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KMID : 0361620090440060581
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Journal of the Korean Orthopaedic Association
2009 Volume.44 No. 6 p.581 ~ p.585
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Comparative Study of the Postoperative Maximal Flexion Angle in PCL-substituting TKAs - Conventional PS vs. High-flex PS -
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Choi Choong-Hyeok
Park Yong-Wook
Koo Min-Hoi
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Abstract
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Purpose: This study was performed to compare the postoperative maximal flexion angle (MFA) of standard PCL-substituting (PS) prosthesis with that of high-flexion PS prosthesis after total knee arthroplasty (TKA).
Materials and Methods: A total of 81 patients (133 knees) were enrolled in this study. Sixty-eight primary bilateral TKAs were performed in 34 consecutive patients. The bilateral TKAs were performed in a staged sequential manner, with a standard PS prosthesis in one knee and a high-flexion PS prosthesis in the contralateral knee. We also analyzed the results of another 47 patients as several control groups, and this consisted of standard or high-flexion PS total knee prostheses in the bilateral TKAs, and standard or high-flexion PS total knee prostheses in the unilateral TKAs. The patients were clinically assessed with the Knee Society scoring system and the MFA was measured with a goniometer.
Results: At the last follow up, the mean postoperative MFA of the 34 patients operated with the combination of different prostheses was 131.6±10.4˚ for high-flexion prosthesis side and 131.6±9.5˚ for standard prosthesis side respectively. There was no statistically significant difference. On comparing with the results of the 47 patients in the control group, no statistically significant difference in the mean postoperative MFA was found between the groups.
Conslusion: We found no significant differences between the high-flexion PS prosthesis and the standard PS prosthesis in the postoperative MFA.
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KEYWORD
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Knee, Total knee arthroplasty, High-flexion implant, Maximal flexion angle
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