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Helicoidal-Rounded-Hole Microstructure of Mature Shankbone

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Abstract:

Scanning electron microscope (SEM) observation on a mature shankbone shows that the bone is a kind of bioceramic composite consisting of hydroxyapatite sheets and collagen protein matrix. The observation also shows that there are many holes in the bone and that the hydroxyapatite sheets near by these holes helicoidally round these holes forming a kind of helicoidally-rounded-hole microstructure (HRHM). The maximum pullout force of the HRHM is investigated and compared with that of non-helicoidally-rounded-hole microstructure (NHRHM). It shows that the HRHM could markedly increase the maximum pullout force of the hydroxyapatite sheets compared to the NHRHM and therefore enhance the fracture toughness of the bone.

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Periodical:

Key Engineering Materials (Volumes 460-461)

Pages:

652-655

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.460-461.652

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Online since:

January 2011

Authors:

Bin Chen, Ji Luo, Quan Yuan

Keywords:

Fracture Toughness, Helicoidally-Rounded Hole Microstructure, Hydroxyapatite Sheet, Maximum Pullout Force, Shankbone

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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