Applied Anatomic Findings for Mandibular Osteoto my in Cosmetic Surgery

Objective:To explore the tissue structure of mandible angle region for intra-oral arc osteotomy and to provide anatomic information to avoid damaging the important structures during operation. Methods: Twenty cadaveric specimens of normal adult head and neck and 20 dry mandibles were used to observe the position of important structures and their relations with mandible angle. And the distance from mandibular canal to inferior edge of mandible was measured. Results: The important and adjacent structures were clearly understood, and the distance was 21.8±3.6 mm from mandibular canal to inferior edge of mandible. Conclusion: The key factors, which should be considered in the operation, were the length of incision and distance between mandible angle and transverse structures in the superficial layer.