Transmission electron microscopical study of teenage crown dentin on the nanometer scale / Panfilov Peter,Kabanova Anna,Guo Jinming,Zhang Zaoli // MATERIALS SCIENCE \& ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS. - 2017. - V. 71, l. . - P. 994-998.

ISSN/EISSN:

0928-4931 / 1873-0191

Type:

Article

Abstract:

This is the first transmission electron microscopic study of teenage crown dentin on the nanometer scale. Samples for TEM were prepared by mechanical thinning and chemical polishing that allowed obtaining the electron transparent foils. It was firstly shown that human dentin possesses the layered morphology: the layers are oriented normally to the main axis of a tooth and have the thickness of similar to 50 nm. HA inorganic phase of teenage crown dentin is in the amorphous state. The cellular structure, which was formed from collagen fibers (diameter is similar to 5 nm), are observed near DEJ region in teenage dentin, whereas bioorganic phase of teenage crown dentin near the pulp camera does not contain the collagen fibers. Cracks in dentin thin foils have sharp tips, but big angles of opening (similar to 30 degrees with plastic zone ahead crack tip. It means that young crown human dentin exhibits ductile or viscous-elastic fracture behavior on the nanometer scale. (C) 2016 Elsevier B.V. All rights reserved.

Author keywords:

Dentin; TEM; Structure; Hydroxyapatite; Collagen fibers DEFORMATION; FRACTURE

DOI:

10.1016/j.msec.2016.11.016

Web of Science ID:

ISI:000390967200115

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	FEB 1
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-0191
Keywords-Plus	DEFORMATION; FRACTURE
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Biomaterials
Author-Email	peter.panfilov@urfu.ru
ResearcherID-Numbers	Zhang, zaoli/I-3299-2013
ORCID-Numbers	Zhang, zaoli/0000-0002-7717-2500 Panfilov, Peter/0000-0001-9068-049X
Funding-Acknowledgement	Russian Science Foundation {[}15-19-10007]; Russian Foundation for Basic Research {[}15-08-04073a]
Funding-Text	This research is partially supported by the Russian Science Foundation, \#15-19-10007 (PP) and the Russian Foundation for Basic Research, \# 15-08-04073a (AK).
Number-of-Cited-References	15
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	9
Journal-ISO	Mater. Sci. Eng. C-Mater. Biol. Appl.
Doc-Delivery-Number	EG3TI