Chapter 37 Wilkins preclinic

1. The requirements for putting the instruments into action to accomplish a particular task are stabilization by means of a correct grasp and finger rest, and all of the following except one. Which one is the exception?

a) Adaptation

b) Angulation

c) Indirect vision

d) Lateral pressure

e) Stroke

C

2. Of the following, which would be considered an examination instrument?

a) Curet

b) Scaler

c) Hoe

d) Chisel

e) Explorer

E

3. Which of the following terms is used to describe the part of the instrument used to carry out the purpose and function of the instrument?

a) Shank

b) Handle

c) Shaft

d) Working end

e) Face

D

4. A) The more restricted the access, the more angulated a shank must be and the sharper the bends of the angles. B) Because the mesial surfaces of molars are much less accessible than the distal surfaces, the shank angles of the 13 and 14 are designed with deeper bends.

a) Statement A is true and statement B is false.

b) Statement A is false and statement B is true.

c) Both statements are true.

d) Both statements are false,

A

5. Which of the following instruments designs is least likely to provide good tactile sensitivity?

a) Moderately flexible shank

b) Rigid shank

c) Flexible shank

d) Elongated shank

e) Hollow metal handle

B

6. The inner surface of the blade of a scaler or curet is known as which of the following?

a) Lateral surface

b) Face

c) Back

d) Tip

e) Cutting edge

B

7. Which of the following instruments has one continuous cutting edge around the face because the two sides are united without interruption by the rounded toe? a) Curved scaler

b) Sickle scaler

c) Straight scaler

d) Universal curet

e) Area-specific curet

D

8. There are many variations in the design of area-specific curets. Which of the following objectives would be helpful in the design of area-specific curets?

a) To facilitate access to heavy şupragingival calculus

b) To conform to the curvatures of roots c) Increased length of the instrument handle

d) Shortened terminal shank for deeper pockets

e) V-shaped back to facilitate sharpening

B

9. When scaling with a curet, the ideal angulation formed between the instrument face and tooth surface should be:

a) 15 degrees.

b) 35 degrees.

c) 50 degrees.

d) 70 degrees.

e) 90 degrees.

D

10. Area-specific curets have many design features in common with universal curets. All of the following characteristics apply to both except one. Which one is the exception?

a) Rounded toe and back

b) Two cutting edges on each end

c) Paired, mirror-image working ends

d) Straight shank for anterior, complex for posterior

e) Available with a rigid or flexible shank

B

11. Which of the following instruments would be the best choice to remove heavy calculus from the proximal areas of the mandibular anterior teeth?

a) Universal curet

b) Area-specific curet

c) Sickle scaler

d) Hoe

e) Chisel

E

12. Which of the following instruments would you use on the lower anterior region with a push stroke?

a) Periodontal file

b) Chisel

c) Ное

d) Sickle

e) Curet

B

13. You have just completed scaling teeth 28 to 31 on Mr. Jones and have asked an instructor to give you a grade. Your hand and fingers are very sore. The instructor notices calculus on all of the interproximal areas and sees you shaking your wrist. She asks that you demonstrate your grasp and stroke in the area for her. What has most likely caused your soreness and lack of effectiveness in the area?

a) Patient compliance

b) Working too quickly

c) A rigid grasp

d) The instructor is wrong, you did fine.

e) Poor lighting

C

14. Mr. Jones is going to have a filling placed after you finish scaling. The dentist has asked that you put on the rubber dam for him. When you place the rubber dam on this patient, what type of an instrument grasp will you need to use with the rubber dam clamp holder?

a) Modified pen grasp

b) Pen grasp

c) Palm grasp

d) Neutral grasp

C

15. If you work with a bent wrist while scaling, what condition might you develop?

a) Carotid sinus reflex

b) Caseous abscess

c) Carpal tunnel syndrome

d) Thoracelgia

e) Osteoarthritis

C

16. Which type of finger rest allows the index finger of your nondominant hand to rest on the tooth adjacent to the one you are scaling, while your thumb is placed on the instrument shank for more lateral pressure?

a) Traditional fulcrum

b) Substitute fulcrum

c) Supplementary fulcrum

d) Reinforced fulcrum

e) Unacceptable fulcrum

D

17. A) When scaling, the instrument is adapted for maximum usefulness of the working end or 2 to 3 mm of the toe third of a curet on a "flat" surface. B) On a line angle or convex surface of a narrow root, less than 2 mm will be adaptable.

a) Statement A is true and statement B is false.

b) Statement A is false and statement B is true.

c) Both statements are true.

d) Both statements are false.

C

18. All of the following are objectives for using assessment strokes with curet except one. Which one is the exception? a) Determine the surface texture of the root.

b) Confirm the position of the curet at the base of the pocket.

c) Rehearse an intended movement prior to activation.

d) Remove fine calculus subgingivally.

e) Determine the completion of your scaling in the area.

D

19. Increased tactile sensitivity can result from all of the following, except:

a) using a thinner shank.

b) removing fine deposits of calculus.

c) doing maintenance of root debridement.

d) using the file.

D

20. A) The symptoms of carpal tunnel syndrome are caused by compression of the radial nerve. B) Repetitive movements during actual instrumentation can lead to carpal tunnel syndrome.

a) Statement A is true and statement B is false.

b) Statement A is false and statement B is true.

c) Both statements are true.

d) Both statements are false.

B

21. Inadequate lighting can result in:

a) more thorough instrumentation.

b) less time required for treatment.

c) increased patient cooperation.

d) increased trauma to oral tissues.

D

22. All of the following are problem areas when angulating, except:

a) the cervical area.

b) the raised ridge.

c) the convex area.

d) the proximal root surface.

B

23. A) Power-driven scaling devices convert electrical energy (ultrasonic) or air pressure (sonic) into high-frequency sound waves. B) Sound waves produce rapid mechanical vibrations in the specially designed scaling tips.

a) The first statement is true and the second statement is false.

b) The first statement is false and the second statement is true.

c) Both statements are true.

d) Both statements are false.

C

24. Sonic scalers are driven by:

a) mechanical energy.

b) compressed air.

c) electrical energy.

d) All of these are correct.

B