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Publication Detail
In vivo roughening of retrieved total knee arthroplasty femoral components.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Journal Article
  • Authors:
    Malikian R, Maruthainar K, Stammers J, Cannon SR, Carrington R, Skinner JA, Maruthainar N, Dowd G, Briggs TWR, Blunn GW
  • Publication date:
  • Pagination:
    278, 282
  • Journal:
  • Volume:
  • Issue:
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  • Keywords:
    Arthroplasty, CoCr, Retrieval, Roughness, Aged, Aged, 80 and over, Arthroplasty, Replacement, Knee, Case-Control Studies, Chromium, Cobalt, Device Removal, Female, Humans, Knee Prosthesis, Male, Microscopy, Electron, Scanning, Middle Aged, Polyethylene, Prosthesis Failure, Reoperation, Surface Properties
BACKGROUND: Joint registry data highlights the higher rates of cumulative revision for younger patients undergoing TKR. One of the reasons associated with this higher revision rate may be due to the wear of the UHMWPE leading to loosening. Alternate bearing surfaces have been developed to address this problem; however, roughening of the metal bearing surface has not been demonstrated in vivo. METHOD: We recorded roughness measurements of retrieved femoral components. RESULTS: Average lateral condyle roughness was 0.032 μm, compared to control values of 0.020 μm, p=0.002; average medial condyle roughness was 0.028 μm, compared to a control value of 0.019, p<0.001. CONCLUSION: There was a small but statistically significant roughening of femoral components in vivo compared to controls. This may have important implications for aseptic loosening of knee arthroplasty components and the decision to use scratch resistant components.
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