口周肌压力与牙颌形态的相关性一直是正畸医师所关注的一个焦点。本研究以成人骨性安格尔Ⅲ类错患者为研究对象，并与正常组比较分析，以分析骨性Ⅲ类患者的口周肌压力特征，了解口周肌压力与牙颌形态的相关性。 The correlation between perioral muscle pressure and dento-mandibular morphology has been the focus of orthodontists. In this study, patients with adult skeletal Class Ⅱ malocclusion were studied and compared with those in normal control group to analyze the characteristics of osseous muscle pressure in patients with skeletal Class Ⅲ, and to understand the relationship between perioperatorial pressure and dento-mandibular morphology Correlation.