拔牙矫治对面部侧貌影响的软组织头影测量研究

目的：探讨拔牙矫治对面部侧貌软组织平衡的影响。方法：选择15例以直丝弓矫治的拔牙矫治病例，对矫治前后患者的软组织侧貌的X线头颅侧位定位片进行测量分析。结果：①拔牙矫治后，面角，鼻唇角，Z角增大；②上唇长度，上唇厚度，下唇厚度增加，上唇突度减小，统计结果均有显著性差异；③正畸治疗后，软组织侧面突度通过拔牙矫治变小，面型由突面型成为较平直的面型；④患者面部侧貌治疗后软组织头影测量指标均值均在正常范围内。结论：拔牙矫治可改善面部的软组织平衡。

The Study on the Change of Facial Profiles in Extraction Treatment

Objective:To evaluate the changes of facial profiles after extraction treatment.Methods:Fifteen patients were treated with four premolars extraction.Every patient took pretreatment and postreatment cephalographs and tracings.The soft tissue profile were evaluated.Results:There was a significant increased in facial angle?nasolabial angle?Z angle?upper lip length?upper lip thickness and lower lip thickness.The upper lip protrusion was significant decreased.Conclusions:After extraction treatment the protrusion of soft profile was decreased.The patients with extract treatment had the facial esthelics and facial balance.