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

Autor:	Khatkar, Harman, Hothi, Harry, Villiers, Danielle, Lausmann, Christian, Kendoff, Daniel, Gehrke, Thorsten, Skinner, John, Hart, Alister, de Villiers, Danielle
Předmět:	CERAMIC coating POLYETHYLENE INFECTION ORTHOPEDIC implants ACETABULUM (Anatomy) THERAPEUTIC use of biomedical materials ARTIFICIAL joints BIOMEDICAL materials PROSTHETICS COMPLICATIONS of prosthesis SCANNING electron microscopy TOTAL hip replacement DISEASE incidence FEMUR head THERAPEUTICS
Zdroj:	International Orthopaedics; Jun2017, Vol. 41 Issue 6, p1101-1105, 5p
Abstrakt:	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. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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