De Vito C, Saunders S R
Department of Anthropology, McMaster University, Hamilton, Ontario, Canada.
J Forensic Sci. 1990 Jul;35(4):845-58.
Studies of deciduous teeth have concluded that crown size differences in these teeth between males and females are not reliable sex discriminators, in contrast to such differences in permanent teeth. This study measured the mesiodistal and faciolingual crown diameters of all deciduous teeth, as well as those of the permanent first molars, of 162 children from the Burlington Orthodontic Growth Study, conducted earlier in Burlington, Ontario, Canada. All 40 deciduous tooth diameters (20 mesiolingual and 20 faciolingual) were significantly different between the sexes, as were the permanent tooth diameters. Using three to five measurements of deciduous teeth, discriminant analyses of several samplings of these children produced discriminant functions in which 76 to 90% of the holdout samples were correctly classified by sex. Combinations of deciduous and permanent measurements were used to classify 83 to 85% of the holdout samples correctly. When compared with published data on other sample populations, the Burlington group is the most dimorphic for deciduous teeth and is within the range of permanent tooth dimorphisms of other populations. The level of classification accuracy, when using discriminant analysis of the deciduous teeth, can approach the accuracy levels of analysis using the permanent teeth.
对乳牙的研究得出结论，与恒牙的差异不同，这些牙齿在男性和女性之间的冠部大小差异并非可靠的性别判别指标。本研究测量了来自加拿大安大略省伯灵顿早期进行的伯灵顿正畸生长研究中162名儿童的所有乳牙以及第一恒磨牙的近远中径和颊舌径。所有40个乳牙直径（20个颊舌径和20个近远中径）在性别之间均存在显著差异，恒牙直径也是如此。对这些儿童的几个样本进行判别分析，使用三到五次乳牙测量，得出的判别函数能将76%至90%的保留样本按性别正确分类。乳牙和恒牙测量的组合能将83%至85%的保留样本正确分类。与其他样本群体的已发表数据相比，伯灵顿组乳牙的两性差异最大，且处于其他群体恒牙两性差异的范围内。使用乳牙判别分析时的分类准确率水平可接近使用恒牙分析的准确率水平。
