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Comparison of the Low Contact Stress and Press Fit Condylar rotating-platform mobile-bearing prostheses in total knee arthroplasty a prospective randomized study

Title
Comparison of the Low Contact Stress and Press Fit Condylar rotating-platform mobile-bearing prostheses in total knee arthroplasty a prospective randomized study
Authors
Kim Y.-H.Kim J.-S.Park J.-W.Joo J.-H.
Ewha Authors
김영후김준식박장원
SCOPUS Author ID
김영후scopus; 김준식scopus; 박장원scopus
Issue Date
2011
Journal Title
Journal of Bone and Joint Surgery - Series A
ISSN
0021-9355JCR Link
Citation
vol. 93, no. 11, pp. 1001 - 1007
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Background: To our knowledge, no study to date has compared the clinical results of posterior cruciate-sacrificing mobile-bearing total knee replacements with those of posterior-stabilized mobile-bearing total knee replacements in the same patients. The purpose of the present study was to compare the clinical and radiographic results of these two designs. We hypothesized that the results would be better for knees treated with the posterior-stabilized mobile-bearing prosthesis. Methods: The present study consisted of a consecutive series of 107 female patients (mean age, 66.8 years) who underwent bilateral simultaneous total knee arthroplasty at the same surgical setting. All of these patients received a posterior cruciate-sacrificing mobile-bearing prosthesis in one knee and a posterior-stabilized mobile-bearing prosthesis in the contralateral knee. At the time of each follow-up (mean, 7.4 years; range, seven to 7.6 years), the patients were assessed clinically. Results: The mean postoperative Knee Society knee score (96 compared with 97 points) and Hospital for Special Surgery knee score (93 compared with 94 points) were similar between the two groups. At the time of the latest follow-up, the average range of motion was 127.7° (range, 70° to 150°) in the knees with a posterior cruciate-sacrificing mobilebearing prosthesis and 132.4° (range, 90° to 150°) in the knees with a posterior-stabilized mobile-bearing prosthesis. With a margin of error of the manual measurement of 5°, this difference was not significant. The estimated survival rate was 97.2% (95% confidence interval, 91% to 99%) at seven years in the posterior-cruciate sacrificing mobile-bearing prosthesis group and 98.1% (95% confidence interval, 92% to 99%) at seven years in the posterior-stabilized mobilebearing prosthesis group. Conclusions: After a minimum duration of follow-up of seven years, we found no significant differences between the two groups with regard to the clinical and radiographic results, including knee range of motion. Level of Evidence: Therapeutic Level I. See Instructions to Authors for a complete description of levels of evidence. Copyright © 2011 by The Journal of Bone and Joint Surgery, Incorporated.
DOI
10.2106/JBJS.J.00445
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의학전문대학원 > 의학과 > Journal papers
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