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Antiplaque and Antigingivitis Agents MCQs With Answers

Antiplaque and Antigingivitis Agents MCQs

1. The biofilm that accumulates on teeth contains which percentage of bacteria?
a. 70%.
b. 78%.
c. 85%.
d. 90%.

2. The time that an agent remains in contact with oral surfaces is called
a. absorption.
b. metabolism.
c. distribution.
d. substantivity.

3. Which is NOT an indication for the use of chlorhexidine mouth rinse?
a. Treatment of denture stomatitis.
b. Use as a gingivitis prophylactic.
c. Postsurgical rinse to promote healing.
d. Adjunct to periodontal maintenance.

4. Cetylpyridinium chloride belongs to what class of antimicrobial agents?
a. Quaternary ammonium compounds.
b. Nonionic bisphenols.
c. Phenolic compounds.
d. Bis-biguanides.

5. Which effect of triclosan was surprising upon discovery?
a. Low levels of toxicity.
b. Decreased plaque formation.
c. Reduction in calculus formation.
d. Reduction of gingival inflammation.

6. Which fluoride compound inhibits plaque, due to the positive ion?
a. Sodium fluoride.
b. Stannous fluoride.
c. Monofluorophosphate.
d. Acidulated phosphate fluoride (APF).

7. Which agent’s antiplaque action prevents the adherence of bacteria to tooth structure?
a. Phenol.
b. Carbamide peroxide.
c. Cetylpyridinium chloride.
d. Delmopinol hydrochloride.

8. Which local periodontal agent is approved by the FDA as a stand-alone product?
a. Arestin.
b. Actisite.
c. Atridox.
d. PerioChip.

9. Which type of organism is least likely to be involved in periodontal disease?
a. Anaerobes.
b. Spirochetes.
c. Gram-positive cocci.
d. Gram-negative rods.

10. Which is NOT a criterion set by the American Dental Association (ADA) Council on Scientific Affairs for testing antiplaque and antigingivitis agents?
a. Minimum of two independent trials.
b. Trial duration is 6 months minimum.
c. Agent must produce a 20% clinical significance.
d. Study populations should consist of exceptional consumers.

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