中国人牙齿形态测量分析——华北近代人群臼齿齿冠及齿尖面积

本文采用数字摄影和图像分析技术对华北新石器时代人类上、下颌臼齿齿冠及齿尖基底面积进行了精确测量。在此基础上, 计算了相对齿尖基底面积。结果显示: 近代华北人上颌各臼齿齿尖大小均呈原尖>前尖>后尖>次尖的顺序, 下颌三个臼齿齿尖大小面积顺序有所不同; 上颌的后尖和次尖呈现异速生长的趋势。各臼齿齿尖相对面积的总体变异呈下颌臼齿大于上颌臼齿、M1到M3依次增加、靠近远中侧的齿尖大于近中侧的齿尖的趋势。本文首次对现代中国人臼齿相对齿尖面积进行了调查统计, 为古人类学及体质人类学研究积累了基础性数据。本研究显示利用数字摄影和图像分析技术对包括臼齿齿冠和齿尖面积在内的非线性特征进行精确的定量分析较传统的测量方法具有明显的优越性, 在古人类学和体质人类学研究中有广泛的应用前景。

Morphometric Analysis of Chinese Teeth:Molar Crown and Cusp Areas of a Recent North Chinese Population

Studies of the molar crown basal area and relative basal cusp area in human evolutionary research has been important but it has been difficult to measure precisely the occlusal or cusp areas of the teeth.In recent years,advances in computer technology have made it possible to quantify some of these complex traits.With the combination of digital photography and advanced computer software,two non-linear morphologies,absolute occlusal area and relative basal cusp area(RBCA),of maxillary and mandibular molars o...