Abstract

The structure of dentin is characterized by the presence of microchannels—dentinal tubules (DTs) threading through the matrix composed of collagen fibris and hydroxyapatite nanocrystals. The influence of DTs on the resistance of dentin to cracking has been studied on samples prepared from human molar teeth. The samples were subjected to uniaxial compression until the onset of cracking and then studied by the method of synchrotron radiation microtomography. The obtained results allowed a model of mode II microcrack development in dentin to be formulated.

中文翻译：

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使用显微断层扫描数据的人牙牙本质微裂纹发展模型

摘要

牙本质的结构特征是存在微通道-牙本质小管（DTs）穿过胶原纤维和羟基磷灰石纳米晶体组成的基质。已经研究了从人类磨牙制备的样品中，DTs对牙本质抗龟裂性的影响。对样品进行单轴压缩，直到出现裂纹为止，然后通过同步辐射显微照相法进行研究。获得的结果允许建立牙本质中模式II微裂纹发展的模型。