 43).

Figure 38: NWOO ingot coping. Figure 39: Coping inserted on

the custom stump die.

Figure 40: Coping

measures approximately Figure 41: Coping ready to
0.5 mm. press on ring.

48 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 42: Complete restoration glazed and divested.

Figure 43: Finished restoration inserted on custom stump die for the final shade check.

Journal of Cosmetic Dentistry 49

CLINICAL COVER FEATURE

Discussion
We took an unusual approach with this case.
Using two different materials and getting them
to match was not easy; however, with excellent
communication and photographs provided by
the doctor we were able to have full control. As
shown in Figure 36 #9 was labially inclined, but
It is vital that the dental technician
the patient had refused orthodontics. It was chal-
lenging to grind the tooth yet leave enough room fully understand the properties of
to manage different values. As the dentist and the these individual materialsand be
ceramist were so geographically distant, precise
able to select the most appropriate
digital photography was necessary to capture the
different stump shades hue, chroma, and value. system for each case.
Photoshop Smile Design was used to communi-
cate shape and dimensions. The patients chief
complaint of discolored, wide, and short centrals
was addressed (Fig 44) by redesigning the four
anterior teeth to create an exquisite final result
(Fig 45).

Figure 44: Final restoration showing the patients concerns addressed.

50 Spring 2016 Volume 32 Number 1

 Park/Ercus/Barquero/Figueira

Figure 45: Final smile.

Summary
All-ceramic material can achieve excellent esthetic results. There are a
number of different all-ceramic systems and a wide variety of ingots
from which to choose. It is vital that the dental technician fully un-
derstand the properties of these individual materials, including level
of opacity and translucency, and be able to select the most appropri-
ate system for each case. Other important factors to consider are the
amount of preparation needed and control of the stump shade using
a custom stump die. Standardized fabrication protocols such as the
skeleton build-up technique will allow the technician to have control
and be able to reproduce predictable and satisfying results.

Journal of Cosmetic Dentistry 51

CLINICAL COVER FEATURE

References
13. Chu SJ, Trushkowsky RD, Paravina RD. Dental color matching instruments and
1. Magne P, Hana J, Magne M. The case for moderate guided systems. Review of clinical and research aspects. J Dent. 2010;38 Suppl 2:e2-e16.
prep indirect porcelain veneers in the anterior dentition.
The pendulum of porcelain veneer preparations: from almost 14. Stover J. Todays popular all-ceramic materials: tips for success. Inside Dental Assist-
no-prep to over-prep to no-prep. Eur J Esthet Dent. 2013 Au- ing [Internet]. 2014 Jul/Aug 11(4). Available from: https://www.dentalaegis.com/
tumn;8(3):376-88. ida/2014/08/todays-popular-all-ceramic-materials jCD

2. McLaren EA. The skeleton buildup technique: a systematic ap-

proach to the three-dimensional control of shade and shape.
Pract Periodontics Aesthet Dent. 1998 Jun-Jul;10(5):587-97;
quiz 598.

3. Tak On T. Critical communication with well-documented pho-

Standardized fabrication protocols
tography. J Cosmetic Dent. 2015 Winter;30(4):114-22. such as the skeleton build-up
technique will allow the technician to
4. McLaren EA, Schoenbaum T. (2010). Digital photography en-
hances diagnostics, communication, and documentation. Com-
have control and be able to reproduce
pend Contin Educ Dent. 2011 Nov-Dec;32 Spec No 4:36-8. predictable and satisfying results.
5. McLaren EA, Schoenbaum T. Combine conventional and digital
methods to maximize shade matching. Compend Contin Educ
Dent. 2011 Nov-Dec;32 Spec No 4:30, 32-3. Mr. Park owns and operates SP Dental Arts in Gardena,
California.
6. Bazos P, Magne M. Getting it right the first time. J Cosmetic Dent.
2013 Summer; 29(2):36-41.

7. Bengel W. Mastering digital dental photography. Hanover Park

(IL): Quintessence Pub.; 2006.
Dr. Ercus is in private practice in Brussels, Belgium.
8. Tric O. The carrot model. Spectrum Dialogue. 2010 Feb;9(2):20-
30.

9. McLaren EA. Porcelain veneer preparations: to prep or not to

prep. Inside Dent. 2006 May;2(4)76-9.

10. Lesage B. Revisiting the design of minimal and no-preparation Dr. Barquero is an associate professor in the Esthetic Dentistry
veneers: a step-by-step technique. J Calif Dent Assoc. 2010 Department at University of El Salvador. He has a private prac-
tice in San Jos, Costa Rica.
Aug;38(8):561-9.

11. Chu S, Mieleszko A. Color matching strategies for non-vital discol-

ored teeth: part 1. J Esthet Restor Dent. 2014 Jul-Aug;26(4):240-6.

12. Grel G. The science and art of porcelain laminate veneers. Ber- Dr. Figueira is an instructor at the UCLA Center for Esthetic
Dentistry. He maintains private practices in Los Angeles and in
lin: Quintessence Pub.; 2003.
Caracas, Venezuela.

Disclosures: The authors did not report any disclosures.

52 Spring 2016 Volume 32 Number 1

 Transparency is
important.
Transparency for both the dentist and dental patient is crucial for
good health and safety. Dental laboratories play an important role
in achieving transparency and the proper level of patient care.

Ask your dental laboratory about their quality systems and good
manufacturing practices.

www.whatsinyourmouth.us | www.nadl.org
No Dentistry is Better than
No DentistryReally?
Understanding Modes of Tooth and Restoration Failure
John C. Kois, DMD, MSD

Dr. John Kois will present Modes of Failure on Saturday, April 30, at AACD 2016 Toronto.
In this course, he will cover recommended strategies and outline important diagnostic and
critical risk parameters to minimize failures, provide better treatment options, and maximize
predictable outcomes as outlined in this article.

Abstract
Historically, the goal of ideal dentistry has been to preserve natural tooth
structure with a conservative, restorative approach. However, this historical
principle could not take into account the advent of newer restorative materi-
als and techniques. When offering treatment choices, clinicians must exam-
ine both the risk and prognosis each choice involves and understand that
not all failures are equal; it is essential to understand the mode of failure and
differentiate tooth failure from restoration failure. Clinicians can no longer
assume that a treatment once considered more invasive will compromise
tooth prognosis more than treatment that traditionally has been considered
more conservative.

Key Words: comprehensive care, diagnosis and treatment, functional

dentistry, minimally invasive dentistry

54 Spring 2016 Volume 32 Number 1

 Kois

Not all failures are equalit is essential to understand modes of

failure and differentiate tooth failure from restoration failure.

Journal of Cosmetic Dentistry 55

Introduction ment and negate the purpose of minimally invasive" dentistry
(Fig 2). Clinicians must use the available science to offer better treat-
Outdated Outcomes Data ment choices that examine both the risk and prognosis each choice
Historically, ideal dentistry has aimed to preserve natural involves, while incorporating this information into informed con-
tooth structure with a conservative, restorative approach. sent for all patient decisions.
Developed over time, this approach employs the current In the future, dentistry would benefit greatly if measures of clini-
standard of minimally invasive techniques once it has cally meaningful consequences of treatment were available. This
been determined that dental procedures are necessary. information would support a careful weighing of options when de-
However, the oft-repeated corollary that all dentistry is ciding whether or not the protective benefit of a proposed treatment
a compromise may not be accurate. This belief is rooted would outweigh the risks of other adverse side effects as a result of
in the findings of outdated outcomes data. While older that treatment.
studies may have revealed increased risk to a tooth after
restoration, those studies preceded current and rapidly Understanding Modes of Failure
evolving science, materials, and technologies. In addi- Therefore, in order to assign risk and prognosis to treatment choices,
tion, the outcomes data reflected the limited choices in the clinician must understand how survival analysis and probability
restorative materials with the resultant dilemma that, are reported in the dental literature. Not all failures are equalit
many times, the tooth preparation was dictated by the is essential to understand modes of failure and differentiate tooth
needs of the material more than by the needs of the failure from restoration failure. It is also important to determine
tooth. For example, cavity preparation would be ex- whether the tooth failed because of the restoration compromise
tended to provide retention and resistance form or the rather than the initial compromise that led to the initial decision
reduction requirements were dictated by the dimension to restore the tooth. The following outline is intended to show the
needs of the material. Too often this necessitated sacri- key differences between tooth failure modes and restoration failure
ficing sound tooth structure, endangering the pulp, and modes.
impacting periodontal health (Fig 1).1-3

Limitations
The limitations inherent in these outdated outcomes
studies created a paradox of choice wherein, historically, a
compromised tooth that was not treated at all might have
had a better prognosis than the same tooth restored with
conventional treatment. In this model, the restorative
dentist unfortunately often faced a risk/reward ratio im-
balance or an unfavorable risk option, which supported
the belief that No dentistry is better than no dentistry, Figure 1: A metal ceramic crown
placing the dentist in a difficult position that skill level required adequate metal,
and training could not overcome. A crown for example, opaquer, and porcelain thickness
could never strengthen a natural tooth (no matter how for desired optical effect, but this
compromised remaining tooth
well the procedure was performed), but it could improve
structure.
the prognosis of a compromised natural tooth.

Assigning Risk and Prognosis

The ability to assign risk and prognosis to a proposed
treatment option is further complicated because the sur-
vival probability data often do not provide the reason
why the restoration was needed in the first place. The
clinician therefore cannot extrapolate a risk assessment
for the failure: was it more influenced by the reason (i.e.,
diagnosis) for restoration placement, rather than by the
restoration itself? The clinical dilemma in applying mini-
mally invasive principles is that a more conservative res-
toration may seal the tooth but inadequately protect it,
so a catastrophic failure actually becomes more likely in
the future. This would then require more invasive treat- Figure 2: Fractured endodontically treated #18 with an
occlusal composite now is nonrestorable.

56 Spring 2016 Volume 32 Number 1

 Kois

Modes of Tooth and Restoration Failure

I. Tooth Failure Modes F. Adhesive failure product vs. technique
A. Biofilm-mediated diseases 1. Microleakage interface management
1. Caries4 G. Cohesive failure
a. Pit and fissure system (Figs 3 & 4) 1. Engineering principles
b. Smooth surface proximal 2. Material properties
c. Cervical coronal to cementoenamel junction (CEJ) H. Luting agent selection
d. Apical below CEJ on root surface (Figs 5 & 6) I. Esthetics
2. Periodontal diseases host modulated
B. Environmentally mediated concerns biocorrosion (Figs
7 & 8)
1. Chemical (effect on enamel vs. dentin and
pulp-dentin complex)
a. Extrinsic (diet)
b. Intrinsic (gastroesophageal reflux disease [GERD], bu-
limia nervosa, cyclic vomiting syndrome [CVS])
C. Load-based mediated problems (Fig 9)
1. Friction attrition
2. Abrasion
3. Bite force abfraction
4. Cracked tooth syndrome (CTS)

II. Restoration Failure Modes

A. Recurrent caries (inside the restoration)
1. Microleakage
2. Fatigue of the luting agent load due to inadequate
occlusal management
3. Patient overload
4. Increased tooth preparation flexure (Fig 10). (Note: Dif-
ferent etiology from cavitation caused by caries suscep-
tibility.)
B. Gingival health five diagnostic keys5,6 (Fig 11) Figure 3: Radiograph indicates lesion already into dentin on
1. Biofilm the occlusal aspect.
2. Marginal integrity
3. Contour
4. Alloy sensitivity
5. Margin location
C. Endodontic therapy (Fig 12)
1. Pulpal burden from the tooth preparation
2. Weaker remaining tooth structure primarily from the
access preparation more than the endodontic therapy
itself.
D. Fractured restorations
1. Ceramic veneer chipping
2. Core fracture
3. Joint failure
E. Ill-fitting restorations
Figure 4: Risk of pit and fissure involvement would have been
1. Impressioning
reduced with pit and fissure sealant placement; more invasive
2. Image capture restoration is now required.
3. Fabrication system
4. Complete seating managing cement fluid dynamics

Journal of Cosmetic Dentistry 57

 Figure 5: Root caries located apical to the CEJ, which is more Figure 6: Root caries located apical to the crown margins
related to a proteolytic bacterial profile. indicates mode of failure involving patient risk factors not
related to the crown.

Figures 7 & 8: Environmentally mediated concerns have destroyed the natural tooth structure. Note, however, the prognosis
was improved by the more invasive crowns.

Figure 9: Load-based mediated problems (attrition) have Figure 10: Evidence of restoration failure mode due to fatigue
destroyed the natural tooth. However, the prognosis of #9 and washout of the luting cement, demonstrating why
was improved by the more invasive crown. occlusion and fatigue management may be more important
than shear bond strength (SBS). Zinc phosphate cement has
zero SBS but has been used very successfully with adequate
preparation design and occlusal management.

58 Spring 2016 Volume 32 Number 1

 Kois

Applying the Model Clinically

Prognosis and Risk
A molar with an occlusal cavitated lesion that is in-
creasing in size can be sealed more conservatively with
an occlusal composite than with amalgam. Because
the original occlusal cavitation was active, the restora-
tion would improve the tooths prognosis because the
active cavitated lesion has been removed, and now
the tooth might never get another occlusal cavitated
lesion. In short, this tooths risk is lowered and its
prognosis improved by removing the cavitation and
placing a restoration. However, that improved prog-
Figure 11: Evidence of a violation of biologic width. nosis is only for the risk of future biofilm-mediated
disease (caries) that affects the occlusal component
of the tooth, not the other modes of failure for which
an individual patient might be at risk. The future risk
is now the relative risk for all other modes of failure
within .4 mm from the pulp including the pulp and the structural compromise to
the tooth (e.g., risk of CTS, irreversible pulpitis), as
well as environmental and load risks for which the in-
dividual person (occlusion) and the tooth (local en-
vironment) are at risk. Reducing the risk of CTS may
require cuspal coverage. This requires the removal of
more tooth structure, but may ultimately prevent CTS
and the catastrophic loss of the tooth, which would
then require more invasive procedures. These deci-
sions to determine what treatment to provide ulti-
mately will vary significantly, based upon a multitude
of factors: the size of the original lesion; the restora-
tion design (onlay or full-coverage); patient-specific
Figure 12: Tooth preparation indicating a potential pulpal
factors; and material choices (gold, porcelain, or met-
compromise.
al ceramics) (Figs 13 & 14).7

Figure 13: Evidence of environmentally mediated tooth Figure 14: Evidence of biofilm-mediated cavitation on the
structure loss. distal aspect of #19.

Journal of Cosmetic Dentistry 59

Solutions to Reduce Risk
When developing treatment options, there are no
definitively correct answers, only solutions to reduce
risk. The treatment choices must be derived from data
first to determine the treatment options that best im-
prove the prognosis of the tooth and reduce as many
risk factors as possible. While subjective factors such
as operator bias, cost, and time may dictate which
treatment is chosen, those factors should not be con-
fused with determining what is best for the tooth and
are of critical importance when providing informa-
tion so the patient can give informed consent. The
development of predictive judgment instead of merely
reactive decision making is critical in preventing the
catastrophic outcome. To be in the tooth mortality
Figure 15: Initial tooth preparation eliminates biofilm and
business would be much easier if the problems we
environmentally mediated tooth structure loss.
need to treat involved fewer risk concerns.
In the case shown in Figure 15, a bonded onlay
made from a higher-strength glass ceramic (lithium
disilicate) capable of adhesive technology was uti-
lized because it provided cuspal coverage. This likely
decreased the risk of tooth fracture and also offered
protection against environmentally induced occlusal
tooth loss, because less natural tooth structure was ex-
posed to the oral environment. It is more conservative
than a traditional porcelain crown and is even more
conservative than gold (no resistance and retention
form necessary), while providing adequate strength
with the same reduction requirements as gold.8 A gold
restoration fails most commonly at the tooth interface
rather than within the gold restoration itself. This is
a less favorable mode of failure, due to the increased
probability of damage to tooth structure and resultant
need for further and likely more invasive treatment,
Figure 16: Restoration for #19 reduces the risk of all biofilm-
which reduces the prognosis. In contrast, if this bond-
mediated tooth structure loss involving enamel. Restoration
ed ceramic restoration failed, the failure would most reduces the risk of environmentally mediated tooth structure
likely compromise the restoration through porcelain loss. Restoration provides occlusal protection, mitigating load-
fracture or adhesive failure, but would be unlikely to initiated risk to the tooth. Monolithic material and a luting
damage the tooth. This bonded restoration is more agent with high fatigue management allow ultraconservative
invasive than a direct composite but offers more po- tooth reduction that reduces the risk of restoration failure and
tential risk reduction in the long term (Fig 16). If this may be more favorable long term than a more conservative
were your tooth, what would you want? direct restoration done initially.

When developing treatment options, there are no definitively correct

answers, only solutions to reduce risk.

60 Spring 2016 Volume 32 Number 1

 Kois

Summary 5. Kois JC. The restorative-periodontal interface: biological parameters. Periodontol 2000.
It is not always correct to assume that treatment once 1996 Jun;11:29-38.
considered more invasive will compromise the ulti-
mate tooth prognosis more than the treatment that 6. Kois JC. The gingiva is red around my crownsa differential diagnosis. Dent Econ.
was traditionally considered more conservative, espe- 1993 Apr;83(4):101-2.
cially if the more conservative restoration has a lower
survival probability and risks further compromise 7. Magne P, Belser UC. Porcelain versus composite inlays/onlays: effects of mechanical
of tooth structure. Newer monolithic materials, lut- loads on stress distribution, adhesion, and crown flexure. Int J Periodontics Restorative
ing agents, improved protocols, and disruptive tech- Dent. 2003 Dec;23(6):543-55.
nologies have blurred the previous concepts of what
constitutes minimally invasive dentistry. The future 8. Kois DE, Chaiyabutr Y, Kois JC. Comparison of load-fatigue performance of posterior
of restorative dentistry will continue trending toward ceramic onlay restorations under different preparation designs. Compend Contin Educ
less invasive procedures as newer science is com- Dent. 2012 Jun;33 Spec No 2:2-9.
bined with traditional protocols. Minimally invasive
dentistry will be ultraconservative (to preserve tooth
structure and minimize pulpal risks), utilizing thin
monolithic crowns (to reduce porcelain chipping and
have adequate strength), and be adhesively retained The future of restorative dentistry will
to minimize microleakage and fatigue problems. In
essence, the restoration could be more like a crown/ continue trending toward less invasive
veneer hybrid (croneers). procedures as newer science is combined
As dentistry moves beyond simple consideration with traditional protocols.
of the outcomes reported in randomized clinical tri-
als to include the evaluation of an individual patients
risk factors for all the modes of failure (e.g., biofilm-
mediated, environmentally mediated, and load-initi-
ated) that are patient-specific or localized to the tooth,
a different approach to minimally invasive dentistry
Dr. Kois is the director of the Kois Center, in Seattle, Washington. He
is evolving. The next paradigm shift that is emerging
also maintains a private practice in Seattle.
in dentistry will result in a restoration that performs
better than many natural teeth exposed to our mod-
ern environment. Perhaps bionic teeth may be on the
horizon?
Disclosure: The author did not report any disclosures.

References

1. Magne P, Versluis A, Douglas WH. Rationalization of incisor

shape: experimental- numerical analysis. J Prosthet Dent. 1999
Mar;81(3):345-55.

2. Magne P, Douglas WH. Cumulative effects of successive restor-

ative procedures on anterior crown flexure: intact versus veneered
incisors. Quintessence Int. 2000 Jan;31(1):5-18.

3. Magne P, Douglas WH. Rationalization of esthetics: restorative

dentistry based on biomimetics. J Esthet Dent. 1999;11(1):5-15.

4. Young DA, Novy BB, Zeller GG, Hale R, Hart TC, Truelove EL,
American Dental Association Council on Scientific Affairs.
The American Dental Association Caries Classification Sys-
tem for clinical practice: a report of the American Dental As-
sociation Council on Scientific Affairs. J Am Dent Assoc. 2015
Feb;146(2):79-86.

Journal of Cosmetic Dentistry 61

From 2D to
Complete Digital Workflow in Interdisciplinary Dentistry

Christian Coachman, DDS, CDT

Marcelo Alexandre Calamita, DDS, MSD, PhD
Newton Sesma, DDS, MSD, PhD

Dr. Christian Coachman will present The Virtual Lab and the
Complete Digital Workflow on Friday, April 29, at AACD 2016
Toronto. In this course, he will introduce the new generation of
interdisciplinary software that allows clinicians to develop facial
analysis to 3D smile design, interdisciplinary planning, and fab-
rication of everything needed to restore a smile.

Abstract
The use of digital technology is becoming more common in clinical den-
tistry. A general knowledge of the scope of these resources can help clini-
cians to develop more precise treatment plans and achieve more predict-
able clinical results. This article discusses novel ways to integrate patient
data into a digital workflow in interdisciplinary dentistry. A complete dig-
ital workflow that increases the predictability of the clinical procedures
and relates the initial project to the final outcome is presented.

Key Words: esthetic dentistry, dynamic smile analysis, video docu-

mentation, smile design, smile frame

62 Spring 2016 Volume 32 Number 1

 Coachman/Calamita/Sesma

Virtual planning uses patient photographs

and videos to digitally design a new smile
to facilitate communication between the
interdisciplinary team and the patient.

Journal of Cosmetic Dentistry 63

Introduction
The digital workflow, with its ability to improve di-
agnosis and render more predictable treatment plans
than conventional workflows,1 is being increasingly
used in many areas of clinical dentistry. It also allows
standardization of quality due to an industrially con-
trolled manufacturing process and so tends to reduce
the number of consultations. Furthermore, the digital
workflow can be more efficient than the conventional
workflow in terms of cost/time2 and shows high pa-
tient acceptance.3,4
Two main topics related to digital workflow have
been reported in the literature: virtual planning and
execution with digital CAD/CAM methods.5,6 Virtual
planning uses patient photographs and videos to digi-
tally design a new smile7 to facilitate communication
between the interdisciplinary team and the patient.
Digitally milled models,8 virtual articulators,9 and
planning software complement the resources for an
evaluation and interpretation of clinical data to help
predict patient outcomes and modulate expectations.
New integrated technologies such as intraoral scan-
ners,10,11 digitally produced surgical guides,12-14 and
CAD/CAM methods and materials15-17 enable the digi-
tal execution of rehabilitative therapies with greater
predictability and security.
The goals of this article are as follows:
Present an interdisciplinary software platform
that not only produces CAD/CAM restorations
and devices, but also helps in the challenging
interdisciplinary decision-making process.
Show a simple workflow that starts with a two-
dimensional (2D) smile frame that is overlapped
onto three-dimensional (3D) orthodontic, or-
thognathic, implant, and restorative software.
Link smile design to functional interdisciplinary
treatment plans. Figure 1: Smartphone video documentation.
Present a complete digital workflow that increases
the predictability of the clinical procedures and
relates the initial project to the final outcome.

Video/Photo Documentation By using slide presentation software programs

In dentistry it is very important to analyze specific as well as cloud sharing and group messaging
instances of facial expression (e.g., lips at rest, height
of the smile line, lip shapes, integration of facial and apps, all the involved professionals can
dental midline, lip support, soft tissue display, buc- communicate effectively online.
cal corridor, and facial profile) to understand the den-
tofacial disharmonies and make clinical decisions.
All these analyses can be distorted if we look only
at photographs. Videos can capture the specific view
with slightly different angles and can be transformed
into photos by pausing the video and making a print
screen of the correct angle. The facial analysis through
video should guide the smile design process, which
will be done over 2D and 3D static images (Fig 1).

64 Spring 2016 Volume 32 Number 1

 Coachman/Calamita/Sesma

Integrative Technology
The main goal of the DSD technique (Digital Smile
Design; So Paulo, Brazil) on the computer is to ad-
just the photographs from the three main views (12
oclock, frontal, and occlusal) (Fig 2) with each other,
assisted by the digital ruler, and to add the lines and
drawings that will create the smile frame, always based
on the video analysis. This frame (Fig 3) is useful ex-
tra information that, together with the conventional
documentation of the patient (e.g., x-rays, models,
medical history, clinical exam, perio chart), helps to
Figure 2: The 2D/3D digital workflow.
facilitate a better decision-making process and inter-
disciplinary interaction.

Team Communication
Sharing the patients video and smile frame slide pre-
sentation with the specialists who will be involved
with the case allows the whole teameven those team
members who were not present at the first appoint-
ment with the patientto become familiar with the
case. By using slide presentation software programs
as well as cloud sharing and group messaging apps,
all the involved professionals can have access to the
information, each in his or her own time, and com-
municate effectively online (online asynchronous
communication) (Fig 4). With this protocol it is pos-
sible to overcome two of the main challenges of in-
terdisciplinary dentistry: difficulty in geographically
distant team members being able to communicate at
the same time and lack of common vision among the
interdisciplinary team regarding the cases final ideal
Figure 3: Smile frame on the three views of frontal, occlusal, and 12 oclock.
outcome.

Figure 4: Online asynchronous communication.

Journal of Cosmetic Dentistry 65

Digital Wax-Up: The 2D to 3D Digital Periodontics
Link The crown-lengthening procedure also can be digitally planned (Fig 14).
The 3D design guided by the smile frame is printed and then a vacuum
The 2D smile frame can be translated into a 3D proj- tray is fabricated showing the exact new position of bone and soft tissue
ect, either analog (conventional wax-up) or digital (3D (Fig 15).
digital wax-up). The facial reference must also guide
the digital 3D design. Therefore, the 2D smile frame Orthognathic
project should be linked to 3D software programs. Us- In cases where restorative dentistry will be integrated with orthognathic
ing 2D/3D DSD Connect (Hack Dentistry; Bucharest, surgery it is very important to integrate the smile frame and the 3D digital
Romania), it is possible to overlap and calibrate 2D design of the restorations into the orthognathic software (Fig 16).
images over various 3D software programs (Figs 5a-
6c). Using software that already has the 2D/3D con- CAD/CAM Restorations and Function
cept embedded is also an option to develop the 3D The upper facially guided smile design can be placed in the digital articu-
smile design project following the facially generated lator to check the relationship between the new design and the actual
2D smile frame (NemoDSD 2D/3D, Nemotec; Ma- occlusal situation. The goal is to adjust the esthetics to achieve ideal func-
drid, Spain) (Fig 7). tion. Most CAD/CAM software offers a virtual articulator that works as
Regardless of the type of 2D and 3D software em- a semi-adjustable articulator, allowing for the adjustment of maximum
ployed, the final 3D file (in StereoLithography [STL] intercuspal contacts, protrusion, and lateral movements (Fig 17). When
format) will be exported to a printing machine to gen- tooth preparation is done the STL file of the preparations can be over-
erate the physical model of the new design. This mod- lapped onto the 3D design so the restorations can be designed following
el can be used to fabricate a matrix for a mock-up and the exact same shape, position, arrangement, and occlusion that was de-
the provisional, and also guides for tooth preparation, veloped on the 3D digital design (Figs 18a & 18b).
crown lengthening, and implant placement (Fig 8).
Final Considerations
Digital Performance in Interdisciplinary All the devices fabricated to perform the treatmentguides, splints, ap-
Dentistry pliances, components, and restorationsshould facilitate the process of
maintaining precision between the initial plan and the final outcome (Fig
19). The presentation to the patient begins with placement of the moti-
Orthodontics vational mock-up, followed by the photography/video session. After the
The DSD Connect software also can be overlapped patient receives the motivational mock-up (Fig 20), the treatment plan is
with orthodontic software programs such as Invisalign presented. If the patient approves the plan, the rehabilitative procedures
(Align Technology; San Jose, CA) and OrthoAnalyzer may be performed in a completely digital flow integrating the initial smile
(3Shape; Copenhagen, Denmark) to guide the orth- design project into the clinical orthodontic, periodontal, orthognathic
odontic digital setup (Figs 9a-10b). The smile frame surgery, guided implant surgery, and/or restorative procedures.
also can be integrated with orthodontic digital plan- The case history, clinical examination, respect for biological principles,
ning by using software that already has the 2D/3D and knowledge of esthetic and functional references remain the keys to
link embedded (NemoDSD Ortho) (Fig 11). the success of the digital workflow, just as they always have been for the
conventional workflow.
Implant Dentistry
The smile frame can be overlapped to cone beam
computed tomography (CBCT) files and guided sur-
gery software programs. It is possible to superimpose
the smile frame over a CBCT file using the DSD Con- Regardless of the type of 2D and 3D software
nect software (Fig 12), or it can be automatically inte- employed, the final 3D filewill be exported
grated with implant software programs that have the
smile frame feature (NemoDSD Guided Surgery) (Fig to a printing machine to generate the physical
13). The guided surgery software integrated with the model of the new design.
smile design software enables the implant planning
related to the facially guided 3D design (digital wax-
up).

66 Spring 2016 Volume 32 Number 1

 Coachman/Calamita/Sesma

a b

Figures 5a & 5b: a) Smile frame developed on 2D software. b) Smile frame overlapped and calibrated to the 3D CAD/
CAM software (Cerec, Sirona Dental Systems GmbH; Bensheim, Germany) guiding the shopping and arrangement of the
3D design.

a b c

Figures 6a-6c: a) Smile frame. b) Smile frame without the images. c) Smile frame overlapped and calibrated to the 3D CAD/
CAM software (3Shape, Copenhagen, Denmark)..

Journal of Cosmetic Dentistry 67

 Figure 8: Printed models and vacuum tray.
Figure 7: 3D smile design.

a b

Figures 9a-9c: a) Occlusal smile frame with

the drawings suggesting the orthodontic
movements (yellow). b) Invisalign ClinCheck
software overlapped by the smile frame.
c) After the virtual orthodontic movement,
matching the smile frame.

a b

Figures 10a & 10b: a) Frontal smile frame suggesting orthodontic movements (yellow). b) 3D model calibrated to the smile
frame ready to start the virtual setup procedure.

68 Spring 2016 Volume 32 Number 1

 Coachman/Calamita/Sesma

Figure 11: Digital Ortho software with the smile frame integrated.

Figure 12: CBCT file and smile frame superimposition using the Connect software program.

Journal of Cosmetic Dentistry 69

 Figure 13: Smile frame, 3D scan model, and CBCT superimposed.

Figure 14: Overlapping the 2D smile frame of the 3D model to plan the crown-lengthening procedure.

Figure 15: The crown-lengthening guide designed to control the bone and soft tissue reduction based on the 3D
digital design.

70 Spring 2016 Volume 32 Number 1

 Coachman/Calamita/Sesma

Figure 16: The Orthognathic NemoCeph software integrated to the smile design software.

Figure 17: Facially guided smile design checked in the digital articulator.

Journal of Cosmetic Dentistry 71

 a b

Figures 18a & 18b: a) STL of the prepped model. b) The 3D restorations (yellow) are adapted to the digital wax-up (green).

Figure 19: All the devices and models digitally designed and fabricated with milling and printing technology.

72 Spring 2016 Volume 32 Number 1

 Coachman/Calamita/Sesma

Figure 20: Patient without and with the mock-up for the motivational presentation.

References

1. Hmmerle CH, Cordaro L, van Assche N, Benic GI, Bornstein M,

Gamper F, Gotfredsen K, Harris D, Hrzeler M, Jacobs R, Kapos
T, Kohal RJ, Patzelt SB, Sailer I, Tahmaseb A, Vercruyssen M, Wis-
meijer D. Digital technologies to support planning, treatment,
and fabrication processes and outcome assessments in implant
All the devices fabricated to perform the
dentistry. Summary and consensus statements. The 4th EAO treatmentshould facilitate the process
consensus conference 2015. Clin Oral Implants Res. 2015 Sep;26 of maintaining precision between the
Suppl 11:97-101.
initial plan and the final outcome.
2. Joda T, Brgger U. Digital vs. conventional implant prosthetic
workflows: a cost/time analysis. Clin Oral Implants Res. 2015
Dec;26(12):1430-5.

3. Wismeijer D, Mans R, van Genuchten M, Reijers HA. Patients

preferences when comparing analogue implant impressions us-
ing a polyether impression material versus digital impressions
(Intraoral Scan) of dental implants. Clin Oral Implants Res. 2014
Oct;25(10):11138.

Journal of Cosmetic Dentistry 73

4. Joda T, Brgger U. Patient-centered outcomes comparing digital 15. Kapos T, Evans C. CAD/CAM technology for implant abutments, crowns, and superstruc-
and conventional implant impression procedures: a randomized tures. Int J Oral Maxillofac Implants. 2014;29 Suppl:117-36.
crossover trial. Clin Oral Implants Res. 2015 Apr 12. doi: 10.1111/
clr.12600. [Epub ahead of print]. 16. Keerthi S, Proussaefs P, Lozada J. Clinical and laboratory steps for fabricating a com-
plete-arch fixed prosthesis using CAD/CAM. Int J Periodontics Restorative Dent. 2015
5. Lanis A, Padial-Molina M, Gamil R, Alvarez del Canto O. Com- Jul-Aug;35(4):473-80.
puter-guided implant surgery and immediate loading with a
modifiable radiographic template in a patient with partial eden- 17. Gracis S, Thompson VP, Ferencz JL, Silva NR, Bonfante EA. A new classification system
tulism: a clinical report. J Prosthet Dent. 2015 Sep;114(3):328- for all-ceramic and ceramic-like restorative materials. Int J Prosthodont. 2015 May-
34. Jun;28(3):227-35. jCD

6. Lewis RC, Harris BT, Sarno R, Morton D, Llop DR, Lin WS. Max-
illary and mandibular immediately loaded implant-supported
interim complete fixed dental prostheses on immediately placed
The case history, clinical examination,
implants with a digital approach: a clinical report. J Prosthet respect for biological principles, and
Dent. 2015 Sep;114(3):315-22. knowledge of esthetic and functional
7. Coachman C, Calamita MA. Digital Smile Design: a tool for treat-
references remain the keys to the
ment planning and communication in esthetic dentistry. QDT success of the digital workflow, just
2012. Hanover Park (IL): Quintessence Pub.; 2012. p. 103-11. as they always have been for the
8. Lee SJ, Betensky RA, Gianneschi GE, Gallucci GO. Accuracy of
conventional workflow.
digital versus conventional implant impressions. Clin Oral Im-
plants Res. 2015 Jun;26(6):715-9.

9. Solaberrieta E, Minguez R, Etxaniz O, Barrenetxea L. Improving

Dr. Coachman has a private practice in So Paulo, Brazil.
the digital workflow: direct transfer from patient to virtual articu-
lator. Int J Comput Dent. 2013;16(4):285-92.

Lee SJ, Gallucci GO. Digital vs. conventional implant im-

10.
pressions: efficiency outcomes. Clin Oral Implants Res. 2013
Jan;24(1):1115.

11. Reich S, Kern T, Ritter L. Options in virtual 3D, optical-impres- Dr. Calamita has a private practice in So Paulo, Brazil.
sion-based planning of dental implants. Int J Comput Dent.
2014;17(2):101-13.

12. Mandelaris GA, Vlk SD. Guided implant surgery with placement
of a presurgical CAD/CAM patient-specific abutment and provi-
sional in the esthetic zone. Compend Contin Educ Dent. 2014
Jul-Aug;35(7):494-504.
Dr. Sesma is an assistant professor, Department of Prosthodontics,
13. Gallucci GO, Finelle G, Papadimitriou DE, Lee SJ. Innovative ap- School of Dentistry, University of So Paulo, So Paulo, Brazil.
proach to computer-guided surgery and fixed provisionalization
assisted by screw-retained transitional implants. Int J Oral Maxil-
lofac Implants. 2015 Mar-Apr;30(2):403-10.
Disclosures: Dr. Coachman is a co-founder of DSD.
14. Ganz SD. Three-dimensional imaging and guided surgery for Dr. Calamita is on the advisory board of DSD.
Dr. Sesma is on the advisory board of and is an instructor for DSD.
dental implants. Dent Clin North Am. 2015 Apr;59(2):265-90.

74 Spring 2016 Volume 32 Number 1

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New Algorithm
in Shade Matching
Achieving a More Predictable Shade Match and Color Map
Using a Technology-Driven and Laboratory-Supported Process

Jerry C. Hu, DDS

Chu Han Wang, BSc
David Kuhns, PhD

Abstract
Determining an accurate shade can be very challenging be-
cause the process is inherently wrought with potential for er-
ror on multiple levels. Individual human differences in per-
ception, variations among shade tabs and how they are used,
inconsistent lighting conditions, and the documentation
equipment can all contribute to inconsistent and inaccurate
shade matching that leads to discrepancies in final restora-
tions. Although a variety of digitally based shade-taking so-
lutions have been introduced to supplement classic manual
methods, what has been needed is a standardized process
that not only incorporates technology, but also accounts for
how easily the equipment and process can be integrated and
utilized by the dental practice staff. This article describes a
technology-driven and laboratory-supported process for
digitally determining and simplifying the shade-matching
process.

Key words: technology-driven and laboratory-supported

process, integrated digital shade-taking technologies,
digital image shade-matching software

76 Spring 2016 Volume 32 Number 1

 Hu/Wang/Kuhns

Journal of Cosmetic Dentistry 77

Introduction For this reason, conventional shade taking has been supplemented
Among the collaborative dentist-laboratory tasks re- and/or replaced by shade mapping, in which the occurrences of multiple
quired to produce natural-looking esthetic restora- hues, chromas, and values within natural teeth are accurately depicted
tions is accurate shade matching. Determining an and communicated to enable reproduction not only of color, but also
accurate shade, however, can be very challenging be- polychromatic detail.1,4,7 Shade maps illustrate the value of the tooth
cause the process is inherently wrought with potential in different areas (e.g., gingival, body, incisal) independently compared
for error based on multiple and individual human to the shade guide, enabling dental ceramists to determine how much
differences in perception; the use of different shade- transparency or opalescence is required to achieve the desired esthetic
matching techniques, materials, and equipment; and effect.1,3 However, even shade-mapping accuracy is subject to individual
other influences, such as varied lighting conditions differences and outside influences that affect the interpretation of color,
and clothing and background color.1,2 value, hue, and chroma, as well as how specifically those components are
Traditionally, determining a tooths shade is ac- communicated.
complished by one or more dental office team mem- Given these contributory variables that affect shade takingas well as
bers, with each tooth to be restored requiring a sepa- differences among photography skills and the equipment usedit is not
rate shade to be matched with an individual shade surprising that inconsistencies in shade matching have been cited in the
tab. Several team members may provide their opin- literature.8 When different individuals attempted to correctly identify the
ions to determine which shade is a correct match, and same shade under different lighting conditions, individuals agreed on the
identifying the ideal shade may be further complicat- exact same shade only 29.3% of the time, with a wide variety of shades
ed if the practice uses several different shade guides, selected the remaining 70.7% of the time.8
including stump shades.3-5
Each commercially available shade tab demon- Resolving Shade-Matching Issues
strates a single value, but presents different properties Over the years, dental product, equipment, software, and other manu-
and multiple chroma areas in the gingival, body, and facturers have endeavored to resolve the issues and challenges associated
incisal zones. Gingival areas present more chroma with accurately taking tooth shades and color matching restorations. It
than body and incisal areas, and it may be difficult is generally agreed that a consistently reproducible systematic process is
for laboratories to determine which shade tab zone needed to enable dental practice team members to easily, efficiently, con-
was concentrated on when selecting the restorative fidently, and independently determine accurate shades.
shade, especially if it was not communicated by the In response to these needs, a variety of digitally based shade-taking
dentist. Additionally, the manner in which the shade solutions have been introduced to supplement classic manual meth-
tab is oriented next to the tooth also affects how tooth ods, including but not limited to spectrophotometric approaches and
shade is determined.6 three-dimensional intraoral scanning techniques, and success has been
These shade-taking nuancesin addition to en- documented for each technology.9-11 Some of these technologies include
vironmental variables (e.g., overhead and ambient SpectroShade System (MHT International; Newtown, PA), ShadeScan
light, background, sunny or overcast weather)are all System (Cynovad; Saint-Laurent, QC, Canada), 3Shape (Copenhagen,
significant factors in correctly determining the shade Denmark), Vita EasyShade (Carestream Dental; Atlanta, GA), and others.
properties of individual teeth.1-4 They are also essen- Despite the numerous benefits of these advancements, creating stan-
tial considerations in cases involving adjacent teeth dardized processes has been difficult. Doing so depends not just on the
requiring restoration, or those in which six or more technology, but on how the technology is integrated and utilized by the
units must be matched with the premolars or posteri- dental practice and laboratory on a daily basis to achieve consistently
or teeth, where value, chroma, and hue should blend optimal outcomes across many cases and difficulty levels. For example, a
harmoniously in every respect. need has been observed for a standardized photography process for den-
Lighting, in particular, will impact how tooth tal practices in which a defined photographic setup incorporates a digital
shade color is interpreted and how different material shade map and in-lab protocol to reduce the likelihood of errors.12
translucencies will affect that interpretation of color.7 As a result, many laboratories have developed their own process sys-
Interestingly, the interplay of light with different ana- tems for use with their dental practice customers to streamline shade
tomical tooth characteristics (e.g., primary to tertiary taking and build strong, consistent communications about restorative
details, embrasures, overall contours), can also con- requirements.13 These systems may incorporate and combine advanced
tribute to difficulties when shade matching to adja- digital shade taking technologies (e.g., scanners, photospectrometers,
cent teeth, such as in a single or two-unit case in the shade-mapping software), customized shade tabs, and single lens reflex
maxillary esthetic zone.1 (SLR) photography.

78 Spring 2016 Volume 32 Number 1

 Hu/Wang/Kuhns

New Shade-Taking Technology

One such system is the MicroShade process (Micro-
Dental Laboratories; Dublin, CA), which combines
digital image shade-matching software (ShadeWave;
Issaquah, WA), color mapping, digital photography,
and specific dental practice and laboratory techniques
to help eliminate individual influences and external
variables that can impact shade taking accuracy and
consistency.

Dental Practice Process

The necessary technology includes a single calibrated
shade tab (ShadeWave), moderate-quality SLR digital
camera, and extension arm attached to the bottom of
the camera via a screwwhich is common on all SLR
camerasthat holds the tab at the correct angle and
distance from the camera and flash (Fig 1), but can
collapse for easy storage.
With this configuration, the geometry of the cam-
era lens, flash, and shade tab is already set, which is Figure 1: A retracted smile photograph is taken with an SLR camera, attached
critical to ensuring that shade photographs are in fo- and fixed photo arm, and calibrated shade tab at the proper angles to facilitate
shade verification and streamline the shade selection process.
cus and no glare results on the teeth or tab. The tab
does not need to be adjacent to a particular tooth,
only in focus with the teeth of interest. This geometry
also enables the shade-mapping software to properly
analyze the tooth color and shades.
It allows the dental practice staff to produce the
same quality shade images quickly and consistently.
Once the photograph is taken, it is uploaded to the
laboratory via a custom portal (e.g., MyDentallab.
com, MicroDental) as part of the digital laboratory Lighting, in particular, will impact
prescription process and submitted accordingly.
how tooth shade color is interpreted
Laboratory Process and how different material
At the laboratory, the uploaded images are trans- translucencies will affect that
ferred directly into manufacturing software, which
is accessed by the technician and analyzed using the interpretation of color.
software. To determine the shade, the technician first
uses the software to correct the image and normalize
for light conditions (Figs 2a-2c) according to an al-
gorithm that accounts for known hue, chroma, and
value of the gray, black, white, and shade sample on
the shade guide (Figs 2a-2c). This algorithm is then
applied to the entire photograph to account for light
variations, after which a shade map is displayed.
Since each area of the tooth is mapped, the process
also overcomes another common error related to con-
ventional shade tabs: single value with multiple chro-
ma areas. Instead, the software maps the tooth shades,
determines the level of characterization required, and
matches neighboring teeth according to the doctors
prescription.

Journal of Cosmetic Dentistry 79

Figure 2a: Original patient photograph taken chairside with the Figure 2b: Software and the reference tab were used to correct the
reference tab. photograph for hue and value.

Further, because how the value and chroma of final

restorations is controlled varies among each ceramic
material, the laboratory follows a protocol and applies
the software to assess the hue, chroma, and value of
the shade map according to the restoration design and
selected material. Value is the most misrepresented
variable in shade matching. Since highly translucent
materials usually demonstrate lower value compared
to low translucency materials, once the value is known
across the tooth and the restorative material is chosen,
an experienced technician can create the proper value
for the selected ceramic system.
This is especially critical when a stump is colorized,
which can influence the final shade. By following this
protocol, the technician can layer or adapt a substruc-
ture value by adding thickness or substructure stains
to achieve the desired end result.
Figure 2c: A shade map showing the shade values were calculated based on
the photographic adjustments as shown in Figure 2b. Additionally, because the software can verify the
hue, chroma, and value of particular ceramic system
samples, a shade map of a reference crown and stump
can be mapped from the same photograph to correctly
stack value.
a variety of digitally based shade- The following cases demonstrate the manner in
taking solutions have been introduced to which the MicroShade process was used between the
dental teams and laboratory to enhance the accuracy
supplement classic manual methods and efficiency of determining tooth shades. Once the
dental teams were properly trained to take, orient, and
produce a good quality digital photograph, the entire
process required less than two minutes, on average. In
fact, in each case, shade-taking time was reduced from
10-20 minutes to less than 5 minutes.

80 Spring 2016 Volume 32 Number 1

 Hu/Wang/Kuhns

Case Reports
Case 1: Maxillary Esthetic Zone, Teeth ##6-11
A 33-year-old female who was always displeased with
the gaps and old direct restorations on her maxillary
anterior teeth presented as a new patient for a smile
makeover (Figs 3-5). She also did not like the shape
of her lateral incisors, where prior dental work made
them much wider in efforts to decrease the diaste-
mas between her central incisors. Axial inclinations,
contours, and proportions were also problematic.
Planned treatment involved six conservative and min-
imally invasive lithium disilicate veneers (IPS e.max,
Ivoclar Vivadent; Amherst, NY). Figure 3: Case 1: Preoperative full-face frontal view.
The patient was advised that careful planning
would require detailed photography for communi-
cation with the laboratory, as well as precise shade
matching between her anterior teeth, posterior bicus-
pids, and/or buccal corridor to ensure her new smile
would appear as natural and pleasing to the eye as
possible. The shades were mapped out using the dis-
cussed process. Evaluating her midline, cervical and
incisal embrasures, and proper axial inclinations was
also of paramount importance for achieving the best
esthetic outcome.
During the preparation appointment, the same
shade-mapping process was used to verify how the
temporaries (Integrity, Dentsply; York, PA) looked ad-
jacent to her bicuspid teeth (Figs 6a-6c). Utilizing this
communication method midway through treatment
Figure 4: Case 1: Preoperative retracted frontal 1:2 view at 1:3
provided the dentist, patient, and laboratory techni- magnification.
cian with a sense of security regarding the esthetic and
color-mapping direction of the case.
After the definitive restorations were seated, the
harmonious blend of the veneers with the full smile
confirmed the success and accuracy of the shade-tak-
ing and color-mapping process used (Figs 7-8b). The
patient reported they looked very natural, especially
noting they all looked polychromatic and lifelike.

many laboratories have developed

their own process systems for
use with their dental practice
customers to streamline shade Figure 5: Case 1: Preoperative non-retracted full smile, frontal
taking and build strong, consistent 1:2 view at 1:3 magnification.
communications about restorative
requirements.

Journal of Cosmetic Dentistry 81

 a

Figure 7: Case 1: Postoperative full-face frontal view.

Figure 8a: Case 1: Postoperative retracted frontal 1:2 view at 1:3

magnification.

Figures 6a-6c: Case 1: Midway through treatment during the Figure 8b: Case 1: Postoperative non-retracted full smile, frontal 1:2
preparation and provisional phase, the same communication view at 1:3 magnification.
process was used to confirm the shade mapping and shade
selection prior to fabricating the definitive veneer restorations.

82 Spring 2016 Volume 32 Number 1

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 Case 2: Maxillary Esthetic Zone Implant Restoration
An 82-year-old female presented with a prior root fracture on tooth #8 (Fig 9).
Old porcelain-fused-to-metal (PFM) crowns were present on all other adjacent
maxillary teeth in the esthetic zone and she was adamant that she did not want
them replaced. She requested only implant placement and restoration at the #8
site.
The initial shade was captured using the discussed process (Fig 10). Because
she had existing PFM material in the esthetic zone, the process and software
were used to match those materials as well as fabricate an implant-supported
PFM crown for #8 (Figs 11 & 12). The final result was a well-matched, estheti-
cally pleasing implant restoration that demonstrated the proper emergence pro-
file, gingival architecture, and support.

Figure 9: Case 2: Preoperative full-face frontal view. Figure 10: Case 2: A shade-mapping photograph was taken
for the implant restoration planned for the #8 site. Note the
adjacent teeth all have existing PFM crowns.

Figure 11: Case 2: Postoperative full-face frontal view. Figure 12: Case 2: Postoperative non-retracted lateral right 1:2
full-smile view at 1:3 magnification.

84 Spring 2016 Volume 32 Number 1

 Hu/Wang/Kuhns

Case 3: Single Posterior Restoration

A 45-year-old male presented with cracked tooth syndrome; an old mesial-
occlusal-buccal-lingual amalgam restoration on tooth #3 was leaking and had
recurrent caries. He eventually wanted to have all of the amalgam restorations
replaced. His maxillary right bicuspids were all natural virgin teeth, and he
wanted his molar restorations to blend in.
A shade was taken (Fig 13) and mapped (Fig 14) using the same process as
in the previous two cases. Because the affected tooth was a posterior molar, a
strong zirconia material (ZEUS Zirconia, MicroDental) was selected. Having the
correct shade information would enable optimization of esthetics into the full-
contour zirconia unit.
After cementation (Fig 15), the definitive restoration met the patients expec-
tations, and the shade match was digitally confirmed (Fig 16).

Figure 13: Case 3: Preoperative retracted view, shade-mapping Figure 14: Case 3: Preoperative digital shade map to verify the
#3. shade match of #3 to the adjacent #4.

Figure 16: Case 3: Postoperative digital shade map confirms

the shade match of the restoration.

Figure 15: Case 3: Postoperative retracted view of #3 to verify

shade matching.

Journal of Cosmetic Dentistry 85

Summary 11. Odaira C, Itoh S, Ishibashi K. Clinical evaluation of a dental color analysis system:
Using a technology-driven and laboratory-supported the Crystaleye Spectrophotometer. J Prosthodont Res. 2011 Oct;55(4):199-205.
process can help to simplify and streamline how den-
tal practices obtain and match shades for esthetic res- 12. Devigus A. A picture is worth. J Cosmetic Dent. 2012 Spring;28(1):82-8.
torations. The systematic approach described in this
article can help dental practice staff and the laboratory 13. Griffin JD. How to build a great relationship with the laboratory technician: sim-
to determine an accurate shade by removing many of plified and effective laboratory communications. Contemp Esthet. 2006:10(7):26-
the inherent variables that can lead to errors. The pro- 34. jCD
cess and protocol discussed can be easily integrated
and represent a reproducible and controlled method
for taking shades.

References Using a technology-driven and

1. Volpato CA, Monteiro S Jr, de Andrada MC, Fredel MC, Petter
laboratory-supported process can
CO. Optical influence of the type of illuminant, substrates and help to simplify and streamline how
thickness of ceramic materials. Dent Mater. 2009 Jan; 25(1):87- dental practices obtain and match
93. Epub 2008 Jul 7.
shades for esthetic restorations.
2. Mayekar SM. Shades of a color. Illusion or reality? Dent Clin
North Am. 2001 Jan;45(1):155-72, vii.

Dr. Hu maintains private practices in Anchorage and Soldotna, Alaska.

3. Ishikawa-Nagai S, Yoshida A, Sakai M, Kristiansen J, DaSilva JD.
Clinical evaluation of perceptibility of color differences between
natural teeth and all-ceramic crowns. J Dent. 2009; 37 Suppl
1:e57-63. Epub 2009 Apr 18.

4. Joiner A. Tooth colour: a review of the literature. J Dent. 2004;32

Suppl 1:3-12.
Ms. Wang is an intern at Dr. Hus practices.

5. Haddad HJ, Jakstat HA, Arnetzl G, Borbely J, Vichi A, Dumfahrt

H, et al. Does gender and experience influence shade matching
quality? J Dent. 2009; 37 Suppl 1:e40-4. Epub 2009 May 22.

6. Sing TS. The difficult is beautiful. J Cosmetic Dent. 2015 Win-

ter;30(4):26-36.
Dr. Kuhns holds a PhD in analytical chemistry from the University of
Washington.
7. Sikri VK. Color implications in dentistry. J Conserv Dent. 2010
Oct-Dec;13(4):249-55.

8. King AH. Shade guide lights: technical evaluation. USAF School

Disclosure: Dr. Kuhns is the senior director of product development
of Aerospace Medicine, USAFSAM-TP-88-14, AD-A206 513, p1-9,
and technical sales at MicroDental Laboratories, where the MicroShade
December 1988. process was developed.

9. Lammott LT. Going beyond the patients expectations. J Cosmetic

Dent. 2015 Winter;30(4):38-46.

10. Culic B, Prejmerean V, Gasparik C, Culic C, Dragos C, Dudea D.

In vitro evaluation of new dental software for shade matching.
Key Engineering Materials. 2014;587:360-5.

86 Spring 2016 Volume 32 Number 1

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Key Factors in Treatment Planning
for Complex Cases
Orthodontics as a Tool to Manage Severely Worn Dentitions

Dr. Gerard Chiche will present Esthetic Full-Mouth Rehabilitation on Saturday, April 30, at
AACD 2016 Toronto. In this course, he will outline the management of risk factors in a step-
by-step method to maximize long-term success of complete rehabilitation, as was done for the
complex case discussed in this article.

Alvaro Blasi, DDS, CDT

Gerard J. Chiche, DDS
Aram Torosian, MDC, CDT
Somkiat Aimplee, DDS, MSc
Jimmy Londono, DDS
Sergio R. Arias, DDS, MS

Abstract
Dentition that is worn from attrition or erosion presents many chal-
lenges. A comprehensive extraoral and intraoral examination should be
performed to collect necessary data to create a treatment plan. This ar-
ticle covers key intraoral parameters when dealing with these complex
cases. The case discussed illustrates an interdisciplinary plan to serve the
patients needs and expectations, and provide biological and functional
support for the final restorations.

Key Words: worn dentition, orthodontics, crowns, veneers, onlays

88 Spring 2016 Volume 32 Number 1

 Blasi/Chiche/Torosian/Aimplee/Londono/Arias

ent of adult
nta l treatm patie
de nts
The wit
hh
i gh

es
th
eti
ce
xpe
ctat
ions
can represent a chall
enge wh
ent
ey h

pr
es
i o n. en
ros wit t
r e hw
on o orn d
entition from attriti

Journal of Cosmetic Dentistry 89

Introduction Four Key Intraoral Parameters
The dental treatment of adult patients with high es- If the facial thirds and lip characteristics have been deemed to be within
thetic expectations can represent a challenge when pleasing and normal limits, the key elements that must be assessed for a
they present with worn dentition from attrition or proper diagnosis of intraoral features include cementoenamel junction
erosion. In addition, their typical chief complaint is (CEJ) location, root length and shape, tooth structure quantity and qual-
that their anterior teeth are too short.1-3 ity, and papilla level/contact length.
To successfully establish a correct diagnosis, the
clinical examination should begin with a comprehen- I. Parameters
sive extraoral examination followed by an intraoral A. CEJ location
examination. Once the data are accurately collected, a 1. Where is it in relation to the bone?
treatment plan can be formulated.4-6 2. Where is it in relation to the soft tissue?
The patients face should be evaluated with extra- B. Root length and shape
oral measurements, complemented with cephalomet- 1. Is there a favorable crown-to-root ratio?
ric radiographs and cone beam computed tomography 2. Is it round or triangular?
(CBCT). These data help to identify any craniofacial C. Tooth structure quantity and quality
abnormalities, such as vertical maxillary excess.7 Then 1. How much tooth structure is available?
the patients lip characteristics should be evaluated, 2. How much enamel or dentin is available and what quality is
including length and mobility and their relation to it?
the patients gender and age.8,9 D. Papilla level/contact length
Once the patients extraoral features have been 1. Papilla maxillary anterior teeth
examined, an intraoral examination should be per- a. central incisor (papilla should be 41% of the length of the
formed, consisting of clinical attachment level, prob- central incisor)
ing depth, and radiographic bone level. Diagnostic b. lateral incisor (papilla should be 41% of the length of the
tools include an explorer, periodontal probe, and lateral incisor)
radiographs to determine if the patient has excessive c. canine (papilla should be 43% of the length of the canine)
gingival display due to altered passive (gingival en- 2. Contact length maxillary anterior teeth
largement or pseudo pockets) or altered active erup- a. central incisor (mesial contact area should be 40% of the
tion. Finally, tooth size and shape should be measured length of the central incisor)
to determine how much tooth structure has been lost b. lateral incisor (mesial contact area should be 30% of the
due to attrition, abrasion, or erosion.10-14 length of the lateral incisor)
c. canine (mesial contact area should be 20% of the length
of the canine)

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CASE REPORT
A 61-year-old female wished to improve her smile and
ability to chew. She presented with a severely worn
dentition due to long-term intake of soda drinks, acid
reflux, and protrusive bruxism (Figs 1-3). She also had
severe headaches and the temporomandibular joint
load test was positive. Pulse oximeter data revealed no
signs of obstructive sleep apnea (Fig 4).
The patient was evaluated with oral measurements,
periapical radiographs, a CBCT, and a maxillary ante-
rior wax-up, and a mock-up with upper lip at rest was
completed (Figs 5-8). These data helped to identify
the following treatment plan and procedures:
1. Occlusal appliance therapy to determine the ap- Figure 1: Preoperative extraoral image. There is no display of maxillary anterior
propriate joint position, confirmed by comfort teeth and 3 mm display of mandibular anterior teeth. The patient has thin lips.
and negative load test (Figs 9a & 9b).
2. Orthodontic treatment to intrude maxillary and
mandibular incisors (Figs 10a & 10b).
3. Bonded temporary restorations to facilitate orth-
odontic therapy (Figs 11a-14d).
4. Connective tissue graft to improve soft tissue
(Figs 15a-15e).
5. After completion of the orthodontic treatment
(Figs 16a-16c), a CAD/CAM evaluation for
centric occlusion (CO) with an intraoral scanner
(3Shape North America; Warren, NJ) (Figs 17a-
17c) to determine the desired shade (Fig 18).
6. Creation of preparations with a minimally inva-
sive prosthetic procedure (MIPP)15 and a full-
contour wax-up where the occlusion was refined
(Figs 19-24c). Figure 2: Preoperative smile image. Reversed smile line showing excessive
7. Restorative treatment with bonded e.max crowns mandibular display. The maxillary lip is asymmetric.
veneers, and onlays (Ivoclar Vivadent; Amherst,
NY) (Figs 25 & 26).
8. Occlusal guard post-delivery.
This interdisciplinary plan not only improved the
patients ability to chew but also achieved her esthetic
desires. The final restorations in this complex case il-
lustrate an improved smile and met the patients wish-
es and hopes (Figs 27a-30b).

Figure 3: Preoperative intraoral image with severely worn dentition and edge-
to-edge occlusion. Some teeth are eroded and have minimum contact with
their antagonist. Maxillary and mandibular incisors are supererupted.

Journal of Cosmetic Dentistry 91

 Figure 4: Pulse oximeter data revealed no signs of obstructive sleep apnea.

Figure 5: To determine how much the maxillary incisors have supererupted, a line is drawn connecting the gingival
levels of canines. Normally, the gingival levels of the central incisors are expected to approximate this line.

a b

Figures 6a & 6b: Periapical radiographs displaying short and conical Figure 6c: The CBCT section is also used to evaluate the
shape roots of maxillary incisors. distance between the CEJ and the crestal alveolar bone:
It is 3 mm and it is also estimated that the facial enamel
thickness is 1.5 mm, with no enamel present on the lingual
aspect.

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 Blasi/Chiche/Torosian/Aimplee/Londono/Arias

Figure 7: Maxillary anterior wax-up based on ideal tooth proportions and lingual ramp design; due to the severely worn
dentition and its compensatory eruption, this lingual ramp design is critical for occlusal stability and prevention of
orthodontic relapse.

Figure 8: Evaluation of mock-up with the upper lip at rest.

During this mock-up stage, F and V sounds should
be evaluated. The maxillary incisal edge is esthetically
pleasing and the mandibular incisal edge level was deemed
satisfactory. To avoid incisal tooth reduction, it was decided
that the mandibular incisors would be intruded 1.5 mm.

The patients face should Figures 9a & 9b: Occlusal device fabricated to determine
the optimum joint position. Since the patient displayed a
be evaluated with extraoral positive load test, the mandible was repositioned anteriorly
measurements, complemented with to a comfortable position. The TMJs were evaluated at regular
intervals for six months until a final pain-free position was
cephalometric radiographs and cone determined for the final reconstruction.
beam computed tomography.

Journal of Cosmetic Dentistry 93

 a b

Figures 10a & 10b: Intrusion of maxillary and mandibular incisors. Treatment objectives included a pleasing gingival plane,
more conservative tooth preparations, and improved occlusion.

a b

c d

Figures 11a-11d: Direct composite restorations were fabricated during orthodontic treatment. They provided improved
communication of final tooth position for the orthodontist.

This interdisciplinary plan not only improved the patients ability to

chew but also achieved her esthetic desires.

94 Spring 2016 Volume 32 Number 1

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Figures 13a-13c: Comparative views of the preoperative

condition, orthodontic intrusion, and composite buildups.
b

Figures 12a-12c: Composite buildups were completed on the

maxillary and mandibular anterior teeth during the intrusion
process. The mandibular left central incisor was longer
incisally to guide the orthodontist for further intrusion of that
tooth.

Journal of Cosmetic Dentistry 95

 a

c d

Figures 14a-14d: Posterior indirect composites were bonded individually.

96 Spring 2016 Volume 32 Number 1

 Blasi/Chiche/Torosian/Aimplee/Londono/Arias

a b

c d

Figures 15a-15e: Connective tissue graft

e performed to improve soft tissue volume on
maxillary right lateral incisor.

Journal of Cosmetic Dentistry 97

 a

b c

Figures 16a-16c: Completion of the orthodontic treatment. Tooth proportions were enhanced along with stable CO and anterior guidance.

Based on these findings, an interdisciplinary plan can be devised to best serve

the patients needs and expectations and provide the optimum biological and
functional support for the final restorations.

98 Spring 2016 Volume 32 Number 1

 Blasi/Chiche/Torosian/Aimplee/Londono/Arias

a b

Figures 17a-17c: CAD/CAM evaluation of CO. It was decided to equalize the strength of the contacts in the anterior and posterior
teeth. The lingual ramp of maxillary anterior teeth is necessary to prevent subsequent extrusion of maxillary and mandibular
incisors.

Figure 18: The desired shade was determined before removing the composites in order to decide
on the depth of preparation and the material selection.

Journal of Cosmetic Dentistry 99

 Figure 19: The magnitude of the depth guides of the final preparations was based on the
expected shade of the restorative material.

Figure 20: Superimposition of the depth guides and the prepared teeth. The original incisal edges were left untouched.

100 Spring 2016 Volume 32 Number 1

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Figure 21: The MIPP technique allows for minimum tooth preparations: conservative full-coverage crowns on the maxillary anterior teeth,
porcelain veneers on the mandibular anterior teeth, and porcelain onlays on the posterior teeth.

Journal of Cosmetic Dentistry 101

 a b

Figures 22a-22c: The full-contour wax-up of the maxillary arch was based on
esthetic and functional objectives to provide a stable posterior occlusion.

b c

Figures 23a-23c: The full-contour wax-up of the mandibular arch was based on esthetic and functional objectives to provide a stable
posterior occlusion.

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a b

Figures 24a-24c: The occlusion was refined in the wax stage before
processing the pressed restorations.

Figure 25: Posterior onlays allow for conservative tooth preparation.

Journal of Cosmetic Dentistry 103

 Figure 26: Final intraoral image with lithium disilicate crowns pressed and stained. Shade A3 was selected
by the patient to maximize a natural appearance.

a b

Figures 27a & 27b: Preoperative and postoperative images of the challenging worn dentition case.

a b

Figures 28a & 28b: Preoperative and postoperative evaluation of the restorative maxillary treatment addressing the patient's concerns.

104 Spring 2016 Volume 32 Number 1

 Blasi/Chiche/Torosian/Aimplee/Londono/Arias

a b

Figures 29a & 29b: Preoperative and postoperative images showing the mandibular transformation.

a b

Figures 30a & 30b: Preoperative and postoperative images showing the completed treatment following the authors' key factors for
comprehensive cases.

Summary
Treatment-planning decisions for comprehensive cases
often involve selecting either surgical crown lengthening
or orthodontic intrusion or a combination of both. The
final selection depends upon the following key factors:
CEJ location
root length and shape
tooth structure quantity and quality
final papilla location and desired proximal contact
location.
In addition to the above intraoral parameters, the best
indicated type of restorative material (etchable or non-
etchable ceramics) and the preparation design also are
critical to success. Based on these findings, an interdis-
ciplinary plan can be devised to best serve the patients
needs and expectations and provide the optimum bio-
logical and functional support for the final restorations.

Journal of Cosmetic Dentistry 105

Acknowledgements 14. Stappert CF, Tarnow DP, Tan JH, Chu SJ, Proximal contact areas of
the maxillary anterior dentition. Int J Periodontics Restorative Dent.
The authors thank Dr. Eladio DeLeon (Augusta, GA) for the orthodon-
2010 Oct;30(5):471-7.
tics treatment performed on the case discussed in this article, and Dr.
Jae Seon Kim (Bellevue, WA), for his general guidance on this case. 15. Fradeani M, Barducci G, Bacherini L, Brennan M. Esthetic rehabili-
tation of a severely worn dentition with minimally invasive pros-
References thetic procedures (MIPP). Int J Periodontics Restorative Dent. 2012
Apr;32(2):135-47. jCD
1. Chiche GJ, Pinault A. Esthetics of anterior fixed prosthodontics. Quintessence
Pub.; 1994.

2. Aimplee S, Arias S, Kim JS, Torosian A, Blasi A, Chiche G. Pursuing conserva-

Dr. Blasi is an assistant adjunct professor, Oral Reha-
tive esthetics. An interdisciplinary treatment approach for minimally prepared
bilitation Department, at Augusta University Dental
porcelain laminate veneers. J Cosmetic Dent. 2015 Fall;31(3):52-62. College of Georgias Goldstein Center for Esthetic and
Implant Dentistry.
3. Chu SJ, Karabin S, Mistry S. Short tooth syndrome: diagnosis, etiology and
treatment Management. J Calif Dent Assoc. 2004 Feb;32(2):143-52.

4. Kois DE, Kois JC. Comprehensive risk-based diagnostically driven treatment

Dr. Chiche is the Thomas P. Hinman Endowed Chair in
planning: developing sequentially generated treatment. Dent Clin North Am. Restorative Dentistry and the director and a profes-
2015 Jul;59(3):593-608. sor at the Goldstein Center for Esthetic and Implant
Dentistry.
5. Coslet JG, Vandarsall R, Weisgold A. Diagnosis and classification of delayed
passive eruption of the dentogingival junction in the adult. Alpha Omegan.
1977 Dec;70(3):24-8.
Mr. Torosian is a master dental ceramist, laboratory
supervisor, and instructor at the Goldstein Center for
6. Spear FM, Kokich VG, Mathews DP. Interdisciplinary management of anterior
Esthetic and Implant Dentistry.
dental esthetics. J Am Dent Assoc. 2006 Feb;137(2):160-9.

7. Vanarsdall RL, Blasi I, Secchi AG. Periodontal-orthodontic interrelationships.

In: Graber TM, Vanarsdall RL, Vig KWL, Huang GJ, editors. Orthodontics: cur-
rent principles and techniques. 6th ed. St. Louis: Mosby. Forthcoming 2016. Dr. Aimplee is an assistant adjunct professor, Oral Re-
habilitation Department, at Augusta University Dental
8. Vig RG Brundo GC. The kinetics of anterior tooth display. J Prosthet Dent. 1978 College of Georgia. He is in private practice limited
to prosthodontics and esthetic dentistry in Bangkok,
May;39(5):502-4.
Thailand.

9. Tjan AH, Miller GD, The JG. Some esthetic factors in a smile. J Prosthet Dent.
1984 Jan;51(1):24-8.
Dr. Londono is an assistant professor, Removable and
10. Kois JC. Altering gingival levels: the restorative connection. Part I: biologic vari- Fixed Prosthodontics Department and a prosthodontist
on the Esthetics and Implant Faculty at Augusta Univer-
ables. J Esthet Dent. 1994 Jan;6(1):3-7.
sity Dental College of Georgia.

11. Robbins JW. Tissue management in restorative dentistry. Functional Esthet Re-
storative Dent. 2007:1(3):2-5. Available from: http://www.redrocksoralsurgery.
com/files/2014/03/Tissue-Management-in-Restorative-Dentistry.pdf
Dr. Arias is an assistant adjunct professor, Oral Reha-
bilitation Department, at Augusta University Dental
12. Chu SJ. Range and mean distribution frequency of individual tooth width of the
College of Georgia. He is in private practice limited to
maxillary anterior dentition. Pract Proced Aesthet Dent. 2007 May;19(4):209- prosthodontics and esthetic dentistry in Fort Lauder-
15. dale, Florida.

13. Chu SJ, Tarnow DP, Tan JH, Stappert CF. Papilla proportions in the maxillary
Disclosure: This work was supported by the Nobel
anterior dentition. Int J Periodontics Restorative Dent. 2009 Aug;29(4):385-93.
Biocare Center for Implant and Esthetic Dentistry at
Augusta University.

106 Spring 2016 Volume 32 Number 1

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 108 Spring 2016 Volume 32 Number 1
 Feraru/Musella/Bichacho

It is imperative that the restorative team be

able to correctly analyze smile deficiencies
and plan the required modificationsto
achieve an ideal smile.

Individualizing a
Smile Makeover
Current Strategies for Predictable Results

Mirela Feraru, DMD

Vincenzo Musella, DMD, MDT
Nitzan Bichacho, DMD

CE
CREDIT

Abstract Learning Objectives

The goals of esthetically oriented treatment in the smile zone
are to achieve harmony and dynamic symmetry of well-propor- After reading this article, the participant should be
tioned teeth correctly positioned in the arch, craft a balanced able to:
scalloping of the gingival line, and create/maintain a functional
and physiologic occlusion. Each restorative treatment in this
zone should begin with a functional wax-up, based on accumu- 1. Evaluate a nonorthodontic/nonsurgical
lated esthetic criteria, to guide the treatment team to the opti- restorative approach that conservatively
mal result. This article describes a nonorthodontic/nonsurgical delivers a beautiful and functional result.
restorative approach with digital esthetic planning and meticu-
lous, minimally invasive restorative treatment that enhanced a 2. Utilize a restorative mock-up to guide
smile in a predictable and controllable manner. workflow, correcting minor tooth
misalignment and shape irregularities.
Key Words: smile makeover, minimally invasive dentistry, Vis-
agism, monolithic veneers, mock-up, controllable workflow 3. Understand the advantages to be gained
by using the Visagism concept and relevant
software programs.

Journal of Cosmetic Dentistry 109

Introduction
Principles of a pleasing smile have been described in
the dental literature by numerous authors who sug-
gest various parameters for optimal facial and dental
composition.1-9 These parameters recently have been
combined with concepts such as Visagism10 and dig-
ital software programs such as Digital Smile Design
(DSD)11 and Visagismile.10 Parameters that were sug-
gested for implant restoration assessment, such as the
pink and white esthetic scores,12,13 can be partially
implemented in smile analyses of pre- and postopera-
tive treatment of natural teeth. It is imperative that the Figure 1: Preoperative
restorative team be able to correctly analyze smile de- facial view. The patient was
ficiencies and plan the required modificationsutiliz- unhappy about the color
ing suitable treatment modalitiesto achieve an ideal mismatch of her restored
smile. However, such ideal results might also require central incisors. It is obvious
nonrestorative treatment steps such as orthodontic that there are some additional
factors contributing to her
tooth relocation and/or gingival surgical intervention.
smiles unesthetic appearance.
The treatment team must explain the implications to
the patient so he or she can decide whether to accept
all the steps needed to obtain an ideal smile or decline
the additional treatments in favor of an optimal (but
non-ideal) result that will still satisfy their expecta-
tions.
This article discusses a case in which a restorative-
only approach achieved an optimal result based on a
combination of classic esthetic parameters and mod-
ern smile analysis concepts and technology.

Case Presentation
A 36-year-old woman presented to the office, unhappy
with her unesthetic smile (Fig 1). Her main concern
was the color discrepancy between the old compos-
ite restorations at the two maxillary central incisors
(Fig 2).
As with any esthetic rehabilitation in the smile
zone, a series of photographic images was taken as Figure 2: The gingival margins of the front maxillary teeth are not even.
a first step to guide the team through the treatment Note also the small lateral incisors, interdental spaces, and the canting of
plan and also to serve as an efficient communication the teeth that create an unparallel incisal line with the lower lip.
tool with the patient. Full-face and intraoral images
were taken along with polyvinyl siloxane (PVS) im-
pressions for accurate study models. Based on these
data, an analysis of her smile (the teeth and the sur-
rounding soft tissues) revealed several additional fac-
tors contributing to its non-harmonious appearance:
relatively small lateral incisors, asymmetric gingival
margins and different shape and color of the central
incisors, spaces between the lateral incisors and cen-
trals and different angulations between them, and a
clockwise tilting of the anterior teeth and canting of
their incisal line (Figs 2 & 3).
Figure 3: The gingival line of #9 is positioned coronally, therefore it is
shorter than #8 and their overall shape is deficient. The darker color of the
old restorations is noticeable, as is their incisal wear.

110 Spring 2016 Volume 32 Number 1

 Feraru/Musella/Bichacho

Treatment Objectives First Mock-Up as a Diagnostic and Motivational Tool

The objectives of the treatmentto achieve a natu- The first intraoral additive mock-up was based on the diagnostic wax-up.
ral, pleasing smile by designing a balanced gingival A self-curing composite material (Luxatemp, DMG America; Englewood,
outline and a proper shape and proportions for the NJ) was injected into the silicone key and inserted on the unprepared
anterior teethwere set collaboratively with the pa- teeth, which were isolated with paraffin wax to facilitate easy removal
tient. The main esthetic challenge of such a case is to (Fig 9). This first mock-up also serves as a motivational and communica-
choose suitable shapes for the anterior teeth that will tion tool with the patient, showing and explaining all the changes that
integrate with the patients facial esthetics as well as can be made, as well as the desired final outcome. New full-face and intra-
with his or her individual personality.10 oral photographic and video images were recorded in a sequence similar
to the preoperative images. The desired changes were shown, explained,
Visagism and discussed with the patient by comparing the relevant before-and-af-
Nonverbal communicationharmony of the smile ter mock-up videos and images (Figs 10 & 11). The patient accepted the
with the facial estheticsis the primary area of study treatment and the following steps were planned:
in Visagism.10 Due to their prominent position, the 1. oral hygiene appointments until excellent oral hygiene was main-
maxillary central incisors are the most important ele- tained
ment to be studied. The initial consultation involves 2. replacement of the old composite restorations
an analysis of the face and completion of a question- 3. home bleaching for a period of 3 weeks (1 hour/day 22% carbamide
naire to determine the patients dominant tempera- peroxide)
ments so the treatment team can formulate a treat- 4. mock-up-guided preparation, impression, and provisional restora-
ment plan assisted by the Visagism concept.10 tions
The four basic temperaments can be classified as: 5. bonding of the ceramic restorations
--choleric/strong 6. periodical recalls.
--sanguine/dynamic The patient declined a traditional surgical crown lengthening of #9
--melancholic/sensitive as the length difference between the central incisors was not visibly pro-
--phlegmatic/calm (Fig 4).10 nounced at function. However, she did accept a minimal adjustment of
An in-depth clinical analysis and a patient inter- the tooths free gingival margin.
view are crucial in determining which specific tooth Following replacement of the old composite restorations
forms most accurately reflect the patients personality. (Figs 12a & 12b), home bleaching, and the return of soft tissue health
Based on the patient questionnaire and interview, through proper hygiene, the treatment could continue with preparation
Visagismile software for personalized smile design of the four anterior teeth for ceramic restorations.
(Visagismile Inc.; Sofia, Bulgaria) indicated that this
patient showed more dynamic and delicate charac-
teristics, which are expressed in triangular/oval tooth
shapes (Figs 5-7). Relevant images were sent to the
dental laboratory along with guidelines for the sug-
gested design of the four anterior teeth.
The dental technician created a diagnostic additive
wax-up that included the desired modifications: even
the gingival outline by correcting the gingival margin The main esthetic challengeis
of #9, enlarge the lateral incisors, correct the propor- to choose suitable shapes for the
tions of the four incisors, and close the spaces between
the lateral and central incisors (Fig 8). The new design
anterior teeth that will integrate
was in line with the Visagism guidelines.10 Blueprint- with the patients facial esthetics
ing the wax-up, the dental technician provided a trans- as well as with his or her individual
parent silicone template (visio.sil ILT, Bredent Medical
GmbH & Co. KG; Senden, Germany) prepared under
personality.
pressure. It is important that the silicone template fit
precisely to obtain a well-fitting, accurate mock-up.

Journal of Cosmetic Dentistry 111

 Figure 4: Guidelines for different forms of the maxillary anterior teeth related to the four basic characteristics of human temperament.

Figure 5: The computer software determines facial characteristics and their correlation to the patients temperament.

Figure 6: The recommended teeth shapes after evaluation and integration of the patients questionnaire and digital facial analysis. In this
case, dynamic and delicate shapes were suggested in the form of triangular/oval outlines with rounded incisal edges.

112 Spring 2016 Volume 32 Number 1

 Feraru/Musella/Bichacho

Figure 7: Frontal view superimposition of the software design of the suggested shape on the anterior teeth.

Figure 8: Additive wax-up of the four maxillary incisors. Figure 9: Wax-up checked intraorally via a mock-up with a
transparent silicone template and a self-cure composite resin.

Figure 11: Mock-up; close-up frontal view.

Figure 10: Facial view of the patient with

the mock-up try-in.

Journal of Cosmetic Dentistry 113

 Figure 12a: The defective composite resin restorations at #8 and #9 were Figure 12b: Radiograph after replacement of
replaced before preparation. the defective resin composite restorations
and before the preparation phase. The new
restorations will be included within the
porcelain laminate veneer preparations.
Second Mock-Up as a Preparation Guide
A second mock-up was placed to serve as a prosthetic and sur-
gical preparation guide (Fig 13)14 in order to remove as little
tooth structure as possible. The wax-up design allowed us to
confine the preparations almost entirely within the enamel.
Guiding burs (0.3 mm PR12, Strauss & Co.; Raanana, Israel)
were used for the initial preparation (Fig 14), followed by
overall light chamfer reduction.15 After the initial prepara-
tion was completed, the soft tissue contours were addressed.
A minor gingivectomy was performed on #9 with a diode laser
(Opus 10, Lumenis; Yokneam, Israel) (Fig 15) to balance the
gingival outline of the two central incisors. The more coronal Figure 13: Mock-up as a prosthetic and surgical preparation
position of the gingival margin on #9 (due to the anatomi- guide for the four maxillary incisors.
cal mesiobuccal groove) could be superficially addressed to
create a confluence shape, although more coronally than the
contralateral tooth. The preparation margin in the areas where
spaces were to be closed (between the central and lateral inci-
sor) was intracrevicular.16
Shallow chamfers (0.2 mm) were created supragingival to
the facial aspect of the prepared teeth under 6x magnification.
At the interproximal areas, the intrasulcular margins were de-
fined beyond the contact point to create a proper emergence
profile and enable support for the papilla at the future restora-
tions (Figs 16-18). The use of high magnification (6x loupes
and/or microscope) helps to achieve precision and control
during the preparation phase as well as later on during the
bonding procedure. Figure 14: The
The preparations were finished with chamfer burs (Red- initial facial and
Line; Plymouth, MN) and silicone polishing points, both incisal preparations
impregnated (Enhance, Dentsply; York, PA) and nonimpreg- ensure minimal
tooth reduction and
nated (Opticlean, Kerr; Orange, CA). Due to the preparation
maximum enamel
margins superficial position, placement of a single cord for preservation.
impression taking (Figs 19a & 19b) was sufficient to ensure

114 Spring 2016 Volume 32 Number 1

 Feraru/Musella/Bichacho

Figure 15: A focused gingivectomy with Figures 16 & 17: Final preparations; the margins where spaces were to be closed are
diode laser on the gingival mesial aspect intrasulcular and beyond the contact point, to support the adjacent papilla through the
of #9 was performed after the initial tooth future restorations.
reduction.

Figure 18: Incisal view of the prepared teeth (mirror image). Note the mesiobuccal grove of #9 and the controlled minimal
reduction for maximum tooth structure preservation.

Figure 19a: A single retraction

Figure 19b: Incisal view of prepared teeth with retraction cords in place.
cord ensures an efficient
retraction and deflection of
the soft tissue for a precise
impression.

Journal of Cosmetic Dentistry 115

an effective deflection of the surrounding soft
tissues for a perfect registration. A one-stage PVS
impression was made (Fig 19c). The impression
was sent with the reference color guide images to
the laboratory technician (V.M.) for fabrication
of the lithium disilicate ceramic restorations.
Provisional restorations were fabricated chair-
side and provided to the patient using the same
transparent silicone template that was used for
the mock-up. A self-cure composite material
(Luxatemp) was injected into the silicone tem-
plate (Figs 20a & 20b) and the spot-etch tech-
nique was used to bond the provisional restora- Figure 19c: Traditional elastomeric registration of prepared teeth with a one-
tions,17 as the very thin provisional veneers were phase impression technique.
to be in function for a period of a few weeks.
The definitive ceramic restorations were artisti-
cally produced as a blueprint of the wax-up on a
Geller model18 (Fig 21).
The four pressed, externally stained mono-
lithic lithium disilicate restorations (e.max, Ivo-
clar Vivadent; Amherst, NY) were checked intra-
orally; verified for perfect occlusal, marginal fit,
and esthetic integration; and conditioned for
bonding (Figs 22a-22c). A one-bottle system
(Etch & Prime, Ivoclar Vivadent) was used to con-
dition the ceramic restorations. Conditioning of
the teeth and the bonding procedure were done
according to the classic protocol for adhesion19
(etching, bonding, and luting cement [Variolink
Esthetic, Ivoclar Vivadent]). The entire procedure
was performed under high magnification (OPMI
pico, Carl Zeiss Meditec; Dublin, CA) and rubber Figure 20a: Composite resin splinted provisional restorations were created
dam isolation. using the same transparent silicone template that had served for the mock-up.
The restorations blended inconspicuously
with the adjacent teeth with comfort, function,
and undisturbed phonetics. The gingiva mani-
fested an uneventful, advanced stage of healthy
maturation. The overall esthetic improvement
due to the correctly proportioned and individu-
ally matched shapes was significant from all
viewing angles (Figs 23a & 23b). Integration of
the restorations at every level was evident at the
eight-month recall appointment (Figs 24a-25c).

Relevant images were sent

to the dental laboratory
along with guidelines for the
Figure 20b: At four weeks of function of the provisional restorations, before
suggested design of the four ceramic veneer bonding.
anterior teeth.

116 Spring 2016 Volume 32 Number 1

 Feraru/Musella/Bichacho

Figure 21: The master Geller model. Note that the gingival Figure 22a: Four pressed, monolithic lithium disilicate restorations were
margins at the plaster are apically dislocated due to the created as a copy of the wax-up.
retraction cords.

Figure 22b: The stained and glazed lithium disilicate Figure 22c: A 0.2 to 0.3 mm average thickness of the restorations
restorations on the working model. will restore the space between the minimally prepared teeth and the
envelope of design.

Figures 23a & 23b: Semi-profile views

of the patient when smiling with the
definitive restorations, after bonding.

Journal of Cosmetic Dentistry 117

 Discussion
Although numerous parameters for harmoni-
ously proportioned and arranged teeth have
been identified,1-9 the final decisions about
redesigning a smile traditionally have been
dependent on the experiences and talents of
the treatment team.20 More recently however,
additional guidelines have proposed a better
match of tooth shape and size to the individu-
al patient based on his or her unique physical
and emotional characteristics.10,11 Combining
these guidelines with the classic esthetic pa-
rameters can enhance the smile design op-
tions offered to patients. The design is then
implemented on a wax-up (or several wax-ups
if more than one design is considered). Via
a silicone template, the wax-up guides a pre-
operative mock-up to be evaluated, modified
intraorally if necessary, and confirmed. The
same type of mock-up later guides the mini-
mally invasive preparation of the teeth, as
well as possible adjunctive treatments such as
periodontal surgeries and orthodontic reloca-
tion. In indicated cases, a thin buccal layer of
the monolithic restoration can be cut back to
Figures 24a & 24b: At the eight-month recall. The esthetic improvement allow minimal ceramic layering for enhanced
following the treatment is obvious compared with the preoperative situation. appearance when the overall form has already
Note the harmonious integration of the bonded ceramic veneers with the been established.
surrounding soft tissue, as well as the correct proportions between the four
anterior teeth. Summary
The modern approach to smile design is more
effectively controlled through data collection,
digital smile design tools, and all the treat-
ment steps up to fabrication of the definitive
restorations. Current esthetic software pro-
grams such as Visagismile and DSD can be
powerful tools in assessing and modifying the
design of deficient smiles. Utilizing these digi-
tal tools together with classic treatment-plan-
ning rules and principles21,22 helps to facilitate
a controlled and predictable treatment when
redesigning a smile. Furthermore, the three-
dimensional digital design assisted by the
Visagism concept10 leads to a more conserva-
tive preparation approach and can accurately
guide adjunctive treatments that modify the
tissue levels (mucogingival surgery) and tooth
positioning (orthodontic treatment).
Figures 25a-25c: Eight-month recall appointment: A radiographic control Meticulous execution of the clinical steps,
manifests the perfect adaptation of the lithium disilicate restorations with the under proper magnification and based on an
abutment teeth. accurate, individualized design, should lead
to a controllable workflow and a healthy,
long-lasting, esthetic new smile

118 Spring 2016 Volume 32 Number 1

 Feraru/Musella/Bichacho

References 14. Grel G. Porcelain laminate veneers: minimal tooth preparation by design. Dent Clin
North Am. 2007 Apr;51(2):419-31.
1. Dawson PE. Functional occlusion: from TMJ to smile design. St.
Louis: Mosby; 2006. 15. Bichacho N. Porcelain laminate veneers. Part 1: preparation techniques. Israel J Dent
Technol. 1994;3:54-9.
2. Chiche G, Pinault A. Esthetics of anterior fixed prosthodontics.
1st ed. Hanover Park (IL): Quintessence Pub.; 1994. 16. Bichacho N. The frontal spaced dentitiondifferent prosthetic treatment modalities. J
Israeli Orthod Soc. 1995;3:7-14.
3. Fradeani M. Esthetic rehabilitation in fixed prosthodontics, Vol-
ume 1. Esthetic analysis: a systematic approach to prosthetic 17. Grel G, Bichacho N. Permanent diagnostic provisional restorations for predictable re-
treatment. Hanover Park (IL): Quintessence Pub.; 2004. sults when redesigning the smile. Pract Proced Aesthet Dent. 2006 Jun;18(5):281-6.

4. Lombardi RE. The principles of visual perception and their 18. McLaren EA, Chang YY. Creating physiologic contours using a modified Geller cast tech-
clinical application to denture esthetics. J Prosthet Dent. 1973 nique. Inside Dent. 2007 Oct;3(9):88-91.
Apr;29(4):358-82.
19. Mangani F, Putignano A, Cerutti A. Guidelines for Adhesive dentistry: the key to success.
5. Levin EI. Dental esthetics and the golden proportion. J Prosthet Hanover Park (IL): Quintessence Pub.; 2009
Dent. 1978 Sep;40(3):244-52.
20. Bichacho N, Magne M. Controlled restorative treatment of compromised anterior denti-
6. Rufenacht CR. Fundamentals of esthetics. Hanover Park (IL): tion. Pract Proced Aesthet Dent. 1998 Aug;10:723-6.
Quintessence Pub.; 1990.
21. Grel G. The science and art of porcelain laminate veneers. Hanover Park (IL): Quintes-
7. Adolfi D. Natural esthetics. Hanover Park (IL): Quintessence sence Pub.; 2003.
Pub.; 2002.
22. Bichacho N. Porcelain laminates: integrated concepts in treating diverse aesthetic defects.
8. Ahmad I. A clinical guide to anterior dental aesthetics. London: Pract Proced Aesthet Dent. 1995 Apr:7(3):13-23. jCD
British Dental Association; 2005.

9. Calamia JR, Wolff MS, Simonsen RJ. Succesful esthetic and cos-
metic dentistry for the modern dental practice. Dent Clin North Current esthetic software
Am. 2007;51(2):281-571.
programscan be powerful tools
10. Paolucci B, Calamita M, Coachman C, Grel G, Shayder A,
in assessing and modifying the
Hallawell P. Visagism: the art of dental composition. QDT design of deficient smiles.
2012;35:187-201.

11. Coachman C, Calamita M. Digital Smile Design: a tool for treat- Dr. Feraru is a team member at the Bichacho Clinic in Tel Aviv, Israel,
ment planning and communication in esthetic dentistry. QDT and an affiliate of the European Academy of Esthetic Dentistry.
2012. Hanover Park (IL): Quintessence Pub.; 2012. p.103-12.

12. Frhauser R, Florescu D, Benesch T, Haas R, Mailath G, Watzek G.

Evaluation of soft tissue around single-tooth implant crowns: the
pink esthetic score. Clin Oral Implants Res. 2005 Dec;16(6):639- Dr. Musella is a practicing dentist and technician. He is the founder of
44. the Aesthetic Dental Full HD Annual Symposia in Modena, Italy.

13. Belser UC, Grtter L, Vailati F, Bornstein MM, Weber HP, Buser
D. Outcome evaluation of early placed maxillary anterior single-
tooth implants using objective esthetic criteria: a cross-sectional,
retrospective study in 45 patients with a 2- to 4-year follow-
Prof. Bichacho is head of the Ronald E. Goldstein Center for Esthetic
up using pink and white esthetic scores. J Periodontol. 2009 Dentistry, Hadassah Medical Campus, Hebrew University, Jerusalem.
Jan;80(1):140-51. He is a past president and life member of the European Academy of
Estheric Dentistry and owns a private practice in Tel Aviv, Israel.

Disclosures: The authors did not report any disclosures.

Journal of Cosmetic Dentistry 119

 AACD Self-Instruction CE
CREDIT

Continuing 3 Hours Credit

Education Information
General Information Verification of Participation (VOP)
This continuing education (CE) self-instruction pro- VOP will be sent to AACD members via their My-
gram has been developed by the American Academy AACD account upon pass completion. Log into
of Cosmetic Dentistry (AACD) and an advisory com- www.aacd.com to sign into your MyAACD account.
mittee of the Journal of Cosmetic Dentistry. For members of the Academy of General Dentistry
(AGD): The AACD will send the AGD proof of your
Eligibility and Cost credits earned on a monthly basis. To do this, AACD
The exam is free of charge and is intended for and must have your AGD member number on file. Be
available to AACD members only. It is the responsi- sure to update your AGD member number in your
bility of each participant to contact his or her state AACD member profile on MyAACD.com.
board for its requirements regarding acceptance of All participants are responsible for sending proof
CE credits. The AACD designates this activity for 3 of earned CE credits to their state dental board or
continuing education credits. agency for licensure purposes.

Testing and CE Disclaimer

The self-instruction exam comprises 10 multiple- AACDs self-instruction exams may not provide
choice questions. To receive course credit, AACD enough comprehensive information for participants
members must complete and submit the exam and to implement into practice. It is recommended that
answer at least 70% of the questions correctly. Par- participants seek additional information as required.
ticipants will receive tests results immediately after The AACD Self-Instruction Program adheres to the
taking the examination online and can only take guidelines set forth by the American Dental Asso-
each exam once. The exam is scored automatically by ciation Continuing Education Recognition Program
the AACDs online testing component. The deadline (CERP), and the AGD Program Approval for Con-
for completed exams is one calendar year from the tinuing Education (PACE). Exams will be available
publication date of the issue in which the exam ap- for a maximum of 3 years from publication date.
peared. The exam is available online at www.aacd.
com. A current web browser is necessary to complete Questions and Feedback
the exam; no special software is needed. For questions regarding a specific course, informa-
Note: Although the AACD grants these CE credits, tion regarding your CE credits, or to give feedback on
it is up to the receiving governing body to determine a CE self-instruction exam, please contact the AACD
the amount of CE credits they will accept and grant Executive Office by e-mailing info@aacd.com or by
to participants. calling 800.543.9220 or 608.222.8583.

ADA CERP is a service of the American Dental Association to assist dental

professionals in identifying quality providers of continuing dental education.
ADA CERP does not approve or endorse individual courses or instructors,
nor does it imply acceptance of credit hours by boards of dentistry. AACD
designates this activity for 3 continuing education credits. Concerns or
complaints about a CE provider may be directed to the provider or to ADA
CERP at www.ada.org/goto/cerp.

120 Spring 2016 Volume 32 Number 1

 (CE) Exercise No. jCD24

Esthetics/Cosmetic Dentistry AGD Subject Code: 780

The 10 multiple-choice questions for this Continuing Education (CE) self-instruction exam are based on the article, Individual-
izing a Smile Makeover, by Dr. Mirela Feraru, Dr. Vincenzo Musella, and Dr. Nitzan Bichacho. This article appears on pages 108-119.
The examination is free of charge and available to AACD members only, and will be available for 3 years after publication.
AACD members must log onto www.aacd.com to take the exam. Note that only Questions 1 through 5 appear in the printed
and digital versions of the jCD; they are for readers information only. The complete, official self-instruction exam is available
online onlycompleted exams submitted any other way will not be accepted or processed. A current web browser is necessary to
complete the exam; no special software is needed. The AACD is a recognized credit provider for the Academy of General Dentistry,
American Dental Association, and National Association of Dental Laboratories. For any questions regarding this self-instruction
exam, call the AACD at 800.543.9220 or 608.222.8583.

1. In the case presented, which of the following was completed 4. In terms of smile design for the case presented, the most impor-
prior to beginning restorative treatment? tant esthetic principle to correct is which of the following?

a. periodontal treatment including deep scales and gingival curet- a. the discrepancy in the gingival position in the area of the lateral
tage incisors
b. a functional esthetic wax-up based on accumulated esthetic b. the discrepancy in the gingival position in the area of the central
criteria to guide the treatment team incisors
c. orthodontic treatment to improve alignment and minimize tooth c. the inappropriate cant, size, and shape of the upper incisors
preparation d. the discrepancy in length of the lateral incisors
d. TMJ therapy including the use of directive splints
5. The purpose of the patient questionnaire discussed in this article
2. What is the primary issue in the study of Visagism? was to

a. nonverbal communication harmony of the smile with the a. document the patients smile design goals
facial esthetics b. evaluate the patients health history
b. nonverbal communication harmony of the teeth with the oral c. document the advantages of esthetic smile enhancement
musculature d. determine the patients dominant temperament characteristics
c. verbal communication harmony between the patients per-
sonality characteristics and the soft tissue display during smiling
d. verbal communication harmony between the patients per-
sonality and the dominance of the lateral incisors and canines To see and take the complete exam, log onto
www.aacd.com/jcdce
3. Parameters for implant restorations such as the pink and white
esthetic scores

a. are not really applicable to the principles of a pleasing smile

with natural teeth
b. are useful only before treatment of natural teeth
c. are useful only after treatment of natural teeth
d. can be partially implemented in smile analyses both before and
after treatment

Journal of Cosmetic Dentistry 121

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