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High-flexion total knee arthroplasty: Survivorship and prevalence of osteolysis - Results after a minimum of ten years of follow-up

Title
High-flexion total knee arthroplasty: Survivorship and prevalence of osteolysis - Results after a minimum of ten years of follow-up
Authors
Kim Y.-H.Park J.-W.Kim J.-S.
Ewha Authors
김영후김준식박장원
SCOPUS Author ID
김영후scopus; 김준식scopus; 박장원scopus
Issue Date
2012
Journal Title
Journal of Bone and Joint Surgery - Series A
ISSN
0021-9355JCR Link
Citation
vol. 94, no. 15, pp. 1378 - 1384
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Background: We are aware of no information about the mid-term performance of the high-flexion total knee arthroplasty, although early results have been reported. The purpose of this study was to evaluate the mid-term results of high-flexion and conventional knee prostheses. Methods: We prospectively compared the results of 100 patients with osteoarthritis who had received a NexGen Legacy Posterior Stabilized (NexGen LPS) prosthesis in one knee and a NexGen Legacy Posterior Stabilized-Flex (NexGen LPS-Flex) prosthesis in the other. Seventy-five patients (150 knees) were women and twenty-five (fifty knees) were men. The mean age was sixty-five years (range, forty-eight to eighty-five years) at the time of the index procedure. The mean duration of follow-up was 10.3 years (range, ten to 10.6 years). The patients were assessed with radiographs, with the rating system of the Knee Society, and with the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score at three months, one year, and annually thereafter. Results: Total knee scores, knee function scores, pain scores, WOMAC scores, knee motion, and activity scores did not differ significantly between the two designs of the implants, on the basis of the numbers studied, either preoperatively or at the time of final follow-up. One knee in the NexGen LPS-Flex group was revised because of recurrent infection. No knee in either group had aseptic loosening of the components. The Kaplan-Meier survivorship at ten years postoperatively, with revision defined as the end point, was 100% (95% confidence interval, 94 to 100) for the NexGen LPS prosthesis and 99% (95% confidence interval, 93 to 100) for the NexGen LPS-Flex prosthesis. Conclusions: After a minimum duration of follow-up of ten years, there were no significant differences between the two groups with regard to implant survivorship, functional outcome, knee motion, or prevalence of osteolysis. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence. Copyright © 2012 by The Journal of Bone and Joint Surgery, Incorporated.
DOI
10.2106/JBJS.K.01229
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의과대학 > 의학과 > Journal papers
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