年龄估计是识别人类尸体的重要步骤。由于衰老会引起形态学变化,因此已经突出显示了一些下颌标志作为年龄估计的骨骼部位。报告表明,下颌圆环的大小可能与衰老有关;然而,由于测量困难,尚未进行彻底的调查。因此,本研究旨在利用日本尸体的死后计算机断层扫描数据确定年龄与下颌环面厚度之间的关系.这项研究包括2,792具尸体,平均(标准差)年龄为58.0(22.4)岁(范围,0-101岁)和67.6%的男性。Further,2,662(95.3%),14(0.5%),59(2.1%),和57(2.0%)的尸体是永久性的,混合,小学,和牙列前期,分别。进行了多变量分析,以量化年龄对下颌圆环厚度的影响,适应性,高度,体重,和咬合接触状态。该模型还包括年龄和咬合状态之间的相互作用项,因为咬合可能会产生影响。多元回归分析结果显示,下颌环面厚度随年龄增长而增加(回归系数(95%置信区间)为0.6(0.2-1.0),0.7(0.3-1.0),1.0(0.6-1.4),1.3(0.9-1.7),1.3(0.8-1.8),30-39、40-49、50-59、60-69、70-79和80-89岁年龄组的1.1(0.4-1.7),分别),尤其是有咬合接触的男性。下颌圆环厚度与年龄之间存在显着关联,通过咬合状态和性别改变,已确定。因此,有关下颌圆环厚度和咬合状态的数据可能对人体尸体的年龄估计有用。
Age estimation is an essential step in identifying human corpses. Several mandibular landmarks have been highlighted as skeletal sites for age estimation since aging causes morphological changes. Reports suggest that mandibular torus size may be associated with aging; however, thorough investigation has not been performed owing to the difficulty in measuring it. Therefore, this study aimed to determine the association between age and mandibular torus thickness using postmortem computed tomography data from Japanese corpses. This study included 2,792 corpses with mean (standard deviation) age of 58.0 (22.4) years (range, 0-101 years) and 67.6 % males. Further, 2,662 (95.3 %), 14 (0.5 %), 59 (2.1 %), and 57 (2.0 %) corpses were in the permanent, mixed, primary, and predental dentition periods, respectively. Multivariable analysis was performed to quantify the impact of age on mandibular torus thickness, adjusting for sex, height, weight, and occlusal contact status. The model also included an interaction term between age and occlusal status because of the potential effect modification by occlusion. Results of the multivariable regression analysis showed that mandibular torus thickness increased with age (the regression coefficients (95 % confidence interval) were 0.6 (0.2-1.0), 0.7 (0.3-1.0), 1.0 (0.6-1.4), 1.3 (0.9-1.7), 1.3 (0.8-1.8), and 1.1 (0.4-1.7) for age groups 30-39, 40-49, 50-59, 60-69, 70-79, and 80-89 years, respectively), especially in males with occlusal contact. A significant association between mandibular torus thickness and age, modified by occlusal status and sex, was identified. Therefore, data regarding the thickness of the mandibular torus and occlusal status may be useful for age estimation in human corpses.