Chapter 8 Review Questions

Question 1

Whitening of teeth
A. Can cause them to become soft
B. Affects only extrinsic stains
C. Is very predictable
D. Can cause sensitivity of the teeth

Answer 1

D.

Question 2

Whitening of teeth works
A. By removing surface stains
B. By penetrating both enamel and dentin and oxidizing the stain
C. By sealing surface porosities so that stain cannot enter the tooth surface
D. By creating a white coating on the surface of the enamel

Answer 2

B.

Question 3

In-office whitening
A. Is superior in results to home whitening
B. Produces equivalent results to home whitening but is faster
C. Does not cause tooth sensitivity
D. Has no effect if the whitening agents contacts the gingiva

Answer 3

B.

Question 4

The active ingredient in most in-office and OTC whitening products is
A. Sodium bicarbonate
B. Ammonia
C. Phosphoric acid
D. Peroxide

Answer 4

D.

Question 5

Which one of the following can remove intrinsic stains?
A. Prophy cup with polishing paste
B. Hydrogen peroxide
C. Air polishing with sodium bicarbonate powder
D. Ultrasonic scaling

Answer 5

B.

Question 6

Whitening procedures should be avoided if the patient has any of the following except one. Which one is the exception?
A. Open carious lesions
B. Gingivitis
C. Hypersensitive teeth
D. Inability to give informed concent

Answer 6

B.

Question 7

Undesirable outcomes from home tray whitening include all of the following except one. Which one is the exception?
A. Soft tissue irritation
B. Root abrasion
C. Red wine stain
D. Temperature sensitivity

Answer 7

B.

Question 8

The most difficult stains to remove are?
A. Coffee stains
B. Chlorhexidine stains
C. Red wine stains
D. Tetracycline stains

Answer 8

D.

Question 9

Which one of the following statements about microabrasion is true?
A. It uses 35% phosphoric acid
B. It removes only the discoloration
C. It removes the discoloration and some enamel as well

Answer 9

C.

Question 10

Which one of the following statements about whitening strips is true?
A. Strips are less effective than paint-on whitening products
B. Strips are typically worn from 4 to 6 hours at a time
C. Strips interfere with speech
D. Strips are just as effective as home tray whitening with 10 to 15% carbamide peroxide

Answer 10

D.