García-Campos Cecilia, Martinón-Torres María, Martínez de Pinillos Marina, Modesto-Mata Mario, Martín-Francés Laura, Perea-Pérez Bernardo, Zanolli Clément, Bermúdez de Castro José María
Centro Nacional de Investigación sobre la Evolución Humana, Burgos, Spain.
Anthropology Department, University College London, London, United Kingdom.
Am J Phys Anthropol. 2018 Dec;167(4):914-923. doi: 10.1002/ajpa.23715. Epub 2018 Oct 31.
Dental tissue proportions of human permanent canines is one of only a few sexually dimorphic features that is present in childhood and maintained in adults, offering the opportunity for this to be used in sex determination. This study assesses dental tissue volumes and surface areas of maxillary permanent canines in a sample of known sex to provide new data and to explore the potential of these variables as reliable sexual estimators.
The teeth studied here derive from 56 individuals (27 females and 29 males) of known sex and age, and of different geographic origins. The teeth were scanned and three-dimensional (3D) measurements (volumes and surface areas) were obtained. In addition, a discriminant function analysis was applied.
The results presented here concur with those previously published in relation to both size and dental tissue patterns. Male maxillary canines have a greater dentine component, whereas female enamel is thicker, leading to a difference in dental size in favor of males. Discriminant functions were calculated using these histological variables successfully identifying sex in between 87.5% and 93.75% of the known-sex hold-out sample, with 92.3% correctly assigned when all functions were applied together.
The present study supports that methods for sex determination based on dental tissue measurements can achieve high allocation accuracies, being especially useful in the case of subadults or when no other appropriate method is available.
人类恒牙尖牙的牙体组织比例是少数在儿童期出现并在成年期持续存在的性别二态性特征之一，这为其用于性别鉴定提供了机会。本研究评估了已知性别的样本中上颌恒牙尖牙的牙体组织体积和表面积，以提供新的数据并探索这些变量作为可靠性别估计指标的潜力。
本研究使用的牙齿来自56名已知性别和年龄、不同地理来源的个体（27名女性和29名男性）。对牙齿进行扫描并获得三维（3D）测量值（体积和表面积）。此外，还应用了判别函数分析。
此处呈现的结果与先前发表的关于大小和牙体组织模式的结果一致。男性上颌尖牙的牙本质成分更多，而女性的釉质更厚，导致牙齿大小上男性占优。利用这些组织学变量计算判别函数，在已知性别的留出样本中成功识别性别的比例在87.5%至93.75%之间，当综合应用所有函数时，正确分配率为92.3%。
本研究支持基于牙体组织测量的性别鉴定方法可实现较高的分配准确率，在亚成年人情况下或没有其他合适方法可用时尤其有用。
