两千年前人与当代人上颌第二前磨牙牙釉质厚度和密度的对比观察  

Comparative study of thickness and mineral density of enamel of the maxillary second premolars between the people living 2000 years ago and the contemporaries

作　　者：杨香菊 邵金陵 段清波[2] 卢娟[3] 

机构地区：[1]第四军医大学口腔医院正畸科 [2]陕西省考古研究所秦陵考古队,陕西西安710054 [3]第四军医大学预防医学系流行病学教研室,陕西西安710033

出　　处：《第四军医大学学报》2008年第3期211-213,共3页Journal of the Fourth Military Medical University

基　　金：西安市社发攻关项目(GG05165)

摘　　要：目的:通过对两千年前人与当代人上颌第二前磨牙牙釉质厚度和密度的比较,探寻两千年来牙釉质厚度和密度的变化.方法:运用Micro-CT对两千年前古人及当代人各10颗上颌第二前磨牙进行扫描,三维重建后测量不同部位牙釉质的厚度和密度.结果:和两千年前古人相比,当代人上颌第二前磨牙颊尖、舌尖、颊尖区咬合侧、舌尖区咬合侧以及中央窝处牙釉质厚度均变大(P<0.05),当代人舌尖及面中央窝处牙釉质密度增加(P<0.05).结论:在咬合面,牙釉质厚度和密度可能呈现出不断增大的趋势.AIM： To measure the thickness and mineral density of enamel of the maxillary second premolars of the contemporaries and the people living 2000 years ago. METHODS： The thickness and mineral density of enamel were measured by Micro-CT at the different positions of the maxillary second premolars （n = 10 in each group） of the contemporaries and the people living 2000 years ago. RESULTS： The maximum enamel thickness of the cusp region and the enamel thickness of the occlusal fossa of the maxillary second premolars in the contemporaries were higher than those of the people living 2000 years ago （ P 〈 0. 05 ）. The mineral density of the lingual cusp region and the occlusal fossa of the maxillary second premolars in the contemporaries was higher than that of the people who lived 2000 years ago （ P 〈 0.05 ）. CONCLUSION： The thickness and mineral density of enamel may have an increasing tendency with the time elapsing.

关 键 词：前磨牙 牙釉质 MICRO-CT 

分 类 号：R783.5[医药卫生—口腔医学]