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.
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The authors are grateful to D.V. Zaitsev for kindly providing dentin samples for investigation.
The experimental work of T.S. Argunova was supported by the Russian Foundation for Basic Research, project no. 19-29-12041_mk. M.Yu. Gutkin gratefully acknowledges support from the Russian Foundation for Basic Research (project no. 18-38-20097) for development of the theoretical model of dentin fracture.
The authors declare that they have no conflict of interest.
Translated by P. Pozdeev
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Argunova, T.S., Gudkina, Z.V. & Gutkin, M.Y. A Model of Microcrack Development in Human Tooth Dentin Using Data of Microtomography. Tech. Phys. Lett. 46, 505–509 (2020). https://doi.org/10.1134/S106378502005020X
- dentinal tubules
- X-ray microtomography.