Dental Dental Pharmacology 2

Question 1

Which drug classification does nitrous oxide (N₂O) fall under in dentistry?

Accepted Answer

Anxiolytic/minimal sedation agent

Answer

Nitrous oxide combined with oxygen is classified as a minimal sedation/anxiolytic agent in dentistry that reduces anxiety and provides mild analgesia while maintaining consciousness.

Question 2

Amoxicillin is the antibiotic of choice for endocarditis prophylaxis before dental procedures. What is the standard adult prophylactic dose?

Accepted Answer

2 g 30–60 minutes before

Answer

The AHA/ADA recommend a single oral dose of amoxicillin 2 g administered 30–60 minutes before the dental procedure for infective endocarditis prophylaxis.

Question 3

Which topical anesthetic agent is commonly applied before intraoral injections to reduce needle insertion pain?

Accepted Answer

Benzocaine 20%

Answer

Benzocaine 20% gel or liquid is the most commonly used topical dental anesthetic applied to mucous membranes before injections to minimize discomfort.

Question 4

Fluoride varnish applied professionally to teeth helps prevent caries primarily through which mechanism?

Accepted Answer

Promoting remineralization and inhibiting demineralization of enamel

Answer

Fluoride varnish provides a high-concentration fluoride reservoir that is slowly released, promoting remineralization of early enamel lesions and inhibiting bacterial acid production.

Question 5

A patient taking warfarin (anticoagulant) requires a tooth extraction. What INR level is generally considered safe to proceed with routine dental extractions?

Accepted Answer

INR up to 3.5

Answer

Most dental literature supports proceeding with routine extractions when a patient's INR is ≤3.5, as local hemostatic measures are typically sufficient to control bleeding.

Dental Practice Test

Dental Practice Test

Dental Dental Pharmacology 2