Posgraduate Specialty in Forensic Dentistry, Faculty of Dentistry - Universidad Científica del Sur, Lima, Perú.
J Forensic Odontostomatol. 2023 Apr 30;41(1):19-26.
Age estimation is an important forensic resource in human identification. Amongst the different methods of dental age estimation, root dentin transparency (RDT) is considered a reliable parameter, as well as an indicator of chronological age at time of death in human adult remains. The aim of this study was to estimate the age of individuals using the Bang and Ramm method and to derive a new formula suitable for age estimation in the Peruvian population by assessing the length and percentage length of RDT.
The sample consisted of 248 teeth collected from 124 deceased individuals, between the ages of 30 and 70 years. RDT length was digitally measured from sectioned and photographed teeth. Linear and quadratic regressions were made to derive Peruvian formulae and the new formulae were applied to another group of samples (n=30).
Data showed a significant correlation (p<0.01) between chronological age and translucency length (Pearson´s correlation=0.775) and percentage length (Pearson´s correlation=0.778). Linear and quadratic regressions for obtaining Peruvian formulae showed that quadratic equations expressed greater determination coefficients. Comparisons between estimated age using Peruvian formulae showed that dental age from percentage of length of RDT a higher percentage of estimates with errors <± 05 and <± 10 years. The accuracy of the new Peruvian formula using the percentage of length of RDT (MAE=7.83) can be considered acceptable.
As shown in the results, age estimation using the Peruvian formula derived from the percentage of length of RDT has proven to be more accurate than estimates using the Bang and Ramm method. Thus, it could be used in age estimation for Peruvian individuals, as it is the most accurate methods and provides a larger number of acceptable estimates.
年龄估算是人类鉴定中重要的法医学资源。在不同的牙齿年龄估测方法中，根牙本质透明度（RDT）被认为是一种可靠的参数，也是成人遗骸死亡时的实际年龄的一个指标。本研究的目的是使用 Bang 和 Ramm 方法来估算个体的年龄，并通过评估 RDT 的长度和百分比长度来推导出适合秘鲁人群的新公式。
样本由 124 名年龄在 30 至 70 岁之间的死者的 248 颗牙齿组成。RDT 的长度通过对切片和拍摄的牙齿进行数字测量。进行线性和二次回归以推导出秘鲁公式，并将新公式应用于另一组样本（n=30）。
数据显示，实际年龄与透明度长度（皮尔逊相关系数=0.775）和百分比长度（皮尔逊相关系数=0.778）之间存在显著相关性（p<0.01）。获得秘鲁公式的线性和二次回归表明，二次方程表达了更大的确定系数。使用秘鲁公式估算年龄的比较表明，使用 RDT 百分比长度的牙齿年龄具有更高比例的误差<±0.5 年和<±1.0 年的估计值。使用 RDT 百分比长度的新秘鲁公式的准确性（MAE=7.83）可以认为是可以接受的。
如结果所示，使用 RDT 百分比长度推导出的秘鲁公式进行年龄估计比使用 Bang 和 Ramm 方法进行估计更准确。因此，它可用于秘鲁人群的年龄估计，因为它是最准确的方法，并提供了更多可接受的估计值。
