Pseudotumour formation due to tribocorrosion at the taper interface of large diameter metal on polymer modular total hip replacements
Pseudotumour formation due to tribocorrosion at the taper interface of large diameter metal on polymer modular total hip replacements
We present an in-depth failure analysis of two large diameter bearing metal-on-polymer (MoP) modular total hip replacements, which have required revision surgery due to pseudotumour formation. The failure analysis showed a discrete pattern of material loss from the distal end of the head taper/stem trunnion interface. We postulate that the use of a proximal contacting taper design had provided insufficient mechanical locking between the head and the stem, enabling the head to toggle on the trunnion. In addition, the difference in angle between the taper and the trunnion formed a crevice between the two components. Through a combination of crevice environment, mechanically assisted corrosion, mechanical wear and erosion; debris and metal-ions have been released resulting in the adverse local tissue reactions (ALTR)
hip, pseudotumour, corrosion, fretting, taper
1430-1436
Cook, Richard B.
06f8322d-81be-4f82-9326-19e55541c78f
Bolland, Benjamin J.R.F.
0f256518-5316-4376-bb6a-e5eff75fda71
Wharton, Julian A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Tilley, Simon
fc6eeb2f-ffb5-4cc9-9565-c7c40175c284
Latham, Jeremy L.
6e85781c-d3c6-49a9-9e5e-a799760bc914
Wood, Robert J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
September 2013
Cook, Richard B.
06f8322d-81be-4f82-9326-19e55541c78f
Bolland, Benjamin J.R.F.
0f256518-5316-4376-bb6a-e5eff75fda71
Wharton, Julian A.
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Tilley, Simon
fc6eeb2f-ffb5-4cc9-9565-c7c40175c284
Latham, Jeremy L.
6e85781c-d3c6-49a9-9e5e-a799760bc914
Wood, Robert J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Cook, Richard B., Bolland, Benjamin J.R.F., Wharton, Julian A., Tilley, Simon, Latham, Jeremy L. and Wood, Robert J.K.
(2013)
Pseudotumour formation due to tribocorrosion at the taper interface of large diameter metal on polymer modular total hip replacements.
The Journal of Arthroplasty, 28 (8), .
(doi:10.1016/j.arth.2013.02.009).
(PMID:23528556)
Abstract
We present an in-depth failure analysis of two large diameter bearing metal-on-polymer (MoP) modular total hip replacements, which have required revision surgery due to pseudotumour formation. The failure analysis showed a discrete pattern of material loss from the distal end of the head taper/stem trunnion interface. We postulate that the use of a proximal contacting taper design had provided insufficient mechanical locking between the head and the stem, enabling the head to toggle on the trunnion. In addition, the difference in angle between the taper and the trunnion formed a crevice between the two components. Through a combination of crevice environment, mechanically assisted corrosion, mechanical wear and erosion; debris and metal-ions have been released resulting in the adverse local tissue reactions (ALTR)
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e-pub ahead of print date: 25 March 2013
Published date: September 2013
Keywords:
hip, pseudotumour, corrosion, fretting, taper
Organisations:
nCATS Group
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Local EPrints ID: 351923
URI: http://eprints.soton.ac.uk/id/eprint/351923
ISSN: 0883-5403
PURE UUID: 5bc2a025-a7b0-4619-af6c-a944ed8edccb
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Date deposited: 29 Apr 2013 10:06
Last modified: 15 Mar 2024 03:34
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Contributors
Author:
Benjamin J.R.F. Bolland
Author:
Simon Tilley
Author:
Jeremy L. Latham
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