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Oral Surgery · single question

All of the following are TRUE about Le Fort I osteotomy EXCEPT:

  1. It allows three-dimensional repositioning of the maxilla
  2. It corrects maxillary deficiency (hypoplasia)
  3. It separates the maxilla from the pterygoid plates
  4. It can advance the mandible
Show answer and explanation

Correct answer: D. It can advance the mandible

  • A. Incorrect — this IS true. Le Fort I allows anterior-posterior, vertical, and transverse repositioning of the maxilla.
  • B. Incorrect — this IS true. Le Fort I advances a retruded maxilla or impacts a vertically excessive maxilla.
  • C. Incorrect — this IS true. Le Fort I cuts through the maxilla, separating it from the pterygoid plates and nasal floor.
  • D. Correct — NOT true. Le Fort I repositions the MAXILLA — it does NOT advance the mandible. Mandibular advancement is done with BSSO (bilateral sagittal split osteotomy). Le Fort I only moves the maxilla.

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