Drusini A, Calliari I, Volpe A
Department of Biology, University of Padua, Italy.
Am J Phys Anthropol. 1991 May;85(1):25-30. doi: 10.1002/ajpa.1330850105.
Root dentine transparency (RDT) was used to estimate the ages of human subjects from 152 intact teeth. Teeth were from 134 subjects, both historical and recent, of known age and sex. The aims of this work are 1) to compare two methods of using RDT to estimate age; 2) to test the applicability of the regression formulae for estimating age obtained from a recent sample on an historical sample; and 3) to estimate the suitability of RDT to determine age at death of 100-year-old skeletons. RDT was measured by two techniques: 1) computerized densitometric analysis and 2) vernier caliper. Age estimations based on computerized densitometric analysis were no more accurate than were those determined by caliper measurement; both give a predictive success of +/- 5 years in about 45-48% of cases for premolars. The television-based digitization system has some disadvantages: It is expensive, not portable, and requires some training to use. However, it furnishes a more standardized method, a rapid graphic illustration of the results, and an immediate storage of statistical information for future use.
根牙本质透明度（RDT）被用于从152颗完整牙齿估计人类受试者的年龄。这些牙齿来自134名年龄和性别已知的受试者，涵盖历史和近期的样本。这项工作的目的是：1）比较两种使用RDT估计年龄的方法；2）测试从近期样本获得的年龄估计回归公式在历史样本上的适用性；3）评估RDT用于确定100岁骨骼死亡年龄的适用性。RDT通过两种技术进行测量：1）计算机化密度分析和2）游标卡尺。基于计算机化密度分析的年龄估计并不比游标卡尺测量的更准确；对于前磨牙，在约45 - 48%的病例中，两者的预测成功率均为正负5年。基于电视的数字化系统有一些缺点：它昂贵、不便于携带，且使用需要一些培训。然而，它提供了一种更标准化的方法、结果的快速图形展示以及统计信息的即时存储以供未来使用。
