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Dental Academy

PERIODONTAL INSTRUMENTATION (QUESTIONS)

1. Contraindications for root planing include c. Subgingival calculus
all EXCEPT: (Past Q) d. GCF
a. Gingival recession
b. Deficient or overhanging margins of Ans. is _________________________________
restorations
c. Erosion & abrasion 5. Objectives of polishing teeth include:
d. Root caries (Past Q)
a. Removal of tooth stains, biofilms and
Ans. is _________________________________ dental plaque
b. Production of smooth surface resistant to
2. The primary objective of scaling and root staining and accumulation of deposits
planing is to: (Past Q) c. Motivates patient to practice better home
a. Cause shrinkage of gingival tissue care as teeth feel cleaner
b. Remove all infected root caries and d. All the above
created glass like surface
c. Remove all cementum from root Ans. is _________________________________
d. Restore the gingival health
6. Primary aim of root planing is to remove:
Ans. is _________________________________ (Past Q)
a. Calculus
3. A patient notices hard black deposits a few b. Necrotic cementum
days after scaling. These might be due to: c. Junctional epithelium
(Past Q) d. Plaque
a. Shrinkage of gingiva
b. Patient is heavy smoker Ans. is _________________________________
c. Poor home care
d. New carious lesions are formed 7. What is an instrumentation zone in
periodontal therapy: (Past Q)
Ans. is _________________________________ a. The portion of tooth where calculus &/
necrotic cementum is found
4. Root planing helps to remove cementum b. Cementoenamel junction
that has been altered because of its contact c. Exposed denuded root surfaces
with: (Past Q) d. Supragingival portion
a. Endotoxins
b. Exotoxins Ans. is _________________________________
 12. The part of the instrument which should
8. Scaling and root planning is performed: remain parallel to the long axis of the tooth
(Past Q) (when possible) (Past Q)
a. As initial treatment a. Blade
b. Only after flap surgery b. Handle
c. Only in patients with gingival c. Working end
enlargement d. Shank
d. After preprocedural antibiotic
administration Ans. is _________________________________

Ans. is _________________________________ 13. A tight grasp of explorer instrument by the

operator will: (Past Q)
9. Term “Curettage” is derived from the a. Prevent tactile sensitivity of operator
word "curette" which stands for: (Past Q) b. Provide greater maneuverability of
a. To 'penetrate' instrument
b. To 'investigate' c. Prevent muscle fatigue of the fingers
c. To 'cleanse' d. Help to better assess the surface
d. To 'perforate' irregularity

Ans. is _________________________________ Ans. is _________________________________

HAND INSTRUMENTS 14. The offset angle of Gracey curette between

10. Which instrument forms a two point the blade and shank is found to be:
(Past Q)
contact with the tooth: (Past Q)
a. 50°
a. Hoe
b. 60°
b. Curette
c. 70°
c. Sickle
d. 90°
d. Chisel

Ans. is _________________________________
Ans. is _________________________________

15. Gracey curettes are area specific

11. During activation of a hand scaling
instruments. This is because they: (Past Q)
instrument, the facial surface of the blade
a. Are used in the specific areas of the
should form an angle of ________ with the
world
tooth surface: (Past Q)
b. Adapt to specific areas of the tooth or
a. > 0 but <30
root
b. > 45 but < 90
c. Have more than one angle in every
c. > 60 but < 90
cutting edge
d. > 90 but < 150
d. Are used for root planning and polishing
Ans. is _________________________________
Ans. is _________________________________
16. Identification feature of Gracey curette is: b. Hu-friedy Mini 5 curette
(Past Q) c. Hu-friedy After 5 curette
a. Double curved blade d. Gracey curette
b. Blade at 70° angle in the shank
c. Cutting edge on both sides of blade Ans. is _________________________________
d. Blade at 30 degrees to the shank
I. A,B,C 21. For ideal tooth - blade working angle in a
II. A,B,C,D Gracey curette, the blade is angled from
III. A,B only lower shank at: (Past Q)
IV. B,C ONLY a. 10 - 20 degree
b. 60 - 70 degree
Ans. is _________________________________ c. 30-40 degree
d. 80 - 90 degree
17. Characteristic feature of Gracey curettes
is: (Past Q) Ans. is _________________________________
a. Used for specific area of mouth/ surface
of the tooth 22. Which instrument possesses highest
b. Have double cutting edge stability during scaling and root planning:
c. Can be used anywhere in oral cavity (Past Q)
d. Both A & B a. Curettes
b. Chisel
Ans. is _________________________________ c. Hoe scaler
d. Sickle scaler
18. Gracey curette No. 11/12 is used in:(Past Q)
a. Anterior teeth Ans. is _________________________________
b. Posterior teeth mesial surface
c. Posterior teeth distal surface 23. Cross section of sickle scaler is:(Past Q)
d. Posterior teeth facial and lingual surfaces a. Round
b. Triangular
Ans. is _________________________________ c. Elliptical
d. Square
19. Final Evaluation of the root surface for
smoothness after root planning is done Ans. is _________________________________
with the help of: (Past Q)
a. Ultrasonic tip 24. Which of the following instrument is used
b. CPITN probe with a 'Push' motion: (Past Q)
c. Explorer a. Hoe
d. Curettes b. Curette
c. Chisel
Ans. is _________________________________ d. Scaler

20. Instrument used to curette furcation area Ans. is _________________________________

is: (Past Q)
a. Naber's probe
25. Instrument best suited for root planning
is: (Past Q) 30. Which instrument is used for removal of
a. Chisel broken instrument tips from the
b. File periodontal pocket: (Past Q)
c. Curette a. Schwartz periotrievers
d. Scaler b. Barnhart instrument
c. EVA system
Ans. is _________________________________ d. Waterpik

26. Probing depth of a pocket is assessed by: Ans. is _________________________________

(Past Q)
a. Williams probe 31. Primary use of Orbans and Kirkland
b. Nabers probe knives is: (Past Q)
c. DNA probe a. Pocket Curettage
d. Peizoelectric scaler b. Scaling and Root planning
c. Vestibular incisions
Ans. is _________________________________ d. Gingivectomy

27. Probe used for measurement of furcation Ans. is _________________________________

is: (Past Q)
a. UNC-15 probe 32. First instrument to be used on the facial &
b. Naber's probe lingual surfaces of gingiva during
c. Florida probe gingivectomy is: (Past Q)
d. CPITN probe a. Orban's knife
b. Kirkland's knife
Ans. is _________________________________ c. Merrifield knife
d. BP blade No. 12 blade
28. What is the diameter of the tip of a
periodontal probe: (Past Q) Ans. is _________________________________
a. 1..25 mm
b. 0.5 mm SHARPENING OF INSTRUMENTS
c. 0.7 mm
33. An internal angle of ______ must be
d. 1.1 mm
preserved between the face & lateral
surface while sharpening curettes and
Ans. is _________________________________
sickles: (Past Q)
a. 100-140
29. Disadvantage of Florida probe system is:
b. 70-80
(Past Q)
c. 60-75
a. probing force is Inconsistent
d. 80-95
b. Does not measure extent of plaque
c. Non reproducibility in readings
Ans. is _________________________________
d. Lack of tactile sensitivity

Ans. is _________________________________
34. Ideal angle that should be formed between 38. Not an acceptable way to determine
the sharpening stone & the face of the instrument sharpness: (Past Q)
blade is: (Past Q) a. Evaluation of cutting efficiency during
a. 70 - 80 degrees scaling
b. 100 - 110 degrees b. Observation of light reflection from the
c. 90-100 degrees cutting edge under magnification
d. 120 - 130 degrees c. Evaluation of the cutting edge against
plastic testing stick
Ans. is _________________________________ d. Evaluation of cutting edge against the
operator’s nail
35. Hand sharpening of instruments with
unmounted stones is usually more Ans. is _________________________________
preferable to motor driven sharpening
because: (Past Q) SONIC AND ULTRASONIC
a. Unmouted stones have a finer grain INSTRUMENTS
b. Unmouted stones are less likely to alter
39. Ultrasonic scaler dislodges what kind of
the bevel
calculus: (Past Q)
c. Unmouted stones are easier to carry
a. Calculus that has formed recently
d. Unmouted stones wear away less of the
b. Calculus that is already loose
instrument surface
c. Calculus that is in direct contact with the
ultrasonic tip
Ans. is _________________________________
d. Calculus located on the interproximal
surfaces
36. Sharpening of dental instruments
increases efficiency because: (Past Q)
Ans. is _________________________________
I. Reduces slippage and less tissue damage
II. Increases tactile sensation
40. Not true about ultra sonic scalers: (Past Q)
III. Decreases muscle fatigue
a. Oscillation frequency is between 1500 to
IV. Improves cutting efficiency
3000 Hz
a. I,II,III,IV
b. Releases energy known as cavitation
b. I,II,III
c. Shows Acoustic streaming
c. I,II
d. Microbubble Implosion occurs
d. I only
Ans. is _________________________________
Ans. is _________________________________
41. Which of the following creates aerosols
37. Lubrication of Arkansas stone is done with
containing large number of
light mineral oil to: (Past Q)
microorganisms: (Past Q)
a. Prevent heat build up
a. Micromotor
b. Remove metal particles
b. Ultrasonic scaler
c. To maintain the correct angle of the
c. WaterPik
instrument
d. Endodontic reamer
d. Both a & b
Ans. is _________________________________
Ans. is _________________________________
42. Pattern of vibration of magnetostrictive 47. Electro-surgery uses controlled high
type of ultrasonic scaler is: (Past Q) frequency electrical current in the range
a. Elliptical of:
b. Linear a. 1.5-7.5 million cycles / second
c. Square b. 2.5-10 million cycles / second
d. Circular c. 15-22 million cycles / second
d. 25-31 million cycles / second
Ans. is _________________________________
Ans. is _________________________________
43. Pattern of vibration of Piezoelectric
ultrasonic unit is: 48. What is the optimal flow rate of coolant for
a. Oscillating in a line back & forth subgingival sonic and ultrasonic scaling:
(Past Q)
b. Orbital
c. Elliptical a. 1-10 ml/min
d. Figure of 8 b. 24-35 ml/min
c. 14-23 ml/min
Ans. is _________________________________ d. 35-44 ml/min

44. Functioning of cardiac pace maker can be Ans. is _________________________________

affected by: (Past Q)
a. Piezoelectric ultrasonic scaler 49. Wavelength used in Piezoelectric scaler is:
(Past Q)
b. Magnetostrictive ultrasonic scaler
a. 6000-8000 Hz
c. Sonic scalers
b. 2000-3000 Hz
d. WaerPik
c. 9000-11000 Hz
d. 20000-45000 Hz
Ans. is _________________________________

Ans. is _________________________________
45. Electronic devices are usually
contraindicated in: (Past Q)
50. Ultrasonic scalers vibrate at
a. Patients with pacemakers
approximately: (Past Q)
b. Patients with Tuberculosis
a. 25000 cycles per second
c. Cancer patients
b. 1500 cycles per second
d. Asthmatics
c. 10000 cycles per second
d. 5000 cycles per second
Ans. is _________________________________

Ans. is _________________________________
46. Ultrasonic scaler can be safely used in:
(Past Q)
a. AIDS patients 51. Wavelength of diode laser used in
b. Patients with pacemaker Periodontics is: (Past Q)

c. Asthamatic patients a. 450 – 950nm

d. Heavy calculus b. 450 – 650nm
c. 10600 – 20500nm
Ans. is _________________________________ d. 8000-10600nm
Ans. is _________________________________
 INSTRUMENT GRASP 56. All of the following are examples of
instrument grasp during scaling
52. Finger rest which is established on tooth
EXCEPT: (Past Q)
surfaces on the teeth of opposite side of the
a. Pen grasp
same arch is known as: (Past Q)
b. Thumb grasp
a. Conventional finger rest
c. Modified pen grasp
b. Opposite arch finger rest
d. Palm and thumb grasp
c. Finger - on - finger rest
d. Cross - arch finger rest
Ans. is _________________________________
Ans. is _________________________________
57. What is the relationship between the
working edge of instrument and tooth
53. Which of the following is an example of
surface called: (Past Q)
extraoral fulcrum:
a. Angulation
a. Cross arch
b. Adaptation
b. Opposite arch
c. Access
c. Palm down
d. Activation
d. Finger on finger

Ans. is _________________________________
Ans. is _________________________________

58. The angulation of a periodontal

54. In conventional finger rest method, finger
instrument refers to: (Past Q)
rest is established on: (Past Q)
a. Angle between the shank and the face of
a. Tooth immediately adjacent to the
blade
working area
b. Angle between the shank and the shaft of
b. Tooth on the opposite arch
the instrument
c. Tooth on the other side of the same arch
c. Angle between the face of instrument
d. Index finger or thumb of the non
blade and the tooth surface
operating hand
d. Angle between the shank and the tooth
surface
Ans. is _________________________________

Ans. is _________________________________
55. Extra oral palm up fulcrum is used to
instrument:
59. Scaling stroke is: (Past Q)
a. Maxillary left posterior teeth
a. Short & powerful pull stroke
b. Maxillary right posterior teeth
b. Short & powerful push stroke
c. Maxillary anteriors
c. Light to Moderate push stroke
d. Mandibular right posterior teeth
d. Light to Moderate pull stroke
Ans. is _________________________________
Ans. is ________________________________