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Retrieval analysis of ceramic-coated metal-on-polyethylene total hip replacements

Khatkar, H; Hothi, H; de Villiers, D; Lausmann, C; Kendoff, D; Gehrke, T; Skinner, J; (2017) Retrieval analysis of ceramic-coated metal-on-polyethylene total hip replacements. International Orthopaedics , 41 (6) pp. 1101-1105. 10.1007/s00264-016-3314-0. Green open access

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Abstract

PURPOSE: Ceramic coatings have been used in metal-on-polyethylene (MOP) hips to reduce the risk of wear and also infection; the clinical efficacy of this remains unclear. This retrieval study sought to better understand the performance of coated bearing surfaces. METHODS: Forty-three coated MOP components were analysed post-retrieval for evidence of coating loss and gross polyethylene wear. Coating loss was graded using a visual semi-quantitative protocol. Evidence of gross polyethylene wear was determined by radiographic analysis and visual inspection of the retrieved implants. RESULTS: All components with gross polyethylene wear (n = 10) were revised due to a malfunctioning acetabular component; 35 % (n = 15) of implants exhibited visible coating loss and the incidence of polyethylene wear in samples with coating loss was 54 %, significantly (p = 0.02) elevated compared to samples with intact coatings (14 %). CONCLUSIONS: In this study we found evidence of coating loss on metal femoral heads which was associated with increased wear of the corresponding polyethylene acetabular cups.

Type: Article
Title: Retrieval analysis of ceramic-coated metal-on-polyethylene total hip replacements
Location: Germany
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/s00264-016-3314-0
Publisher version: http://dx.doi.org/10.1007/s00264-016-3314-0
Language: English
Additional information: The final publication is available at Springer via http://dx.doi.org/10.1007/s00264-016-3314-0.
Keywords: Coating, Hip, Metal-on-polyethylene, Retrieval, Wear
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: https://discovery.ucl.ac.uk/id/eprint/1522792
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