NDLI: Transmission electron microscopical study of teenage crown dentin on the nanometer scale.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Panfilov, Peter Kabanova, Anna Guo, Jinming Zhang, Zaoli
Description	Author Affiliation: Panfilov P ( Ural Federal University, Ekaterinburg, Russia. Electronic address: peter.panfilov@urfu.ru.); Kabanova A ( Ural Federal University, Ekaterinburg, Russia.); Guo J ( Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben, Austria.); Zhang Z ( Erich Schmid Institute for Materials Science, Austrian Academy of Sciences, Leoben, Austria.)
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 ~50nm. HA inorganic phase of teenage crown dentin is in the amorphous state. The cellular structure, which was formed from collagen fibers (diameter is ~5nm), 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 (~30 ) with plastic zone ahead crack tip. It means that young crown human dentin exhibits ductile or viscous-elastic fracture behavior on the nanometer scale.
File Format	HTM / HTML
ISSN	09284931
Journal	Materials Science and Engineering: C
Volume Number	71
e-ISSN	18730191
Language	English
Publisher	Elsevier
Publisher Date	2017-02-01
Publisher Place	Netherlands
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Biomaterials Condensed Matter Physics Bioengineering Mechanical Engineering

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