AI Article Synopsis
- Higher rates of revision in younger patients undergoing total knee replacement (TKR) may be linked to UHMWPE wear, leading to loosening.
- The study measured the roughness of retrieved femoral components and found average roughness values were significantly higher than controls, indicating wear.
- The findings suggest that the roughening of femoral components could impact the risk of aseptic loosening in knee implants and may influence the choice of materials used in surgery.
Article Abstract
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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| http://dx.doi.org/10.1016/j.knee.2012.09.008 | DOI Listing |
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