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KMID : 0359620090210010029
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Journal of Korean Knee Society
2009 Volume.21 No. 1 p.29 ~ p.34
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Functional Evaluation of High-Flex Total Knee Arthroplasty
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Song Young-Joon
Ha Chul-Won
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Abstract
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Purpose:
Material and Methods : We retrospectively analyzed 266 knees that underwent HF-TKAs with using a Scorpio-flex and the follow up period for all the knees was over 1 year. Functional evaluation was performed by questionnaire on activities, including cross-leg sitting, squatting, kneeling, standing from the floor, standing from a chair and ascending and descending stairs. The clinical evaluation included the Knee Society Knee Score (KSKS) & Function Score (KSFS), the WOMAC score and the patient`s satisfaction score. The identification of suitable tools for the functional evaluation of high flexion activities was performed by statistical analysis.
Results: Deep flexion of the knees averaged 132.6˚. Cross-leg sitting was possible for 90.6%, squatting for 32.3%, kneeling for 28.0%, standing from the floor for 66.9%, standing from a chair for 99.6%, ascending stairs for 96.2% and descending stairs for 90.6%. The WOMAC score and KSKS well differentiated the groups for the possibility of their activities, but the KSFS and patient`s satisfaction did not differentiate between the groups for some activities.
Conclusion: The functional evaluation after total knee arthroplasty with HF-TKA revealed good results on cross-leg sitting, standing from chair, ascending & descending stairs, but still poor results on squatting and kneeling. For the functional evaluation of HF-TKA, we believe that the WOMAC and KSKS are good evaluation tools. The KSFS and the patient`s satisfaction need careful interpretation when using these for high flexion-related functional evaluation due to their lack of ability to differentiate between good and poor results by some activities.
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KEYWORD
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Knee, Total knee arthroplasty, High-Flex, Functional evaluation
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