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Comparison of High-Flexion Fixed-Bearing and High-Flexion Mobile-Bearing Total Knee Arthroplasties—A Prospective Randomized Study

Title
Comparison of High-Flexion Fixed-Bearing and High-Flexion Mobile-Bearing Total Knee Arthroplasties—A Prospective Randomized Study
Authors
Kim Y.-H.Park J.-W.Kim J.-S.
Ewha Authors
김영후김준식박장원
SCOPUS Author ID
김영후scopus; 김준식scopusscopus; 박장원scopus
Issue Date
2018
Journal Title
Journal of Arthroplasty
ISSN
0883-5403JCR Link
Citation
Journal of Arthroplasty vol. 33, no. 1, pp. 130 - 135
Keywords
clinical and radiographic resultshigh-flexion fixed-bearing total kneehigh-flexion mobile-bearing total kneeprospectiverandomized studyyoung patients
Publisher
Churchill Livingstone Inc.
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Background There is none, to our knowledge, about comparison of high-flexion fixed-bearing and high-flexion mobile-bearing total knee arthroplasties (TKAs) in the same patients. The purpose of this study was to determine whether clinical results; radiographic and computed tomographic scan results; and the survival rate of a high-flexion mobile-bearing TKA is better than that of a high-flexion fixed-bearing TKA. Methods The present study consisted of 92 patients (184 knees) who underwent same-day bilateral TKA. Of those, 17 were men and 75 were women. The mean age at the time of index arthroplasty was 61.5 ± 8.3 years (range 52-65 years). The mean body mass index was 26.2 ± 3.3 kg/m2 (range 23-34 kg/m2). The mean follow-up was 11.2 years (range 10-12 years). Results The Knee Society knee scores (93 vs 92 points; P =.531) and function scores (80 vs 80 points; P = 1.000), WOMAC scores (14 vs 15 points; P =.972), and UCLA activity scores (6 vs 6 points; P = 1.000) were not different between the 2 groups at 12 years follow-up. There were no differences in any radiographic and CT scan parameters between the 2 groups. Kaplan-Meier survivorship of the TKA component was 98% (95% confidence interval, 93-100) in the high-flexion fixed-bearing TKA group and 99% (95% confidence interval, 94-100) in the high-flexion mobile-bearing TKA group 12 years after the operation. Conclusion We found no benefit to mobile-bearing TKA in terms of pain, function, radiographic and CT scan results, and survivorship. Longer-term follow-up is necessary to prove the benefit of the high-flexion mobile-bearing TKA over the high-flexion fixed-bearing TKA. © 2017 Elsevier Inc.
DOI
10.1016/j.arth.2017.07.025
Appears in Collections:
의과대학 > 의학과 > Journal papers
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