采用光学显微镜、能谱扫描电镜、高分辨透射电镜以及纳米力学探针等设备对人体牙齿的显微组织及纳米力学性能进行了研究.结果表明:牙本质由规则排列的牙本质小管和基质组成,牙釉质由不同方向的釉柱及柱间质组成,牙本质与牙釉质之间有明显的界面;牙釉质中的Ca和P含量明显高于牙本质中的含量,而C含量明显低于牙本质中的含量.牙釉质中发现有大量的磷灰石晶体结构,而牙本质中则明显缺少.力学性能结果显示,牙釉质的纳米硬度平均为4.4GPa,弹性模量为81GPa,而牙本质的纳米硬度平均为1.0GPa,弹性模量为26GPa.牙釉质高的硬度和弹性模量与含有大量的羟基磷灰石晶体组织有关,Ca和P促进了该晶体组织形成.
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