Muscular function and bone mass after knee arthroplasty.
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.
Anchuela
J
J
Department of Orthopaedics, El Escorial Hospital, Guadarrama to San Lorenzo del Escorial Road, M-600 Km 6.225, Madrid, Spain. med011823@nacom.es
Gomez-Pellico
L
L
Ferrer-Blanco
M
M
Slocker
M
M
Rodriguez
R
R
D000368:Aged; D000704:Analysis of Variance; D015519:Bone Density / Q000502:physiology*; D016022:Case-Control Studies; D003720:Densitometry / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000502:physiology*; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011182:Postoperative Care; D011300:Preoperative Care; D011336:Probability; D016059:Range of Motion, Articular / Q000502:physiology*; D020127:Recovery of Function; D012494:Sampling Studies; D012720:Severity of Illness Index; D013997:Time Factors