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Anatomy & Histology · single question

Patient with swelling in the area of tooth #17 and pain after extraction. Which nerve is responsible?

  1. Inferior alveolar nerve
  2. Long buccal nerve
  3. Facial nerve
  4. PSA (posterior superior alveolar) nerve
Show answer and explanation

Correct answer: A. Inferior alveolar nerve

  • A. Correct. The inferior alveolar nerve innervates the mandibular molar region (including #17) and is most directly implicated in post-extraction pain/swelling there.
  • B. The long buccal nerve provides buccal soft tissue sensation in this region but is not the primary nerve associated with deeper post-extraction pain.
  • C. The facial nerve is primarily motor to facial muscles, not sensory to this region.
  • D. The PSA nerve innervates maxillary molars, not the mandibular #17 region.

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