口内下颌升支矢状劈开截骨矫治偏颌畸形

Correction of Lateral Deviation of Mandible with the Intraoral Sagittal Split Ramus Osteotomy

目的 :探讨一种简便可行的治疗偏颌畸形的手术方法。方法 :选择下颌升支发育过长 ,上颌骨体及升支均发育过长、或者合并下颌前突的病人 36例 (将原有下颌升支矢状劈开截骨术之升支舌侧水平截骨线改成与牙合平面夹 30°～ 45°角的不同方向的斜行截骨线 )。劈开后旋转下颌骨达到左右对称。结果 :36例均为健侧正常 ,患侧发育过长或合并下颌前突的病例 ,施行双侧下颌升支矢状劈开截骨术 ,术后无并发症 ,X光片检查各项指标均在正常范围内 ,术后面形及颏的形态均令人满意。结论

Objective:To discuss a simple and available operative method to treat lateral deviation of mandible.Methods:36 cases were selected who suffered overlength of mandible ramus,both body and ramus of mandible and combined with protrusive mandible.The mandible was rotated to symmetric in both side after sagittal split ramus osteotomy.Results:36 cases of overlength ramus or combined with protrusive mandible who were normal in opposite side had received split ostcotomy bilatcral.There were no complication after operation and every data were in normal range after X-ray examinations.The appearance of facial and mandible shape were satisfied.Conclusion:The improved split ramus osteotomy could be an ideal method to treat lateral deviation of mandible comparatively.