Cameriere Roberto, Ferrante Luigi, Cingolani Mariano
Institute of Legal Medicine, University of Macerata, Macerata, Italy.
J Forensic Sci. 2004 Nov;49(6):1319-23.
This paper discusses a method for assessing adult age based on the relationship between age and measurement of the pulp/tooth area ratio (RA) of the second molar teeth. The sample consisted of 312 Italian white Caucasian patients (135 men, 177 women) aged between 14 and 24 years. Orthopantomograph samples (OPGs) were analyzed by the same observer and calibrated by kappa statistics. Probabilities of an individual being older than 18 years of age (adult age) were derived using measurements of the ratio pulp/tooth area (RA) of the second molar teeth and the dichotomized stages of third molar development (Tm) as explanatory variables. These results were exploited to establish a threshold value to assign an individual to juvenile or adult age. A cut-off value of RA* = 0.088 was applied if Tm = 0 and RA* = 0.097 if Tm = 1. The sensitivity of this test was 91% and its specificity 94.5%. The proportion of individuals with correct classifications was 92%.
本文讨论了一种基于年龄与第二磨牙牙髓/牙面积比（RA）测量值之间的关系来评估成年人年龄的方法。样本包括312名年龄在14至24岁之间的意大利白种人患者（135名男性，177名女性）。由同一名观察者对曲面断层片样本（OPG）进行分析，并通过kappa统计进行校准。使用第二磨牙的牙髓/牙面积比（RA）测量值和第三磨牙发育的二分阶段（Tm）作为解释变量，得出个体年龄大于18岁（成年年龄）的概率。利用这些结果确定一个阈值，以将个体划分为青少年或成年人年龄。如果Tm = 0，则应用RA* = 0.088的临界值；如果Tm = 1，则应用RA* = 0.097的临界值。该测试的灵敏度为91%，特异性为94.5%。正确分类的个体比例为92%。
