探索最佳方法来估计死亡时的年龄,使用肉皮/牙面积比:南非的一项研究
Daniël Kotze1, Calvin G Mole2, Vincent M Phillips3
1Division of Clinical Anatomy and Biological Anthropology, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Private Bag X3, Observatory, Cape Town, 7935, South Africa.
International journal of legal medicine
|November 1, 2024
概括
纸/牙面积比率 (PAR) 方法可靠地估计了南非成年人死亡时的成年年龄. 牙切片图像和不包括牙面膜区域,提高了这个法医牙科技术的准确性.
科学领域:
- 法医人类学 法医人类学
- 法医牙科 法医牙科
- 生物考古学的生物考古学
背景情况:
- 准确的死亡年龄估计对于在法医调查中识别未知的人类遗骸至关重要.
- 纸/牙面积比率 (PAR) 方法,基于二次牙附着,是成年牙年龄估计的常用技术.
- 图像成像方式和质包含对PAR方法准确性的影响需要进一步研究.
研究的目的:
- 评估南非成年人年龄估计PAR方法的可靠性,性别偏见和准确性.
- 评估不同图像类型 (射线图,牙截图) 和牙面积包含在 PAR 方法性能上的影响.
- 确定在法医背景下将PAR方法应用于上犬的最佳方法.
主要方法:
- 一项观察性,横截面研究分析了52只来自南非尸体样本的成年上犬.
- 使用ImageJ来计算PARs,分析了双舌唇和半舌唇外周放射图以及双舌唇立体显微镜牙切片图像.
- 对于每个图像类型,带有或没有质区域,为年龄估计开发了线性回归模型,并使用最佳子集回归和交叉验证进行了比较.
主要成果:
- PAR方法证明了可靠性和性别独立性,为研究人口提供了相对准确的死亡年龄估计.
- 图像类型显著影响了准确性,牙截面图像产生了最小的误差,其次是嘴唇舌头和半径距离放射.
- 除了质区域,在所有测试的图像类型中始终提高了模型性能.
结论:
- PAR方法是一种可行且准确的技术,用于估计南非成年人的死亡年龄,特别是在使用牙截图图像时.
- 排除面膜区域可以提高基于PAR的年龄估计模型的准确性.
- 这项研究为南非的法医牙科提供了有价值的数据,并完善了用于估计牙年龄的立体显微镜分析.
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