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目的利用Delaire整体平衡分析法研究重庆地区汉族及土家族正常青年颅颌骨形态结构,并进行分析比较。方法选取符合正常标准的18～26岁青年男性和女性153例(汉族:男性37例,女性41例;土家族:男性36例,女性39例),分别摄头颅侧位X线片,对其进行头影测量分析,计算2组的结构特征值并将其进行比较。结果重庆地区汉族和土家族青年人群正常中男性均较女性颏部后缩,男性下颌角及下颌平面相对女性顺时针旋转。余重庆地区汉族和土家族青年人群正常中男性与女性颅骨结构特征数据无显著差异(P>0.05)。汉族青年人与土家族人颅颌骨形态值有显著差异(P<0.05),汉族青年人的关节窝相对于土家族人来说,在矢状位要后移一些,更靠近颅底。土家族人颅底矢状向长度相对大些。结论重庆地区汉族青年男女之间和土家族青年男女之间颅颌面特征基本相似。土家族青年人群面型相对直立。
OBJECTIVE: To study the morphology of cranial and mandible of Han nationality and Tujia normal group of young people in Chongqing with Delaire global equilibrium analysis. Methods A total of 153 males and females aged 18-26 years (n = 37 in Han nationality, 41 in females, 36 in males and 39 in females) were enrolled in this study. The cephalometric analysis of the two groups of structural eigenvalues were calculated and compared. Results In Han nationality and Tujia nationality young people in Chongqing area, the males were chin constricted more than the female chin constricted normally. The male mandibular angle and mandibular plane were rotated clockwise. There were no significant differences in the structural characteristics of the skull between male and female in Han and Tujia nationalities in Chongqing during the past 30 years (P> 0.05). There was a significant difference in cranial shape between Han and Tujia nationalities (P <0.05). Compared with Tujia people, the kennel position of young Han people was slightly shifted in the sagittal position and closer to the skull base. Tujia skull base sagittal length is relatively large. Conclusion The cranio-maxillofacial characteristics of young Han men and women and young men and women in Chongqing are similar. Tujia young people face relatively upright.