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目的探讨青铜铁器时代新疆、内蒙古地区人群下颌骨第一磨牙(M1)的磨耗特点。方法根据磨耗程度进行分级,将新疆(77例)、内蒙古(123例)地区的牙齿磨耗进行比较,并同时对比近代人群(云南、华北共134例),用SPSS13.0软件对磨耗级别分数进行均值计算和各组间差异的显著性检验。结果青铜铁器时代的新疆、内蒙古人群牙齿磨耗度都大于近代人群,提示当时食物可能较近代人坚硬。新疆的牙齿磨耗度大于内蒙古地区,可能反映了食物结构、经济方式的差异。新疆人群牙齿磨耗度左右侧相似,性别差异显著,内蒙古人群牙齿磨耗也是左右侧相似、性别差异显著,提示这可能是青铜铁器时代牙齿磨耗的共性,但还需更多遗址标本来检验。结论青铜铁器时代的牙齿磨耗大于近代,新疆、内蒙古人群牙齿磨耗存在差异。
Objective To investigate the wear characteristics of mandibular first molar (M1) in Xinjiang and Inner Mongolia during the Bronze Age. Methods According to the degree of wear, the tooth wear in Xinjiang (77 cases) and Inner Mongolia (123 cases) was compared. At the same time, compared with the modern population (134 cases in Yunnan and North China), the wear grade scores Mean calculation and significance test of differences between groups. Results Bronze Age of Xinjiang, Inner Mongolia, the degree of tooth wear is greater than the modern population, suggesting that the food may be more recent generations of hard. The tooth wear rate in Xinjiang is greater than that in Inner Mongolia, which may reflect the difference in food structure and economy. In Xinjiang, the tooth wear rate is similar on the left and right, with significant gender differences. The tooth wear in Inner Mongolia is also similar to the left and right, with significant gender differences. It suggests that this may be the common feature of tooth wear in bronze iron age, but more site specimens are needed for testing. Conclusion The tooth wear in bronze iron age is greater than that in modern times. The tooth wear in Xinjiang and Inner Mongolia are different.