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The role of microconstituents on the fatigue failure of bone cement

The role of microconstituents on the fatigue failure of bone cement
The role of microconstituents on the fatigue failure of bone cement
Implant fixation via the use of acrylic bone cement is now a well-established practice in orthopaedics. Excellent long-term clinical results are evidenced in national joint registers based on over 5 decades of clinical experience. Increased life expectancies, patient BMI, together with the need to remain active in later life, are expected to put greater demands on the materials used in load bearing joint arthroplasty. Failure of bone cement and its interfaces with the implant and bone often leads to loosening, requiring revision surgery. This is a particularly invasive procedure, with lower long-term success rates compared to the primary procedure. To reduce the incidence of bone cement failure, it is necessary to understand the origins of failure in vivo. In the past, bulk failure of bone cement has been attributed to damage accumulation originating at pores. Advances in imaging technology now mean that we are able to observe cement microconstituents readily and identify crack-initiating defects more precisely as we attempt to understand origins of failure. The role of radiopacifier particles within the bone cement has not been examined extensively to date, and the present study demonstrates that this microconstituent could be involved in crack formation due in part to its ability to agglomerate and not bond with the surrounding matrix. To verify this hypothesis, explanted bone cement and laboratory tested bone cement are compared and correlations in failure mechanisms are discussed.
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Shearwood-Porter, Natalie
ed7357b4-ad0e-4df4-bb6a-da7bb6ea420b
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Shearwood-Porter, Natalie
ed7357b4-ad0e-4df4-bb6a-da7bb6ea420b
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d

Browne, Martin, Shearwood-Porter, Natalie and Sinclair, Ian (2017) The role of microconstituents on the fatigue failure of bone cement. 7th International Conference on Fatigue Design, Senlis, France. 29 - 30 Nov 2017.

Record type: Conference or Workshop Item (Paper)

Abstract

Implant fixation via the use of acrylic bone cement is now a well-established practice in orthopaedics. Excellent long-term clinical results are evidenced in national joint registers based on over 5 decades of clinical experience. Increased life expectancies, patient BMI, together with the need to remain active in later life, are expected to put greater demands on the materials used in load bearing joint arthroplasty. Failure of bone cement and its interfaces with the implant and bone often leads to loosening, requiring revision surgery. This is a particularly invasive procedure, with lower long-term success rates compared to the primary procedure. To reduce the incidence of bone cement failure, it is necessary to understand the origins of failure in vivo. In the past, bulk failure of bone cement has been attributed to damage accumulation originating at pores. Advances in imaging technology now mean that we are able to observe cement microconstituents readily and identify crack-initiating defects more precisely as we attempt to understand origins of failure. The role of radiopacifier particles within the bone cement has not been examined extensively to date, and the present study demonstrates that this microconstituent could be involved in crack formation due in part to its ability to agglomerate and not bond with the surrounding matrix. To verify this hypothesis, explanted bone cement and laboratory tested bone cement are compared and correlations in failure mechanisms are discussed.

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Published date: 29 November 2017
Venue - Dates: 7th International Conference on Fatigue Design, Senlis, France, 2017-11-29 - 2017-11-30

Identifiers

Local EPrints ID: 417801
URI: https://eprints.soton.ac.uk/id/eprint/417801
PURE UUID: 851cc63c-efae-4ac6-99e8-e1b46789b80a
ORCID for Martin Browne: ORCID iD orcid.org/0000-0001-5184-050X

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Date deposited: 14 Feb 2018 17:30
Last modified: 14 Mar 2019 01:51

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Contributors

Author: Martin Browne ORCID iD
Author: Natalie Shearwood-Porter
Author: Ian Sinclair

University divisions

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