Anatomy & Histology · single question
When anesthetizing the inferior alveolar nerve (IAN), which anatomical landmark guides needle placement?
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Correct answer: B. Coronoid notch and pterygomandibular raphe
The IAN block is guided by the coronoid notch and pterygomandibular raphe — the injection is lateral to the raphe at the height of the coronoid notch, targeting the mandibular foramen.
- A. ❌ Incisive foramen is the landmark for the nasopalatine nerve block.
- B. ✅ CORRECT – Pterygomandibular raphe and coronoid notch are the key intraoral landmarks for IAN block.
- C. ❌ Hamular notch is used for posterior palatal seal in denture construction.
- D. ❌ Mental foramen is for mental/incisive nerve blocks, not IAN block.
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