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Knee kinematics in functional activities seven years after total knee arthroplasty

Van der Linden, M.L. and Rowe, P.J. and Myles, C.M. and Burnett, R. and Nutton, R.W. (2007) Knee kinematics in functional activities seven years after total knee arthroplasty. Clinical Biomechanics, 22 (5). pp. 537-542. ISSN 0268-0033

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Abstract

Detailed knowledge of knee kinematics during functional activities is lacking in current studies on the long-term outcome of total knee replacement surgery. The aim of this study was to assess functional knee kinematics using flexible electrogoniometry in patients seven years after unilateral primary total knee arthroplasty for osteoarthritis. The function components of the Knee Society and WOMAC scores were significantly decreased at seven years compared to 18-24 months after surgery (both P < 0.05). However, the majority of the functional knee flexion values derived from electrogoniometry did not decrease. Seven years after surgery, knee excursion during ascending and descending stairs was significantly improved compared to 18-24 months after surgery (both P < 0.01). The finding that functional knee motion continues to improve between 18-24 months and seven years post-surgery is of interest to both patients and those responsible for their treatment planning. Further, it was shown that the WOMAC and Knee Society Scores do not follow the same trends as the patients' functional knee kinematics seven years after total knee replacement surgery.