alexa Early changes in muscle strength after total knee arthroplasty. A 6-month follow-up of 30 knees.
Orthopaedics

Orthopaedics

Orthopedic & Muscular System: Current Research

Author(s): Lorentzen JS, Petersen MM, Brot C, Madsen OR

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Abstract We studied 30 patients with arthrosis in one knee operated on with a cemented (n 26) or an uncemented total knee arthroplasty (TKA) (n 4). Full weight-bearing from the first postoperative day was allowed in all patients, and they received standard postoperative physiotherapy. 1 week prior to surgery, and after 3 and 6 months, isokinetic and isometric muscle strength in both legs were measured, using a Cybex 6000 dynamometer. Isokinetic tests showed a bilateral, significant, and progressive increase (30-53\%) in flexor muscle strength most pronounced in the operated legs. Isokinetic extensor strength increased significantly (14-18\%) in the operated legs, while in the contralateral legs, a limited increase was found. Isometric flexion strength significantly decreased in the operated knees (17\%). Isometric extension strength showed a temporary decrease at 3 months, which returned to the preoperative level. No significant change in isometric strength was observed in the contralateral legs. The knee pain during the muscle strength measurements decreased significantly from the preoperative level, which may indicate that the substantial pain relief within 3 months after a TKA is an important factor for evaluation of muscle strength.
This article was published in Acta Orthop Scand and referenced in Orthopedic & Muscular System: Current Research

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