Anthropological Studies on the Palatal Shapes Using Moire topography

从口腔人类学的角度描述蒙古人种牙弓和上颚的三维结构。所用材料为上颌牙列石膏模（日本男性：52，女性：51；菲律宾男性：53，女性：56；雅美部落男性：48，女性：42）。采用栅格间距为1mm的云纹地形学方法对铸件照片进行了研究。结果总结如下：1。拱宽的两性二态性大于拱长。在三个人群中，日本人的拱门尺寸最大。雅美部落的拱门宽度相对较大，其绝对尺寸与日本人几乎相同。腭顶高度的两性二态性表现为后区大于前区。雅米族腭顶高度最大，菲律宾族次之，日本族最小。在额面上，日本人的颈椎向中平面的倾斜度高于其他两个民族。选择适宜于种群变异调查的腭弓尺寸和腭顶高度测量值。(1)弓的尺寸：弓弦和长度，形状：弓宽。(2)腭穹窿高度。尺寸：前后腭穹窿倾斜，形状：侧腭穹窿倾斜

The three-dimensional structures of the dental arch and palate of the Mongoloid populations were described from dental anthropological point of view. The materials used were plaster casts of maxillary dentitions (Japanese male : 52, female : 51 ; Filipino male : 53, female : 56 ; Yami tribe male : 48, female : 42). Photographs of the casts were studied moire topographical method with a grid interval of 1mm.The results were summarized as follows :1. The arch widths were shown larger sexual dimorphism than the arch lengths. Japanese had largest arch dimensions in the three populations. Yami tribe had relatively large arch widths, whose absolute sizes were almost the same as Japanese.2. Sexual dimorphism of the palatal vault heights showed larger in the posterior region than in the anterior. The palatal vault heights of Yami tribe had the largest values, followed by those of Filipino, and those of Japanese which were the least. On the frontal plane Japanese was shown more inclination from the cervical area to the midplane than the other two populations.3. The suitable measurements of the arch dimension and palatal vault heights for the investigation of the population variability were selected.(1) Arch dimensions Size : arch chords and length, Shape : arch widths(2) Palatal vault heights Size : anteroposterior palatal vault inclination, Shape : lateral palatal vault inclination