Department of Oral Pathology, S.D.M. College of Dental Sciences and Hospital Sattur, Dharwad, India.
Forensic Sci Int. 2009 Nov 20;192(1-3):129.e1-5. doi: 10.1016/j.forsciint.2009.08.008. Epub 2009 Sep 9.
Sex determination of unidentified skeletal remains is important and various hard-tissue parameters have been evaluated towards this end. The dentition is considered as a useful adjunct in skeletal sex determination, particularly since teeth are resistant to postmortem destruction and fragmentation. Sex dimorphism in tooth size and the accuracy of odontometric sex prediction, is found to vary in different regions and researchers have advocated the need for population-specific data. No odontometric standards exist for Indians for use in forensic sex prediction. Therefore, this study examined sexual dimorphism in Indians using univariate and multivariate statistics. Mesiodistal (MD) and buccolingual (BL) measurements of all teeth, except third molars, were obtained on dental casts of [corrected] 105 Indians (52 females, 53 males). The canines were [corrected] found to be the most dimorphic tooth, followed by the [corrected] BL dimensions of [corrected]first molars and that of mandibular second premolars. In general, mandibular teeth and BL dimensions showed greater tendency to be larger in males. However, just over a quarter of the measured variables (16/56; 28.6%) were statistically larger in males (p < 0.05). Moreover, ten tooth variables exhibited reverse dimorphism, i.e. female dimensions were larger than those of males. Stepwise discriminant function analysis revealed moderate accuracy in sex prediction: the teeth from both jaws taken together were able to determine sex to higher levels (76.2%) compared to only mandibular teeth (72.4%) or only maxillary teeth (67.6%). Interestingly, teeth that contributed to the stepwise discriminant analysis were either statistically larger in males or exhibited reverse dimorphism, indicating that such tooth variables may have better ability to correctly identify sex. [corrected]
性别鉴定对于身份不明的骨骼遗骸非常重要，为此已经评估了各种硬组织参数。牙齿被认为是骨骼性别鉴定的有用辅助手段，尤其是因为牙齿具有抗死后破坏和碎裂的能力。在不同地区，牙齿大小的性别二态性和牙测量法性别预测的准确性存在差异，研究人员主张需要特定人群的数据。目前还没有针对印度人的牙测量法标准可用于法医性别预测。因此，本研究使用单变量和多变量统计方法检查了印度人的性别二态性。在 105 名印度人（52 名女性，53 名男性）的牙模上测量了所有牙齿（除第三磨牙外）的近中-远中（MD）和颊舌（BL）尺寸。结果发现，犬齿是最具二态性的牙齿，其次是第一磨牙的 BL 尺寸和下颌第二前磨牙的 BL 尺寸。一般来说，下颌牙齿和 BL 尺寸在男性中更大。然而，只有超过四分之一的测量变量（16/56；28.6%）在统计学上大于男性（p<0.05）。此外，有十个牙齿变量表现出相反的二态性，即女性尺寸大于男性尺寸。逐步判别函数分析显示出中等的性别预测准确性：来自上下颌的牙齿一起可以更准确地确定性别（76.2%），而仅使用下颌牙齿（72.4%）或上颌牙齿（67.6%）则准确性较低。有趣的是，有助于逐步判别分析的牙齿要么在统计学上大于男性，要么表现出相反的二态性，这表明这些牙齿变量可能具有更好的正确识别性别的能力。
