Radiology · single question
A CBCT scan of a missing mandibular second premolar area shows a nerve. Which nerve is seen here?
Show answer and explanation
Correct answer: A. Mental nerve
- A. Correct. The MENTAL NERVE is the terminal branch of the inferior alveolar nerve that exits through the MENTAL FORAMEN, typically located near the mandibular first/second premolar (#20–#21). Identification of the mental foramen is critical for implant planning in this area.
- B. Incorrect. The IAN runs within the mandibular canal. The specific nerve EMERGING (exiting) in the premolar region is the mental nerve — the terminal branch of the IAN.
- C. Incorrect. The buccal nerve innervates the buccal mucosa and gingiva — it does not run in the mandibular canal.
- D. Incorrect. The lingual nerve runs along the lingual surface of the mandible and is not visible in the mandibular canal on CBCT.