颅骨测量与X线头影测量方法的比较研究

A COMPARISON OF CRANIOMETRY AND ROENTGENOGRA-PHIC CEPHALOMETRY

本文对传统的颅骨测量法与口腔医学上使用的X线头影测量法在测量标志点的选取定位及测量结果的差异方面进行了对比研究。测量标志点重叠对比显示颅骨测量中的大多数标志点在X线片上可以较为准确地定位。方差分析表明两种测量方法测量结果差异不显著(P>0.05)。本文就如何准确地在X线片上确定标志点以及测量数据的放大误差问题进行了讨论并提出了将放大率划分为三个等级计算X线头影片测量值的标准。作者认为采用X线头影测量方法进行人类学研究有着良好的应用前景。

Craniometry and roentgenographic cephalometry were carried on three skulls to determine 55 measurement points and do 53 items of measurements respectively in this paper. The overlapping comparison of the measurement points shows that most (83.6%) of the points in craniometry can be determined on cephalometric roentgenograms precisely. Two-way analysis of variance indicates that there are no significant differences between the measurement results obtained by the two methods (P>0.05). Because the definitions of some measurement points are different in the two methods, the authors propose some measurement points should be added and some experienced methods are proposed to determine some points which are difficult to locate because of the overlapping of images in roentgenograms. The present study discovered that according to the positions and distances of points on skull, the amplification rates can be divided into several levels, which can basically reflect actual amplification errors. So the authors proposed that under the condition of standard amplification rate of 11.1%, the rates can be divided into 11.1%, 8.0% and 4.0% to rectify the linear measurement data of roentgenographic cephalometry. The authors believe that roentgenographic cephalometry can be used in the research of physical anthropology and has good prospect in the future.