Kaifu Y
Department of Anthropology, National Science Museum, Sinjuku-ku, Tokyo 169-0073, Japan.
Am J Phys Anthropol. 1999 Aug;109(4):485-99. doi: 10.1002/(SICI)1096-8644(199908)109:4<485::AID-AJPA5>3.0.CO;2-K.
Although a number of studies have been performed on interpopulational variation of tooth wear patterns in recent humans, the major interest in the study of tooth wear so far has been in reconstructing the subsistence and behavior of prehistoric populations, and hence research on wear pattern changes in historic times has been superficial. The present study investigated temporal change in the pattern of wear on the permanent dentition of the Japanese through comparison of the following five groups: prehistoric hunter-gatherers, prehistoric agriculturists, medieval, premodern, and recent populations. The pattern of reduction of occlusal wear severity across these chronological groups was not similar between the anterior and posterior portions of the dentition. Occlusal wear on the anterior teeth was noticeably lighter in the prehistoric agriculturists and later populations than in the prehistoric hunter-gatherers, while clear reduction of occlusal wear on the posterior teeth occurred after medieval times. The temporal variations in the degree of mesiodistal crown diameter loss due to wear and its anterior-posterior gradient within the dentition are generally consistent with those observed in the occlusal wear pattern. Possible causative factors of these temporal changes in the wear pattern are discussed.
尽管最近有许多关于现代人牙齿磨损模式种群间差异的研究，但迄今为止，牙齿磨损研究的主要兴趣在于重建史前人群的生存方式和行为，因此对历史时期磨损模式变化的研究一直很肤浅。本研究通过比较以下五组人群，调查了日本人恒牙列磨损模式的时间变化：史前狩猎采集者、史前农耕者、中世纪人群、近现代之前的人群和近现代人群。在这些按时间顺序排列的人群中，牙列前后部咬合磨损严重程度的降低模式并不相似。史前农耕者及之后人群的前牙咬合磨损明显比史前狩猎采集者轻，而后牙的咬合磨损在中世纪之后明显减轻。由于磨损导致的牙冠近远中直径损失程度的时间变化及其在牙列中的前后梯度，通常与咬合磨损模式中观察到的情况一致。本文还讨论了这些磨损模式随时间变化的可能成因。
