[摘要]目的：探究骨性Ⅱ类错牙合畸形成人患者拔牙矫治后软硬组织的变化。方法：将符合纳入标准的38例骨性Ⅱ类错牙合患者治疗前与治疗后头颅侧位片进行测量分析，比较其相关测量指标的变化。结果：矫治后颌骨测量指标SNA、SNB、ANB、NP-FH、NA-PA差异均无统计学意义；牙齿测量指标U1-SN、U1-NA、U1-NA(mm)均明显减小，有显著的统计学差异，L1-MP、L1-NB、L1-NB(mm)有减小趋势，但差异无统计学意义。软组织测量指标Cm-Sn-UL角、U1-Ls(mm)明显增大，UL-SL(mm)、LL-SL(mm)、Si-SL(mm)、Pog'-SL(mm)均减小，差异有统计学意义，G-Sn-Pog'有减小趋势，但差异无统计学意义。结论：骨性Ⅱ类错牙合畸形成人患者拔牙矫治后切牙代偿回收较明显，矫治后软组织侧貌得到良好改善。

    [关键词]骨性Ⅱ类；拔牙矫治；软组织侧貌；X线头影测量；成人

    [中图分类号]R783.5 [文献标志码]A [文章编号]1008-6455(2015)23-0058-03

    Abstract： Objective To investigate soft and hard tissue changes in patients with skeletal class Ⅱ malocclusion after premolar extraction treatment. Methods 38 patients were taken standardized lateral cephalograms before and after the treatment.Some measurements were analyzed to compare the difference before and after treatment. Results There was no significant difference with measurements of the angle of SNA ......