Dundee Dental School, University of Dundee, Park Place, Dundee, Scotland, DD1 4HN, UK.
Int J Legal Med. 2019 Nov;133(6):1967-1976. doi: 10.1007/s00414-019-02147-5. Epub 2019 Aug 30.
Secondary dentine deposition is responsible for the decrease in the volume of the pulp cavity with age. Therefore, the volume of the pulp cavity can be considered as a predictor for estimating age. The aims of this study were to investigate the relationship strength between canine pulp volumes and chronological age from homogenous (approximately equal numbers of individuals in each age range) age distribution and to assess the effect of sex as predictor in age estimation. This study was performed on 719 subjects of Pakistani origin. Cone beam computed tomography images of 521 left maxillary and 681 left mandibular canines were collected from 368 females and 349 males aged from 15 to 65 years. Planmeca Romexis® software was used to trace the outline of the pulp cavity and to calculate pulp volumes. Regression analysis was performed to assess the correlation between pulp volumes considering with and without sex as a predictor with chronological age. The obtained results showed that mandibular canine pulp volume and sex have the highest predictive power (R = 0.33). The relationship between mandibular canine pulp volume and sex with chronological age demonstrates an odd S-shaped non-linear relationship. A statistically significant difference in volumes of pulp was found (p = 0.000) between males and females. The conclusion was that predictions using the pulp volume of the mandibular canine and sex produced the best estimates of chronological age.
继发性牙本质沉积是导致牙髓腔体积随年龄增长而减小的原因。因此，牙髓腔体积可以被视为估计年龄的预测因子。本研究的目的是调查来自同质（每个年龄组中个体数量大致相等）年龄分布的犬牙髓体积与实际年龄之间的关系强度，并评估性别作为预测因子在年龄估计中的作用。本研究对 719 名具有巴基斯坦血统的个体进行了研究。从 368 名女性和 349 名男性中收集了 521 颗左上颌恒尖牙和 681 颗左下颌恒尖牙的锥形束 CT 图像，年龄在 15 至 65 岁之间。使用 Planmeca Romexis®软件追踪牙髓腔轮廓并计算牙髓体积。进行回归分析以评估考虑有性别和无性别作为预测因子的牙髓体积与实际年龄之间的相关性。研究结果表明，下颌恒尖牙牙髓体积和性别具有最高的预测能力（R=0.33）。下颌恒尖牙牙髓体积和性别与实际年龄之间的关系呈现出一种奇数 S 形的非线性关系。在男性和女性之间，牙髓体积存在统计学上显著的差异（p=0.000）。研究得出结论，使用下颌恒尖牙牙髓体积和性别的预测可以产生最准确的实际年龄估计。
