NBDE Trivia 5

Question 1

Which drug interaction requires special consideration when prescribing metronidazole to a dental patient taking warfarin?

Accepted Answer

Metronidazole inhibits CYP2C9 and potentiates warfarin's anticoagulant effect

Answer

Metronidazole inhibits CYP2C9, slowing warfarin breakdown and raising INR, increasing bleeding risk.

Question 2

Which type of bone is found at the crest of the alveolar ridge, connecting the bundle bone of adjacent teeth?

Accepted Answer

Transseptal fiber bone

Answer

Transseptal fibers embedded in the crestal bone form a continuous ligamentous connection between teeth across the interdental septum.

Question 3

In caries risk assessment, which factor is considered the single strongest predictor of future caries activity?

Accepted Answer

Past caries experience

Answer

Past caries experience (DMFT/dmft history) is the best single predictor of future caries risk in both children and adults.

Question 4

Which landmark on the mandible serves as the attachment site for the medial pterygoid muscle?

Accepted Answer

Medial surface of ramus and angle

Answer

The medial pterygoid attaches to the medial surface of the mandibular ramus and angle, producing elevation and contralateral excursion.

Question 5

Which tooth surface is least susceptible to dental caries?

Accepted Answer

Smooth facial and lingual surfaces

Answer

Smooth facial and lingual surfaces are self-cleansing and benefit most from fluoride, making them the least caries-susceptible surfaces.

NBDE - National Board Dental Examination Practice Test