Helm S, Prydsö U
Scand J Dent Res. 1979 Apr;87(2):79-90. doi: 10.1111/j.1600-0722.1979.tb00658.x.
Stages of occlusal attrition of the permanent mandibular molars were recorded in 235 Danish medieval skulls, 52 of which were in various states of mixed dentition. For the first and second molar, ages at emergence and ages at occurrence of the earlier stages of attrition were estimated from the mixed dentitions, on the assumptions 1) that the age at eruption of a given number of permanent teeth was similar in medieval and contemporary Danish children, and 2) that the rate of attrition was similar for the first and second molars. Estimation of ages at occurrence of the later attrition stages and of the age at third molar emergence was based on percentage frequency distributions of the stages of attrition using reiterative calculating procedures. Third molar emergence was estimated at the early age of 14 years. It is argued that assessments of age-at death could be made fairly accurately for the age range 5-30 years, and with decreasing accuracy until about 40 years of age.
在235个丹麦中世纪头骨中记录了恒牙下颌磨牙的咬合磨损阶段，其中52个处于不同的混合牙列状态。对于第一和第二磨牙，根据混合牙列估计出牙年龄和早期磨损阶段出现的年龄，假设如下：1）中世纪和当代丹麦儿童中一定数量恒牙的萌出年龄相似；2）第一和第二磨牙的磨损率相似。后期磨损阶段出现的年龄和第三磨牙萌出年龄的估计基于使用迭代计算程序的磨损阶段百分比频率分布。第三磨牙萌出估计在14岁的早期。有人认为，对于5至30岁的年龄范围，可以相当准确地进行死亡年龄评估，直到大约40岁时准确性逐渐降低。
