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The Journal of arthroplasty v.33 no.1, 2018년, pp.130 - 135   SCIE
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Comparison of High-Flexion Fixed-Bearing and High-Flexion Mobile-Bearing Total Knee Arthroplasties—A Prospective Randomized Study

Kim, Young-Hoo    (The Joint Replacement Centers, Ewha Womans University, SeoNam Hospital, Seoul, Republic of Korea   ); Park, Jang-Won    (The Joint Replacement Centers, Ewha Womans University, MokDong Hospital, Seoul, Republic of Korea   ); Kim, Jun-Shik    (The Joint Replacement Centers, Ewha Womans University, MokDong Hospital, Seoul, Republic of Korea  );
  • 초록  

    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/m 2 (range 23-34 kg/m 2 ). 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.


  • 주제어

    high-flexion fixed-bearing total knee .   high-flexion mobile-bearing total knee .   young patients .   prospective .   randomized study .   clinical and radiographic results.  

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