1957年 Obwegeser 等首先介绍口内切口作下颌骨升枝矢状切开术治疗下颌前突,后经其他学者的不断改进,近年来在临床上已成为一种流行的术式,我科自1981年以来用该法矫治下颌前突12例,取得了良好效果。资料及方法病例12例,男10例,女2例,年龄18至29岁,真性下颌前突7例,真性下颌前突伴上颌骨发育不良5例。单作升枝矢状劈开6例,矢 In 1957, Obwegeser et al first introduced the incision of the mouth for mandibular ligation sagittal sagittal for the treatment of mandibular prognathism, followed by other scholars continue to improve in recent years has become clinically a popular surgical procedure, our department since 1981 Since the method used to treat mandibular protrusion in 12 cases, and achieved good results. Materials and Methods 12 cases, 10 males and 2 females, aged 18 to 29 years, 7 cases of true mandibular prognathism, true mandibular prognathism with maxillary dysplasia in 5 cases. Single ascending branch sagittal split in 6 cases, vector