skip to main content

Third Molar Extraction Nerve Injury — NDEB AFK MCQ

Instant feedback + full explanation. One question, done properly.

ModerateBiomedical SciencesThird Molar Extraction Nerve InjuryNDEB AFK

Which nerve is at greatest risk of injury during surgical removal of a deeply impacted mandibular third molar with roots in close proximity to the mandibular canal?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: D — Inferior alveolar nerve

When third molar roots are intimately associated with the mandibular canal (as confirmed by panoramic signs such as root darkening, canal narrowing, or deflection), the inferior alveolar nerve is at greatest risk of injury during extraction. The lingual nerve is also at risk from lingual flap retraction, but the direct proximity to the canal makes IAN injury most likely in the described scenario.

Reference: Hupp – Contemporary Oral and Maxillofacial Surgery, 7th ed., 2019