Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Am J Forensic Med Pathol. 2022 Mar 1;43(1):46-51. doi: 10.1097/PAF.0000000000000735.
Different techniques for sex prediction are developed and used in the forensic medicine field. One of these methods is based on the teeth morphometry. The aim of the present study was to evaluate the degree of sex determination of the maxillary and mandibular first molar teeth in cone beam computed tomography images.
This study was carried out on cone beam computed tomography images of 100 men and 100 women with a mean age of 21.28 ± 2.47 years. The roof, floor and height of pulp chamber, as well as marginal enamel thickness and dentin thickness at the height of contour, tooth width, and crown length were measured. Student t test and discriminant analysis were applied to assess the differences in the measured parameters between men and women.
According to the present study, the maxillary first molar was more dimorphic than the mandibular teeth. The accuracy of sex identification of mandibular and maxillary first molar tooth was 84% and 77%, respectively. The mesiodistal measured variables were more accurate in sexual differentiation than the buccolingual ones. For sex differentiation, the most dominant variables for maxillary and mandibular first molar teeth were crown height and dentin thickness, respectively.
The first molar tooth showed an acceptable level of sex determination accuracy based on the odontometric measurements.
不同的性别预测技术在法医学领域得到了发展和应用。其中一种方法基于牙齿形态测量学。本研究旨在评估上颌和下颌第一磨牙在锥形束 CT 图像中的性别判断程度。
本研究对 100 名男性和 100 名女性的锥形束 CT 图像进行了研究，平均年龄为 21.28±2.47 岁。测量了牙髓腔的顶、底和高度，以及轮廓高度处的边缘釉质厚度和牙本质厚度、牙宽度和冠长。应用 Student t 检验和判别分析评估了男性和女性之间测量参数的差异。
根据本研究，上颌第一磨牙比下颌牙齿更具有二态性。下颌和上颌第一磨牙的性别识别准确率分别为 84%和 77%。颊舌向测量变量比近远中向测量变量在性别分化中更准确。对于性别分化，上颌和下颌第一磨牙最主要的变量分别是牙冠高度和牙本质厚度。
基于牙测量学，第一磨牙的性别判断具有可接受的准确性。
