中文摘要：

目的：研究成人Ⅱ类1分类高角患者拔牙矫治前后软组织侧貌变化情况。方法：选择20例垂直生长型安氏Ⅱ类1分类拔牙病例,矫治前后拍摄头颅侧位片,对12个测量指标进行测量,比较矫治前后软组织变化情况。结果：矫治后TUL-EP、TLL-EP、上下唇位置等减小,而鼻唇角、Z角、颏唇沟倾角等增加,统计学分析结果具有显著差异。结论：成人骨性Ⅱ类高角拔牙病例治疗后侧貌能得到有效改善,随着前牙回收矢状位关系更协调,而垂直向位置关系并未发生明显变化。

英文摘要：

Objective：To evaluate the soft tissue change of skeletal Class Ⅱ malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment.Methods：20skeletal ClassⅡ high-angle malocclusion patients after tooth extraction orthodontic treatment were included in this study.The pre- and post-treatment cephalometric X-rays were made and 12 measurement items were measured.The change value of pre-and posttreatment were compared.Results：TUL-EP,TLL-EP,upper and lower lip position were reduced after treatment.Nasolabial angle,Z angle,mentolabial sulcus inclination angle were enlarged.Conclusion：Soft tissue profile was improved after four premolars extraction in skeletal classⅡhigh-angle malocclusion adult patients.The relationship of sagittal jaw became coordinated after the anterior tooth retraction and the vertical height showed no significant changes.The changes of soft tissue profile were moderately correlated with changes of anterior tooth retraction and the position of both lips.