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.
出处
《第四军医大学学报》
北大核心
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)
