Laboratory for Forensic Odontology Research, School of Dental Medicine, SUNY at Buffalo, S. Campus, Buffalo, NY 14214, USA.
Int J Legal Med. 2011 Nov;125(6):779-84. doi: 10.1007/s00414-010-0507-8. Epub 2010 Sep 4.
Uniqueness of the human dentition is a fundamental premise in bitemark analysis. Despite the importance of this key aspect of bitemark methodology, systematic studies of large populations have been limited. Furthermore, there have been no investigations of the significance of the third dimension with regard to dental uniqueness. One hundred digitally scanned mandibular models were analyzed in both 2D and three dimension (3D) using Landmark software. Additionally, 500 3D maxillary and mandibular sets were investigated for determining dental match rate. Statistical analysis was performed with geometric morphometric methods. Results show that measurements in 3D preserve more information about the dentition, reducing but not eliminating random matches in a sample population of 100 mandibular dentitions. Examination of pairs of maxillary and mandibular dentitions showed a substantial number of random matches (197 maxillary, 51 mandibular, one of both maxillary and mandibular). Conclusions indicate that a zero match rate cannot be claimed for the population studied.
人类牙列的独特性是咬痕分析的一个基本前提。尽管这是咬痕分析方法学的一个关键方面，但针对大人群的系统研究却十分有限。此外，尚未有研究关注三维视角对牙齿独特性的意义。本研究采用 Landmark 软件对 100 个数字化扫描的下颌模型进行了二维和三维分析。此外，还对 500 套上颌和下颌模型进行了研究，以确定牙齿匹配率。使用几何形态测量方法进行了统计分析。结果表明，三维测量保留了更多关于牙齿的信息，减少了但并未消除 100 个下颌牙列样本中的随机匹配。对上颌和下颌牙列对的检查显示出大量的随机匹配（197 个上颌，51 个下颌，1 个上颌和 1 个下颌）。研究结论表明，对于所研究的人群，不能声称存在零匹配率。
