Mechanical responses of hydrated and dehydrated cortical bones to microindentation

Yin, Ling, Venkatesan, Sudharshan, Webb, Daryl, Kalyanasundaram, Shankar, Qin, Qing-Hua, and Forwood, Mark R. (2010) Mechanical responses of hydrated and dehydrated cortical bones to microindentation. In: Proceedings of the 6th Australasian Congress on Applied Mechanics. pp. 1-5. From: ACAM 6 - 6th Australasian Congress on Applied Mechanics, 12- 15 December 2010, Perth, WA, Australia.

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We report on responses of hydrated and dehydrated cortical bone tissues to mechanical loading applied by a Vickers indenter to understand the influence of water on mechanical properties of bone. The Vickers indentations were section-scanned using confocal laser scanning microscopy to understand the deformation and damage mechanisms of bone tissues. The observation of confocal laser scanning microscopy shows the fundamental indentation responses for both the hydrated and dehydrated bone tissues were plastic deformation. No visible fracture was observed in the Vickers indentation patterns in the hydrated bone tissue, while microcracks occurred in the dehydrated bone tissue. This indicates that the dehydration resulted in increased brittleness of the bone tissue. The Vickers hardness values of dehydrated bone tissue were significantly higher than those of hydrated bone tissue at any applied loads (p<0.05).

Item ID: 16096
Item Type: Conference Item (Research - E1)
ISBN: 978-0-85825-941-6
Keywords: cortical bone, microcracks, deformation, microindentation, microhardness
Date Deposited: 04 May 2011 06:29
FoR Codes: 09 ENGINEERING > 0913 Mechanical Engineering > 091308 Solid Mechanics @ 100%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920118 Surgical Methods and Procedures @ 100%
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