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目的 探讨骨性Ⅲ类患者面部不对称程度分别与下颌骨形态学代偿以及ANB角的相关性.方法 按照纳入标准选取28名2015-2016年度于北京大学口腔医院就诊并拍摄大视野CBCT的骨性Ⅲ类面部不对称患者,使用Dolphin3D软件进行面部不对称程度及下颌骨形态学代偿的相关测量,应用Pearson相关性分析评价面部不对称程度分别与下颌骨形态学代偿以及ANB角的相关性.结果 升支长度差与升支冠状角之差及髁突水平角之差均呈负相关.矢状角之差与颏部偏斜距离正相关.面部不对称程度与ANB角未发现相关关系.结论 随着升支长度差增加,升支冠状角之差代偿程度减弱,髁突水平角之差代偿程度增强.升支矢状角之差可以作为评价面部不对称程度的指标.根据本研究的初步结果表明Ⅲ类畸形严重程度与面部不对称程度无相关性.“,”Objective To investigate the correlation between facial asymmetry and the compensation of mandibular morphology as well as ANB angle respectively in skeletal Class Ⅲ patients.Methods 28 patients with Class Ⅲ malocclusion and facial asymmetry were collected.Pretreatment cone-beam computed tomography images of all patients were imported to Dolphin3D software to determine the degree of facial asymmetry and mandibular morphologic adaption.The Pearson correlation analysis was used to evaluate the correlation between facial asymmetry and compensation of mandibular morphology as well as ANB angle respectively.Results Difference in ramus length was negatively related with difference in frontal ramus inclination and difference in axial condylar inclination.Difference in lateral ramus inclination was positively related with menton deviation distance.The degree of facial asymmetry had no correlation with ANB angle.Conclusions When the difference in ramus length increased,the degree of compensation of difference in frontal ramus inclination decreased while that of the axial condylar inclination increased.The difference in lateral ramus inclination could be an index to evaluate degree of facial asymmetry.The degree of facial asymmetry had no correlation with ANB angle in skeletal Class Ⅲ patients.