90年代北京成人正常X线头影测量正常值研究

CEPHALOMETRIC NORMS OF NORMAL OCCLUSION FOR BEIJING ADULTS IN 1990S

目的：得到北京地区９０年代成人正常Ｘ线头影测量的正常值，并与８０年代美国白人资料和９０年代日本人资料比较，探讨现今不同种族间颅面结构的差异。方法：对７０名正常北京成人进行了计算机辅助的Ｘ线头影测量研究，用ＳＰＳＳ统计软件进行不同资料间的分析比较。结果：北京成人较美国白人颏点后缩，牙型前突；而和日本成人的骨面型、牙型均较一致。结论：现今颅面结构的种族差异不如前人的研究结果明显，更符合当代人审美观的Ｘ线头影测量参考值需进一步研究。

Objective:This study was to obtain the cephalometric norms of normal occlusion for Beijing adults in 1990s and to discuss the racial differences of cranifacial characteristics.Method:Seventy subjects were chosen in this study and were taken lateral cephalographs that were analyzed by computer aided system and statistical software of SPSS.Result:Beijing adults have more restrusive chins and more proclining anterior teeth compared with American Caucasian.While the hard tissue profile and denture pattern of our subjects were similar to Japanese adults.Conclusion:The difference of craniofacial structure between races is less distinguished than that in the earlier studies.More accurate cephalometric norms for orthodontic clinician should be further investigated.