Ptychographic X-ray nanotomography quantifies mineral distributions in human dentine

Bones are bio-composites with biologically tunable mechanical properties, where a polymer matrix of nanofibrillar collagen is reinforced by apatite mineral crystals. Some bones, such as antler, form and change rapidly, while other bone tissues, such as human tooth dentine, develop slowly and maintai...

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Published in:Scientific reports 2015-03, Vol.5 (1), p.9210, Article 9210
Main Authors: Zanette, I, Enders, B, Dierolf, M, Thibault, P, Gradl, R, Diaz, A, Guizar-Sicairos, M, Menzel, A, Pfeiffer, F, Zaslansky, P
Format: Article
Language:English
Subjects:
Apatite
Bone healing
Bones
Collagen
Crystals
Dentin - chemistry
Humans
Mechanical properties
Microscopy, Electron
Mineralization
Minerals - analysis
Teeth
Tubules
Ultrastructure
X-Ray Microtomography - methods
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cited_by cdi_FETCH-LOGICAL-c403t-aadefecbcbfc813d22712558932b904400a5d316ae24e1b25a166cd80a3589b83
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container_start_page 9210
container_title Scientific reports
container_volume 5
creator Zanette, I
Enders, B
Dierolf, M
Thibault, P
Gradl, R
Diaz, A
Guizar-Sicairos, M
Menzel, A
Pfeiffer, F
Zaslansky, P
description Bones are bio-composites with biologically tunable mechanical properties, where a polymer matrix of nanofibrillar collagen is reinforced by apatite mineral crystals. Some bones, such as antler, form and change rapidly, while other bone tissues, such as human tooth dentine, develop slowly and maintain constant composition and architecture for entire lifetimes. When studying apatite mineral microarchitecture, mineral distributions or mineralization activity of bone-forming cells, representative samples of tissue are best studied at submicrometre resolution while minimizing sample-preparation damage. Here, we demonstrate the power of ptychographic X-ray tomography to map variations in the mineral content distribution in three dimensions and at the nanometre scale. Using this non-destructive method, we observe nanostructures surrounding hollow tracts that exist in human dentine forming dentinal tubules. We reveal unprecedented quantitative details of the ultrastructure clearly revealing the spatially varying mineralization density. Such information is essential for understanding a variety of natural and therapeutic effects for example in bone tissue healing and ageing.
doi_str_mv 10.1038/srep09210
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subjects Apatite
Bone healing
Bones
Collagen
Crystals
Dentin - chemistry
Humans
Mechanical properties
Microscopy, Electron
Mineralization
Minerals - analysis
Teeth
Tubules
Ultrastructure
X-Ray Microtomography - methods
title Ptychographic X-ray nanotomography quantifies mineral distributions in human dentine
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