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Does Implant Selection Affect Outcome of Revision Knee Arthoplasty?
William D. Bugbee, MD, Gerard A. Engh, MD, Deborah J. Ammeen, BS
The Journal of Arthroplasty, August 2001
Abstract
We reviewed 139 consecutive femoral and/or tibial revision knee arthroplasties to determine if the outcome of revision knee arthroplasty using revision implant systems was superior to revisions using primary implant systems. The implant status was known in 123 of 139 knees at a mean follow-up interval of seven years (range, 5-12 years). Three groups of components were compared:
- Group 1 (n = 42) consisted of revisions performed with implants designed for primary TKAs.
- Group 2 (n = 42) consisted of revisions performed with modified primary components.
- Group 3 (n = 55) consisted of revisions done with components designed for revision arthroplasty.
The implant-related failure rate, defined as re-operation requiring component revision or removal, was 26% for Group 1; 14% for Group 2; and 6% for Group 3 (p<0.05).
Conclusion: Revision implants exhibited superior performance and durability despite their use in more difficult reconstructions. The improved longevity of revision implants justifies the evolution of modular revision components.
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