西安地区汉族恒牙初期正常腭部形态的三维测量研究

Three Dimensional Study on the Palatal Morphology of Xi'an Residents with Early Normal Permanent Occlusion

目的:对恒牙初期正常腭部形态进行三维方向上的研究,为探讨恒牙初期腭部的发育特点以及制定国人腭部形态的正常指标提供参考。方法:收集符合纳入标准的西安地区汉族恒牙初期正常上颌石膏模型,按照年龄以及性别进行分组,结合逆向工程方式采集数据并建立三维模型,利用Geomagic10.0软件从矢状向、水平向及冠状向对相关指标进行三维测量并进行统计分析。结果:腭宽度和腭高度存在性别差异,男性大于女性;男性腭高度有随年龄增加而增长的趋势直到17岁;无论男女,腭部都不是完全对称的,存在(2.14±1.74)°的不对称度。结论:恒牙初期腭部形态存在性别差异、增龄变化以及不对称性,其中男性腭部形态变化较大,以腭高度的增加为主;女性腭部形态则比较稳定,未观察到明显的生长发育变化。

Objective： To study the morphology characteristics in growth of palatal and provide normal data in Xihn resi- dents with early normal permanent occlusion. Methods： We builded 3D model of normal permanent occlusion with reverse energinc technique ,then measured them with Geomagic10.0 software on sagittal plane, frontal plane and horizontal plane. At last we compared each group by statistics method. Results： The intermolar distance was larger （P 〈 0.01 ） in males than in females. The height of palate was increased with age increasing in males until 17 years old. Conclusion： The size and the shape of the palate were influenced by gender and age, especially in male.