口内入路三点定位弧线截骨矫治下颌角肥大

Transoral Approach Three Point Localization Curve Shape osteotomy for the treatment of Mandibular Angle Hypertrophy

目的:介绍一种口内入路三点定位弧线形截骨矫治下颌角肥大的新方法。方法:68例下颌角肥大矫治术,均经口内入路。充分游离下颌角周围软组织。把下颌骨升支前缘向下的延长线与下颌骨下缘的交点设为A点;咬合平面的平行线与下颌骨升支后缘的交点设为B点;原下颌角设为C点;新的下颌角设为D点。在A、B的连线上设置一条垂线,经过C点。在垂线上距C点约1～2cm处,确定D点。用摆动锯在A、D、B三点之间弧线截骨。结果:68例术后,无面神经损伤、口唇麻木、骨折、不对称等。满意率约占97%。结论:三点定位弧线形截骨法与口内外入路其它去除下颌角的方法比较。优点多,安全性大,效果好。值得推广。

Objective To introduce a new approach for treatment of mandibular angle hypertrophy-transoral approach three point localization curve shape osteotomy. Methods 68 patients with mandibular angle hypertrophy were choosed to be operated by transoral approach. Tissues around mandibular angle was dissociated extensively. Set the intersection of mandibular angle ascending branch anterior border decurrent extension line and the inferior border of mandible as point A, the intersection of parallel lines of biteplane and the posteromarginal of mandibular angle ascending branch as point B, the original mandibular angle as point C, the new mandibular angle as point D, to set a perpendicular which goes through point C on the line AB, then to set point D on the perpendicular above point C about 1 or 2 cm, and finally to cut the bone following the curve which goes through point A,D,B, Results No complications such as injury of facial nerve, oral lips numbness, bone fracture and facial asymmetry, 97% of patients were satisfied, Conclusion To compare with other methods, the new method of the three point localization curve osteotomy has much more advantages, it＇s safer and more effective and it＇s worthy of widely spreading,