Abstract

Dentin in the human tooth is a natural composite material with a complex multilevel hierarchical structure and consists of micro and nanostructures that are related to each other in a complex interrelation governed by laws that have not been fully understood yet. To identify the relationship between the dentin structure and its mechanical properties, we study samples prepared from human molars after subjecting them to uniaxial compression. Elements of dentin matrix and microtubules passing through it are investigated by transmission electron microscopy and computed microtomography using synchrotron light. Some structural features arising from the interaction between the elements and the dentin tubule properties that lead to arrest of crack propagation are investigated. We develop a theoretical model that can be used to identify the conditions for mode II crack inhibition due to opening of satellite cracks by stresses present on the surface of dentin tubules.

中文翻译：

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第三届国际会议“生命科学物理”计算机显微照相和透射电镜研究牙本质结构特征

摘要

人牙中的牙本质是一种天然的复合材料，具有复杂的多层层次结构，由微观和纳米结构组成，它们之间的复杂相互关系由尚未完全了解的法律控制。为了确定牙本质结构与其力学性能之间的关系，我们研究了从人类磨牙经过单轴压缩后制备的样品。通过透射电子显微镜和使用同步加速器光的计算机断层摄影术研究牙本质基质和通过它的微管的元素。研究了由元素与牙本质小管之间的相互作用导致的裂纹扩展停止的一些结构特征。