Kaidonis J A, Richards L C, Townsend G C
Department of Dentistry, University of Adelaide, South Australia.
J Oral Rehabil. 1993 May;20(3):333-40. doi: 10.1111/j.1365-2842.1993.tb01615.x.
The nature and frequency of dental wear facets were studied in a sample of 18-year-old Aborigines, 28 males and 31 females, living at Yuendumu in the Northern Territory of Australia. Facet frequencies were scored indirectly using dental models for all permanent teeth, except third molars, and evidence of non-masticatory tooth grinding in eccentric jaw positions was also recorded. The interplay between attrition and abrasion in an individual over time was assessed by examining facet appearance on serial dental models obtained at approximately yearly intervals from 7 to 25 years of age. Facetting was found to be a very common feature of the Aboriginal dentitions, with frequencies ranging from around 65% for pre-molars to about 90% for molars. Evidence of extreme mandibular movement was noted in 93% of males and 100% of females. The longitudinal observations indicated that wear facet definition varied over time, apparently due to episodes of tooth grinding superimposed on continually-acting abrasive influences. These results show that facetting on teeth associated with extreme mandibular positions and, by inference, the related behaviour of tooth grinding or bruxism are very common features in dentitions of Australian Aboriginals living an essentially non-industrial way of life.
对居住在澳大利亚北领地云杜姆的18岁原住民（28名男性和31名女性）样本的牙齿磨耗小平面的性质和频率进行了研究。除第三磨牙外，使用所有恒牙的牙模间接对小平面频率进行评分，并记录了在偏颌位置非咀嚼性磨牙的证据。通过检查从7岁到25岁大约每年获取的连续牙模上的小平面外观，评估个体随着时间推移磨耗和磨损之间的相互作用。发现小平面是原住民牙列中非常常见的特征，前磨牙的频率约为65%，磨牙约为90%。在93%的男性和100%的女性中观察到极端下颌运动的证据。纵向观察表明，磨损小平面的特征随时间变化，显然是由于在持续作用的磨蚀影响之上叠加了磨牙发作。这些结果表明，与极端下颌位置相关的牙齿上的小平面以及由此推断的磨牙或磨牙症相关行为是生活在基本非工业化生活方式的澳大利亚原住民牙列中非常常见的特征。
