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Cement mantle fatigue failure in total hip replacement: experimental and computational testing

Jeffers, Jonathan R.T., Browne, Martin, Lennon, Alexander B., Prendergast, Patrick J. and Taylor, Mark (2007) Cement mantle fatigue failure in total hip replacement: experimental and computational testing Journal of Biomechanics, 39, (7), pp. 1525-1533. (doi:10.1016/j.jbiomech.2006.07.029).

Record type: Article

Abstract

One possible loosening mechanism of the femoral component in total hip replacement is fatigue cracking of the cement mantle. A computational method capable of simulating this process may therefore be a useful tool in the preclinical evaluation of prospective implants. In this study, we investigated the ability of a computational method to predict fatigue cracking in experimental models of the implanted femur construct. Experimental specimens were fabricated such that cement mantle visualisation was possible throughout the test. Two different implant surface finishes were considered: grit blasted and polished. Loading was applied to represent level gait for two million cycles. Computational (finite element) models were generated to the same geometry as the experimental specimens, with residual stress and porosity simulated in the cement mantle. Cement fatigue and creep were modelled over a simulated two million cycles. For the polished stem surface finish, the predicted fracture locations in the finite element models closely matched those on the experimental specimens, and the recorded stem displacements were also comparable. For the grit blasted stem surface finish, no cement mantle fractures were predicted by the computational method, which was again in agreement with the experimental results. It was concluded that the computational method was capable of predicting cement mantle fracture and subsequent stem displacement for the structure considered.

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More information

Published date: October 2007
Keywords: bone cement, fatigue, finite element, continuum damage mechanics, hip replacement

Identifiers

Local EPrints ID: 47596
URI: http://eprints.soton.ac.uk/id/eprint/47596
ISSN: 0021-9290
PURE UUID: 628e4d1c-7bee-43c3-a217-e82d3486fc83
ORCID for Martin Browne: ORCID iD orcid.org/0000-0001-5184-050X

Catalogue record

Date deposited: 02 Aug 2007
Last modified: 17 Jul 2017 15:03

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Contributors

Author: Jonathan R.T. Jeffers
Author: Martin Browne ORCID iD
Author: Alexander B. Lennon
Author: Patrick J. Prendergast
Author: Mark Taylor

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