A Statistical Analysis of Geographical Variation in Dental Size

牙齿尺寸地理差异的统计分析

• 批准号: 61540604
• 负责人: MIZOGUCHI Yuji
• 金额: $ 0.45万
• 依托单位: National Science Museum, Tokyo.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540604/
• 关键词: Permanent Teeth; Mesiodistal Crown Diameters; Buccolingual Brown Diameters; Multivariate Analysis; Biological Distances; human Populations; Georgaphical Variation; 食性; 歯冠近遠心径; 歯冠頬舌径

The purposes of this project are to descride the geographical variation of dental size in modern human populations world-wide and to examine how the dental size variation has been affected by such factors as food habits.The data on the means and standard deviations of the mesiodistal and buccolingual crown diameters of permanent teeth were collected from the literature, resulting in the accumulation of the data for 152 male and 113 female samples. These data are kept in the form of datasets on the life of the HITAC M-680H computer of the computer centre, the University of Tokyo,and permitted for all users of this computer to use.On the basis of the above data, the patterns of variation in the proportion of dental size through the dentition were examined by cluster analysis using penrose's shape distance. This analysis suggested that the dental size variation was influenced by some factors such as food habits which were associated with the way of life. In the next place, therefore,ecological correlations between dental size and foodstuff intakes were estimated. As a result, relatively high positive correlations were found between several mesiodistal crown diameters on the one hand and on the other hand,potatoes or something like that as well as beef,and relatively high negative ones were recognized between the buccolingual crown diameters of some premolars and molars and wheat as well as mutton. These facts suggest an important role of food habits in determining dental size.

本研究的目的是描述现代人牙齿大小在世界范围内的地理变异，并研究饮食习惯等因素对牙齿大小变异的影响。从文献中收集恒牙近远中冠径和颊舌冠直径的平均值和标准差的数据，积累了152名男性和113名女性的数据。这些数据以数据集的形式保存在东京大学计算机中心的HITAC M-680H计算机上，并允许该计算机的所有用户使用。在此基础上，利用彭罗斯形状距离进行聚类分析，以检验牙齿大小比例在整个牙列中的变化规律。这一分析表明，牙齿大小的变化受到与生活方式有关的饮食习惯等因素的影响。其次，因此，估计了牙齿大小和食物摄入量之间的生态相关性。结果表明，几个近远中冠径与马铃薯或类似物以及牛肉之间存在较高的正相关，而一些前磨牙和磨牙的颊舌冠直径与小麦和羊肉之间存在较高的负相关。这些事实表明，饮食习惯在决定牙齿大小方面起着重要作用。