西安青年正常三维颅颌面硬组织形态分析

3D morphology analysis of craniofacial hard tissues of the youths with normal occlusion in Xi'an

目的:建立西安地区青年正常三维颅颌面硬组织测量标准值。方法:选取符合个别正常标准的18岁以上西安籍青年人100名(男女各50人)拍摄CBCT及头颅侧位片。选取31个标志点及31个测量项目,分别用Invivo Dental 5.2软件和Winceph 8.0软件定点测量,测量结果由SPSS19.0统计软件处理,进行性别间以及三维和二维数据比较。结果:女性下颌垂直向发育更明显,而男性下切牙唇倾度、颅底长度、下颌支高度、下颌体长度及面宽度均明显大于女性;同二维测量值相比,除U1-NA(mm)外,其余测量值差异均有统计学意义。结论:CBCT三维测量定点及测量可提供比二维测量更精确形态数据。

Objective： To study the morphologic standard values of craniofacial hard-tissue of the youths in Xi＇an. Methods： CBCT scanned cephalometric data of 100 selected volunteers（ 50 males and 50 females） with individual normal occlusion were collected. 31 landmarks and 31 measurements were compared between sexes and between 3D and 2D data with software Invivo Dental 5. 2,Win Ceph8. 0. and SPSS 19. 0. Results： 1. In the 3D measurements,vertical growth of mandible in the females was more than that in the males.The values of torque of lower incisor,basis length,height of rumi mandibulae and length of corpora mandibulae in the males were bigger than those in the females. 2. Compared with 2D measurements,there existed statistically significant differences in most parameters except U1-NA（ mm）. Conclusion： 3D analysis with CBCT may provide more accurite morphologic data for craniofacial hard tissues.