하악골 상행지의 수직 골절단술과 시상분할 골절단술을 이용한 하악골 전돌증의 외과적 치험례

Abstract

This is a case report of mandibular prognathism corrected by orthognathic surgery with pre-and post op. orthodontic treatment. The patient was 17years old with severe skeletal class Ⅲ malocclusion (<ANB, -6.5, Mx-Mn differential, 53mm) and mild mandibular asymmetry due to overdeveloped mandible. After the precise clinical, cephalometric and model analysis, the patient was treated with vertical ramus osteotomy on Rt. side, intraoral sagittal spilt ramus osteotomy on Lt. side and the treatment results analyzed radiographically and clinically. The results were as follows; The mandible was moved backward 8mm on Lt. side, 11mm on Rt. side at occlusal plane level and it was produced marked profile change. The preop. and postop. orthodontic treatment improved the esthetic and functional results of orthodontic surgery.