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Muscular function and bone mass after knee arthroplasty
J Anchuela1, L Gomez-Pellico, M Ferrer-Blanco
1Department of Orthopaedics, El Escorial Hospital, Guadarrama to San Lorenzo del Escorial Road, M-600 Km 6.225, Madrid, Spain. med011823@nacom.es
Abstract:
We report a study of 28 women with severe primary gonarthrosis followed for 1 year. Variations in bone mineral density and in functional behaviour of knee extensors and flexors were studied before and after implantation of uncemented total knee prosthesis. A functional deficit was noted in the extensor apparatus, which increased in the first 6 months following surgery. This strength was not improved 1 year following the arthroplasty, but it was more efficient as shown by the reduction of muscle fatigue. Flexor strength was conserved and a pathological muscle balance was maintained, reaching maximum efficiency over a smaller joint range.
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