呼和浩特市高校正常牙合人群牙冠凸距的测量研究

Preliminary research on the measurement of the crown facial prominences among college students in Hohhot by spiral CT

目的测量分析呼和浩特地区汉族及蒙古族正常冠凸距数据,对比研究牙冠凸距值蒙汉族人群及性别的差异性。方法对呼和浩特市5所高校普查筛选,选出80名正常志愿者,其中蒙汉族学生各40名,男女各一半,用GE64排螺旋CT机进行上下颌骨的扫描,对扫描图像进行测量,并配对t检验比较左右侧、民族间、性别间的差异。结果 1建立本地区蒙古族、汉族男性与女性的冠凸距的均数与标准差。2男性间比较蒙、汉族在U1、U4、U6、L4、L5的冠凸距测量值具有显著差异,女性间比较蒙、汉族在U2、U6、L1、L7的冠凸距测量值具有统计学差异。结论正畸治疗中,应根据蒙、汉族患者间的差异适当调整矫治量,不可一概而论。

Objective To measure and analyze the normal crown facial prominences among people of Han and Mongolian nationality in Hobbot,and to compare the differences of the crown facial prominences between Mongolians and Hans as well as the difference between genders. Methods 80 volunteers with normal occlusion were selected from five universities in Hohhot, among whom 40 were Hans and 40 were Mongolians with both sexes equally represented. The upper and lower jaws of the selected samples were scanned by the GE64- slice spiral CT machine,and the scan images were measured. Then the differences between right and left sides, genders and ethnicities were observed and compared with paired-t test. Results ①The mean and standard deviation of crown facial prominence among men and women in Han and Mongolian nationality were established. ②The differences in U1 ,U4,U6,L4 and L5 among males between Mon- golian and Han nationality were of statistical significance; the differences in U2,U6,L1 and L7 among females between Mongolian and Han nationality were statistically meaningful. Conclusions During orthodontic treatment,correctional quantity should be adjusted ac- cording to the differences in the Mongolians and the Hans and can＇t be treated as the same.