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Lookup NU author(s): Dr Martin Bone,
Professor Tom Joyce
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The two-piece Van Straten Leuwen Poeschmann Metal (LPM) prosthesis was intended for the proximal interphalangeal joints. However, revision rates of 29% after 19 months were reported, as well as massive osteolysis. Five failed LPM titanium–niobium coated cobalt chromium components were obtained, three distal and two proximal, and subjected to a forensic retrieval analysis. Components were analyzed using a Talysurf contacting profilometer, ZYGO noncontacting profilometer, and environmental-scanning electron microscope. All components were heavily worn. In some regions the titanium–niobium coating had been scratched and penetrated. Elsewhere this coating had been removed where there was minimal scratching, which may have been due to corrosion between the coating and substrate. The osteolysis reported clinically was likely to be linked to the wear debris from the failed titanium–niobium coating and substrate.
Author(s): Bone MC, Cunningham JL, Lord J, Giddins G, Field J, Joyce TJ
Publication type: Article
Publication status: Published
Journal: Journal of Hand Surgery (European Volume)
Print publication date: 18/09/2012
ISSN (print): 1753-1934
ISSN (electronic): 2043-6289
Publisher: Sage Publications Ltd.
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