新疆维汉青少年骨性Ⅱ类切牙唇倾度与牙槽骨结构的相关性

Correlation of alveolar bone structure and incisor labial inclination in adolescents with skeletal class Ⅱ malocclusion of Uygur and Han populations in Xinjiang,China

背景:研究指出上颌前牙唇倾度与前牙区唇腭侧牙槽骨厚度的空间位置关系,X射线头影测量存在种族和地域的差异。目的:对新疆维吾尔族及汉族青少年骨性Ⅱ类错不同垂直骨面型患者切牙区牙槽骨形态结构与切牙唇倾度进行相关性分析。方法:选取维吾尔族及汉族年龄在11-16岁骨性Ⅱ类错患者各60例,平均年龄13.8岁,拍摄头颅定位侧位片并测量上下前牙区牙槽骨厚度和前牙唇倾度,利用SPSS 17.0统计软件对测量结果进行比较分析。结果与结论:(1)汉族:上颌切牙根尖腭侧牙槽骨厚度(ULP)与上切牙唇倾度呈负相关(r=-0.715,P<0.05),下颌切牙根尖唇侧牙槽骨厚度(LBP)与下切牙唇倾度呈正相关(r=0.902,P<0.05);(2)维吾尔族:上颌切牙根尖腭侧牙槽骨厚度(ULP)与上切牙唇倾度呈负相关(r=-0.651,P<0.05),下颌切牙根尖唇侧牙槽骨厚度(LBP)与下切牙唇倾度呈正相关(r=0.745,P<0.05);(3)结果说明,维吾尔族及汉族上颌切牙根尖腭侧牙槽骨厚度随着上颌切牙唇倾度增大而减小,下颌切牙根尖唇侧牙槽骨厚度随下切牙唇倾度增大而增大。

BACKGROUND：Location relationship between maxillary incisor labial inclination and the thickness of anterior alveolar bone displays ethnic and regional differences.OBJECTIVE：To study the correlation of alveolar bone structure and incisor labial inclination in adolescents with skeletal class II malocclusion in Uygur and Han populations of Xinjiang,China.METHODS：Sixty Uygur and 60 Han patients at 11-16 years of age（average 13.8 years old）,32 males and 28 females,with skeletal class II malocclusion were included.The thickness of anterior alveolar bone and incisor labial inclination were measured on lateral cephalometric films,and the results were analyzed using SPSS 17.0 statistical software.RESULTS AND CONCLUSION：In Han and Uygur populations,palatal alveolar bone thickness in maxillary incisor region was significantly negatively correlated with the inclination of maxillary incisor（r=-0.715 for Han,r=-0.651 for Uygur,P〈0.05）,while labial alveolar bone thickness in mandibular incisor region was significantly positively correlated with the lower incisor inclination（r=0.902 for Han,r=0.745 for Uygur,P〈0.05）.These results indicate that the palatal alveolar bone thickness in maxillary incisor region decreases with the increase of the inclination of maxillary incisor;however,the labial alveolar bone thickness in mandibular incisor region increases with the increase of the lower incisor inclination.