山东籍汉族正常(牙合)少年儿童各骨龄面型模板的初步研究

目的 通过建立山东籍汉族正常(牙合)少年儿童的面型模板,为正畸临床、正颌外科和科研工作提供理论依据和评价标准.方法 按骨龄分组,将212例(男107例,女105例)8～16岁山东省正常(牙合)少年儿童的头影侧位定位片的轮廓图输入计算机,将14个标志点矢量化,使图形转化为线条图,利用Wincept7.0软件建立面型模板.结果 建立山东籍汉族正常(牙合)少年儿童不同性别及不同骨龄发育阶段的面型模板.结论 将男女相同骨龄组的模板以SN平面做基准平面进行重叠,可以看出男性的面部轮廓均大于同期女性,且男性的下颌平面角小于同期女性;将同性别各骨龄组间的模板进行重叠,可以看出少年儿童的面部有向前向下的发育趋势,下颌骨随骨龄增长呈现逆时针旋转,下颌平面角趋于缩小.

Differential templates in foundation of staging by skeletal age on juvenile and children with normal occlusion in Shandong

Objective To establish the differential templates of juvenile and children in Shandong with normal occlusion, according to the group of skeletal age. Methods 212 juvenile and children at the age of 8-16 years (107 males and 105 females) with normal occlusion in Shandong natives were took cephalomatric radiographs, and divided into different groups by cervical vertebrae skeletal age. Then these cephalomatric radiographs were scanned on the computer and 14 skeletal landmarks were vectorizated. An analytical method of Ricketts and McNamara with WinCept 7.0 was used to make statistics and variance analysis among gender and every group of cervical vertebrae skeletal age,and then established the templates. Results The juvenile and children in Shandong natives with normal occlusion had different templates. Conclusion By overlapping the same skeletal age of templates by SN plane, we can see that male face outline is greater than female and male mandibular plane angle is smaller than female. By overlapping the same gender of templates, there is a developmental trend of mandibular bone to be forward and downward, and to revolve anticlockwise with age.