Comparison of 5-year cup and stem migration between ceramic-on-ceramic and ceramic-on-polyethylene bearing in press-fit total hip arthroplasty: a randomised controlled trial using radiostereometric analysis.

11 – 13 Previously published 2-year results of this study showed a trend of more cup migration on some parameters in the CoC group compared to the CoPE group; however, differences were small and not statistically significant. 14 Results with a longer follow-up on stability of press-fit cups and stems between CoC and CoPE by means of RSA will contribute to our knowledge of the most optimal bearing choice in THA.

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Slightly higher mean stem migration on all parameters was observed in PE compared to CE, but it did not reach statistical significance.

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