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Comput Methods Biomech Biomed Engin. 2014;17(3):230-8. doi: 10.1080/10255842.2012.675057. Epub 2012 Apr 19.

Micro-mechanical damage of trabecular bone-cement interface under selected loading conditions: a finite element study.

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1
a Mechanical Behaviour of Materials Laboratory, School of Engineering, University of Portsmouth , Anglesea Road, Portsmouth , PO1 3DJ , UK.

Abstract

In this study, two micro finite element models of trabecular bone-cement interface developed from high resolution computed tomography (CT) images were loaded under compression and validated using the in situ experimental data. The models were then used under tension and shear to examine the load transfer between the bone and cement and the micro damage development at the bone-cement interface. In addition, one models was further modified to investigate the effect of cement penetration on the bone-cement interfacial behaviour. The simulated results show that the load transfer at the bone-cement interface occurred mainly in the bone cement partially interdigitated region, while the fully interdigitated region seemed to contribute little to the mechanical response. Consequently, cement penetration beyond a certain value would seem to be ineffective in improving the mechanical strength of trabecular bone-cement interface. Under tension and shear loading conditions, more cement failures were found in denser bones, while the cement damage is generally low under compression.

PMID:
22515517
DOI:
10.1080/10255842.2012.675057
[Indexed for MEDLINE]

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