摘要
目的:调查距今约3 000年前出土人牙齿的磨耗状况,并通过与当代人牙齿磨耗状况进行对比性研究,以探求3 000年来人牙齿磨耗的演变规律及其影响因素。方法:采用Smith和Knight牙齿磨耗指数TW I分度方法,分年龄段观察记录了99例陕西长安区出土的3 000年前人颅骨标本中1 255个恒牙切缘和咬合面的磨耗度,并与416例当代人群牙齿平均磨耗程度进行比较。结果:3 000年前出土人不同年龄段各个牙位牙齿的平均磨耗程度均明显高于当代人,其差异具有显著性(P<0.05)。和当代人相比,3 000年前人前牙相对后牙磨耗程度偏重。结论:随着人类社会文明的发展,牙齿磨耗程度减轻,其中前牙相对后牙磨耗程度减轻更加明显。
AIM： To investigate the tooth wear state of permanent tooth from human samples about 3000 years ago, compare it with the state of modern people and research the evolutional rule and influential factors of human tooth wear from 3000 years ago to nowadays. METHODS：The Smith and Knight tooth wear index （TWI） was applied to assess the degree of the ineisal and occlusal surface wear of total 1255 teeth from 99 samples （ unearthed at the Chang＇an disttriet of Shan＇xi province）about 3000 years ago by differernt age groups , then statististically compared them with the average tooth wear of 416 modern persons. RESULTS：In each different age groups, the average attrition gradation of each tooth from 3000 year ago was higher than the gradation of 416 modern adults. The variance was significant（P 〈0.05）. In comparion with modem people, the anterior teeth samples from 3000 years ago were worn to a greater degree of attrition than the posterior teeth. CONCLUSION ： With the development of human civilization, the degree of tooth wear decreases, but compared with posterior teeth, the anterior teeth decreases more apparently.
出处
《牙体牙髓牙周病学杂志》
CAS
北大核心
2009年第4期222-225,共4页
Chinese Journal of Conservative Dentistry
基金
西安市社发攻关项目(GG05165)
