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Oral Surgery · single question

Osteonecrosis of the jaw (MRONJ) most commonly occurs in which location?

  1. Posterior mandible
  2. Anterior mandible
  3. Maxillary tuberosity
  4. Palate
Show answer and explanation

Correct answer: A. Posterior mandible

  • A. Correct. MRONJ (Medication-Related Osteonecrosis of the Jaw) occurs most frequently in the posterior mandible, particularly in the mylohyoid ridge region and sites of prior extractions. The mandible is affected 2-3x more often than the maxilla.
  • B. Anterior mandible — possible but less common than posterior mandible.
  • C. The maxillary tuberosity is a much less common site for MRONJ.
  • D. Palatal MRONJ is rare.

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