拔牙矫治对 AngleⅡ1错牙合成年女性面部软组织正貌的影响

摘要

目的：探讨 AngleⅡ1错成年女性拔牙矫治后面部软组织正貌的改变。方法：采用直接活体测量法，测量51例成年女性 AngleⅡ1错患者矫治前后面部软组织正貌美学指标的改变，其中拔牙组30例，非拔牙对照组21例，并对矫治前后的变化量进行统计学分析。结果：拔牙组矫治后 N-Me、Sn-Me、Sn-UL、LL-Sm、Sto-M、Ch-Ch 增大（P ＜0．05），UL-LL 减小（P＜0．05），Zy-Zy、Go-Go 无明显变化（P ＞0．05）。非拔牙组矫治后各指标均无明显变化（P ＞0．05）。组间比较中 Sn-UL、LL-Sm、UL-LL 差异有统计学意义（P ＜0．01），其余各项无统计学意义（P ＞0．05）。结论：成年女性 AngleⅡ1错患者通过拔牙矫治，主要表现为口周软组织的变化，开唇露齿明显改善，上下唇形态更趋协调；对面高及面宽无明显影响。%Objective:To explore the changes of orthodontic therapy with tooth extraction on frontal view of facial soft tissue in adult females with Class Ⅱ division 1 malocclusion.Methods:Frontal view of facial soft tissue aesthetic charaeteristics of 30 with and 21 without tooth extraction adult females with Class Ⅱ division 1 malocclusion were measured with direct anthropometry before and after orthodontic treatment.Results:After the extraction treatment,the distance of N-Me,Sn-Me,Sn-UL,LL-Sm,Sto-Me,Ch-Ch in-creased(P <0.05),while UL-LL decreased(P <0.05).But Zy-Zy,Go-Go had no significant change(P >0.05).There was no sig-nificant change in each parameter in nonextraction group(P >0.05).Between the 2 groups Sn-UL,LL-Sm and UL-LL showed differ-ence(P <0.05),but other parameters showed no difference(P >0.05).Conclusion:Orthodontic treatment with tooth for the fe-males with Class Ⅱ division 1 malocclusion can improve the incompetent lips,and recover the coordination between the upper and lower lips.There is little change on facial height and width.