6～12岁双生子女童头影测量中E平面的环境和遗传作用分析

Environmental and Genetic Effects on Ricketts Plane in Cephalograms of Female Twins from Six to Twelve Years Old

目的:探讨环境和遗传因素在混合牙列期对软组织E平面的影响,为确立牙齿的正确矫治计划提供理论依据。方法:测量6～12岁183对双生子女童的头颅侧位片,利用双生子法得出生长发育过程中环境和遗传因素对颅面软组织侧貌产生的影响。结果:检测到上唇突点E5、上口点E6、下唇突点E8受环境因素影响(P﹤0.05),鼻小柱点E2受遗传因素控制(P﹤0.05)。结论:上下唇部可以检测出受环境因素影响,而鼻小柱点主要受遗传因素控制。

Objective：To study the relative effects of environment and genes on the soft tissue ricketts plane during the mixed dentitions.Methods：The sample used in this study consisted of lateral cephalograms of one hunded and eighty-three female twins.The environmental and genetic effects were analyzed on soft tissue profile by twin methods.Results：The influence of environmental factors was detected by measurement items of upper labrale（E5）,stomion superius（E6）,and lower labrale（E8）（P﹤0.05）.However,the influence of genetic factors was detected by measurement items of columella（E2）（P﹤0.05）.Conclusion：The upper and lower lips could be detected by environmental factors,but the columellar mainly be controlled by the genetic factors.