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首页> 外文期刊>Acta biomaterialia >The geometrical structure of interfaces in dental enamel: A FIB-STEM investigation
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The geometrical structure of interfaces in dental enamel: A FIB-STEM investigation

机译：牙釉质界面的几何结构：FIB-STEM调查

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In this study a high resolution structural analysis revealed that enamel prisms are surrounded by an interface that is discontinuous with frequent mineral to mineral contact separated by gaps. This contact manifests either by crystallites bridging the boundary between prismatic and interprismatic enamel or continuous crystallites curving and bridging the interprismatic enamel to the prisms. The geometrical resolution of this TEM investigation of the interfaces is <= 2 nm as a basis for micromechanical models. Within this resolution, contrary to existing structural descriptions of dental enamel structure in materials science literature, here the crystallites themselves are shown to be either in direct contact with each other, sometimes even fusing together, or are separated by gaps. Image analysis revealed that on average only 57 +/- 15% of the interface consists of points of no contact between crystallites. This work reveals structural features of dental enamel that contribute important understanding to both the architecture and mechanical properties of this biological material. A new structural model is proposed and the implications for the mechanical properties of dental enamel are discussed.
机译：在这项研究中，高分辨率结构分析显示，搪瓷棱镜被频繁矿物与间隙分开的矿物接触不连续的界面包围。这种接触纸张通过微晶桥接棱柱形和口译牙釉质或连续微晶弯曲的边界，并将对棱镜缩小到棱镜。该接口的该TEM调查的几何分辨率为<= 2nm作为微机械模型的基础。在该分辨率内，与材料科学文献中的牙齿搪瓷结构的现有结构描述相反，结晶本身被示出为彼此直接接触，有时甚至融合在一起，或者通过间隙分离。图像分析显示，平均仅57 +/- 15％的界面包括微晶之间的无接触点。这项工作揭示了牙釉质的结构特征，对这种生物材料的建筑和机械性能有助于重要的理解。提出了一种新的结构模型，讨论了对牙釉质力学性能的影响。

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