Temporization

Batch
24
 Provisional (Temporary) Restorations
Between the time that the tooth is prepared and
the final crown restoration is delivered, it is
important that the patient should be comfortable
and the tooth should be protected and stabilized
with an adequate temporary restoration

Defined: Crown or bridge restorations that are

used in fixed prosthodontics during the interim
between tooth preparation and final placement of
definitive (permanent) crown or bridge
restorations.
Synonyms

Temporization, interim
To protect the prepared tooth
prosthesis, provisional
and Pulpal protection,
prosthesis.
Positional stability, Occlusal
Why provisional function, Ease of cleaning,
restoration needed? Marginal accuracy, Wear
resistance, Strength,
Esthetics and kept patient
comfortable.
Provisional restoration is
given for a period of time
until a permanent arrangement
can be made.
By successful
treatment with
provisional
restoration The patient spends a long
time in the clinic, and
this time should not be
Dentist can get the patient
wasted, as the procedure is
confidence which is an
carried out while the
influencing factor for
patient is present and
success in the final
during the same appointment
restoration.
in which the teeth are
Failure in this process
prepared.
ultimately leads to a loss of
Therefore, an acceptable
more time than what was
restoration must be
initially thought to be
provided.
saved.
 BIOLOGICAL REQUIREMENTS
PULP PROTECTION
Dentinal tubules exposed _during tooth
preparation.
Provisional restoration _should protect the
prepared tooth form oral environment, thereby
prevention sensitivity and irritation to pulp.

PERIODONTAL HEALTHY
lt should have good marginal fit, proper
contour & smooth surface to prevent
accumulation of food debris & facilitate easy
plaque removal.
 BIOLOGICAL REQUIREMENTS
POSITIONAL STABILITY
It should provide comfortable & stable
functional occlusal relationship by
maintaining interarch and intra-arch
stability thereby prevention tooth migration
and supra eruption

PREVENTION OF FRACTURE
lt should protect the prepared tooth surface
form fracture.
In partial coverage restoration in which
margin of preparation is close to occlusal
surface of tooth can be damaged during
mastication.
 MECHANICAL REQUIREMENTS

FUNCTIONAL
It should possess good compressive
& flexural strength.
The greatest stresses in provisional
restoration occurs during chewing.

RETENTION
It should have Coles adaptation to
the prepared tooth surface to
prevent displacement & re-
cementation.
 ESTHETIC REQUIREMENTS

Is should match the size, color, shape and texture of the restored
tooth especially in anterior region.
Color stability is also important if the provisional restoration are
to function for a prolonged period.
Sever as a guide to achieve esthetics to the final restoration.
The appearance of a provisional restoration is particularly
important for incisors, canines, and sometimes premolars.
Materials Used for
Temporary Crowns
1.Acrylic Resin
a.Polymethyl Methacrylate (PMMA) –
Most Common
• Advantages:

These materials are similar to those

- Easy to manipulate and repaired
used for complete dentures but are
shaded with tooth colored pigments
- Cost-effective
instead of pink.

• Disadvantages:
• Classification According to
Polymerization:
- High polymerization shrinkage
- Cold Cure (Direct)
- Low fracture resistance
-- Heat Cure (Indirect)
- Pulpal irritation associated with
excess monomer
Materials Used for
Temporary Crowns
1.Acrylic Resin
b. Polyethyl Methacrylate (PEMA)

- Softer composition compared to PMMA

- Less likely to fracture

- Used when the temporary crown will

not be in place for a long time

- Suitable for inflamed or sensitive

tissues or post-surgical procedures
due to reduced tissue irritation
compared to PMMA
Materials Used for
Temporary Crowns •Disadvantages:

2. Bis-Acryl Composite - More expensive than acrylic

•Advantages: - Less flexibility

- Better dimensional stability than - Brittle

acrylic

- More esthetic

- Minimal polymerization shrinkage

- More comfortable for both dentist

and patient
Materials Used for
Temporary Crowns
3. Composite Resins (Used in
Esthetic Cases)
•Advantages:

- Highly esthetic

- Easy to shape

- Quick setting

•Disadvantages:

- Long-term durability

- Sensitive to moisture
Materials Used for
Temporary Crowns
4. Fiber-Reinforced
Composite

- Fibers are added to

increase strength,
especially for long-span
areas or areas exposed to
high masticatory forces
Materials Used for
Temporary Crowns
5. Polycarbonate Crowns

•Advantages:

- Esthetic

- Easy to use

- Good fit

•Disadvantages:

- Limited strength and rigidity

Materials Used for
Temporary Crowns
6. 3D-Printed Resins
•Advantages:

- High precision

- Good durability

- Fast production

•Disadvantages:

- High cost

- Requires specialized equipment

- Material limitations
Techniques
 Dental Cement

is used to connect a fixed

prosthesis, such as a
crown or bridge, to the
underlying tooth
structure.
Dental cements can be classified as Types of temporary cement:
either permanent or temporary. Zinc Oxide Eugenol (ZOE) Cement
The ideal properties of a dental
Zinc oxide eugenol cement (ZOE) is an oil-
cement include: based cement used primarily as a temporary
dental cement. ZOE has an anti-inflammatory
● Non-irritating to the dental pulp effect on the pulp and is especially useful for
● High tensile and compressive strength cementation on prepared teeth with exposed
● Adheres to tooth structure dentinal tubules.
Advantages
● Minimal film thickness (ideally 25
● Soothes pulp
microns) ● Good sealing ability
● Seals margins ● Neutral PH
● Good natural tooth like aesthetics ● Least technique sensitive dental cement
● Low solubility in mouth fluids Disadvantages
● Easy to use ● Brittle (weakest cement)
● Eugenol inhibits polymerization of resin so
● Optimal working and setting time
should be avoided if final restoration is resin-
● Not too expensive based
● Most soluble cement in mouth fluids
● Low strength
Types of temporary cement:
Zinc Oxide Eugenol (ZOE) Cement
Disadvantages
● Brittle (weakest cement)
● Eugenol inhibits polymerization of resin so
should be avoided if final restoration is resin-
based
● Most soluble cement in mouth fluids
● Low strength
Types of temporary cement:
Zinc Phosphate Cement
Zinc phosphate cement has the longest
history of all the dental cements and still the
preferred choice for many dentists. The
cement does not have a chemical bond to the
underlying tooth structure
Advantages
● Long clinical history
● Low cost
● Excess material is easily removed
● Low film thickness
● High compressive strength
Disadvantages
● High acidity can cause pulpal irritation
● Exothermic (technique sensitive)
● Weak aesthetics
● Soluble in mouth fluids
● No chemical adhesion
Types of temporary cement:
Zinc Polycarboxylate Cement

Zinc polycarboxylate was the first dental cement

with the ability to chemically bond to the tooth
surface
Advantages
● Minimal pupal irritation
● Chemical adhesion to tooth
● Easy to manipulate
● Antibacterial
● Low film thickness (similar to zinc phosphate)
● Some can release fluoride
Disadvantages
● Short mixing/working times
● Lower compressive strength than zinc
phosphate cement
● Soluble in mouth fluids
Types of temporary cement:
Free eugenol cement
also known as non-eugenol cement, is a type of - These products are slightly more rigid, hold
dental cement that does not contain eugenol restorations better, and clean up is easier than
Characteristics the original formulas.

- No eugenol: Free eugenol cement does not Gentle on oral tissues, Smooth, consistent
contain eugenol, making it a suitable option for texture makes it easy to use ,easy removal,
patients who are sensitive or allergic to eugenol. reducing the risk of damage to the tooth or
restoration.
- Alternative to ZOE: Free eugenol cement can
be used as an alternative to zinc oxide-eugenol Composition:
Zinc oxide: providing good sealing properties
(ZOE) cement in certain applications. Polymer or resin: enhance bonding and sealing
- Similar properties: Free eugenol cement has properties.
similar properties to ZOE cement, including Other additives: Calcium phosphate , Calcium
good sealing properties and biocompatibility. hydroxide , Antimicrobial agents , Pigments or
colorants,
Types of temporary cement:
Free eugenol cement
Examples: Cavex Temporary Cement Examples: Temp Bond
Types of temporary cement:
Free eugenol cement
Examples: Hy bond Examples: Rely x
Types of temporary cement:
Setting time
Free eugenol cement Eugenol based cement
Examples: Auto-mix syringe - ZOE : 2-5 minutes
- Zinc Phosphate Cement : 5-7 minutes
- Zinc Polycarboxylate Cement : 2-4 minutes
Non-eugenol cement
- Cavex Temporary Cement : 2-5 minutes
- Temp Bond cement: 2-4 minutes
- RelyX Temp NE : 2-5 minutes

Factors Affecting Setting Time Temperature

Humidity Mixing ratio

It's essential to follow the manufacturer's

instructions for the specific product being
used, as the setting time and mixing ratio may
vary. This ensures optimal results and
minimizes potential complications.

Cementation
 Managing and maintaining
provisional restorations:
Provisional Restoration Management
1. Monitoring: Regularly check for signs of
wear, fracture, or loosening. This helps identify
issues early and prevents complications.

2. Adjustments: Make necessary adjustments to

ensure proper occlusion and patient comfort.
This may include refining the bite or smoothing
rough edges.

3. Oral Hygiene: Educate the patient on proper

oral hygiene practices, such as gentle brushing
and flossing around the provisional restoration.
 Managing and maintaining
provisional restorations:
Maintenance
1. Regular Check-ups: Schedule regular
appointments to assess the provisional
restoration and make any necessary
adjustments.

2. Patient Education: each the patient to avoid

hard, sticky, or abrasive foods that could
damage the restoration. Emphasize the
importance of maintaining good oral hygiene.

3. Provisional Restoration Longevity: The

lifespan of the provisional restoration depends
on factors like the material used, patient
compliance, and oral hygiene practices.
 Managing and maintaining
provisional restorations:
Additional Tips
- Material Selection: Choose a provisional material that suits the
patient’s needs and the specific clinical situation.

- Temporary Cement: Ensure the temporary cement is used

correctly to prevent dislodgment.

- Patient Communication: Keep the patient informed about the

provisional restoration’s purpose, care instructions, and any
potential issues.

Effective management and maintenance of provisional restorations

are key to a successful final restoration. If you have specific
questions or need further details, feel free to ask!
Thank
You