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Do Rotating Platform LCS Knees Continue To Rotate In Vivo?

Author(s): Joby John

Journal: Journal of Orthopaedics
ISSN 0972-978X

Volume: 3;
Issue: 2;
Date: 2006;
Original page

Keywords: rotating platform | LCS knee

Background: Tricompartmental knee replacement has been shown to produce good function and have a good survivorship. The limiting factor in the function of knee replacements is polyethylene wear and subsequent loosening at the bone prosthesis interface. Mobile bearing prosthesis were developed to decouple the translational and rotational motions, thus decreasing the wear. This would be effective only if the bearings continue to remain mobile invivo. Methods: 10 LCS knees implanted in the period beginning 2000 with at least 1 year follow-up were examined fluoroscopically to determine if the rotating platform was indeed rotating in vivo. Results: All the knees examined were found to have polyethylene bearings which were still mobile. Conclusions: Rotating platforms in LCS knees continue to rotate at early follow-up. Further studies have to be conducted to examine whether these rotating platforms are still mobile at further longer follow-up.
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