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目的：探讨安氏Ⅱ类１分类成年与青少年拔牙治疗后其软组织改变的差异。方法：选择经拔除４个第一前磨牙进行正畸治疗结束的安氏Ⅱ类１分类错牙合患者３２例（其中成人与青少年各１６例），应用Ｘ线头影测量技术对其治疗前后软组织发生的变化进行测量研究，并对两年龄组的测量结果加以分析比较。结果：（１）经拔牙治疗青少年患者侧面凸度明显变小，而成年人没有明显改变。（２）青少年患者治疗后由于上唇突软组织增厚，软组织颏前点前移，使正畸治疗后的侧貌轮廓较成人更为满意，而成人由于正畸治疗其上唇及下颌顺时针旋转的改变易致“正畸面容”。结论：临床上预测拔牙治疗后上唇位置，不但要考虑上唇与上切牙后退比例，还应结合上唇软组织厚度的生长发育改变的结果，两组间存在实质性差异
OBJECTIVE: To investigate the difference of soft tissue changes after the tooth extraction in Angle Class Ⅱ Division 1 adults and adolescents. Methods: 32 patients (including 16 adults and adolescents) with Class Ⅱ division 1 malocclusion who had completed the orthodontic treatment after removal of the four first premolar teeth were enrolled in this study. X-ray cephalometry The changes were measured and analyzed, and the results of the two age groups were analyzed and compared. Results: (1) The degree of lateral convexity of the adolescents treated by tooth extraction was significantly smaller than that of the adults, while the adults did not change significantly. (2) young patients after treatment due to thickening of upper lip soft tissue, soft tissue anterior pronation point, so that profile after orthodontic treatment more satisfactory than adults, and adult due to orthodontic treatment of its upper lip and mandrel clockwise rotation Change prone to “orthodontic face.” Conclusion: Predicting the position of the upper lip after tooth extraction is not only to consider the ratio of the upper lip and the incisor retraction, but also to the result of the change of the growth and development of upper lip and soft tissue thickness. There is a significant difference between the two groups