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An attempt was undertaken to single out the factors which would influence the recovery process of"extension lag"of the knee joint that were totally replaced with artificial prostheses.<BR>In total, forty-eight knee joint of 37 RA patients (32 women, 5 men: age ranging from 31 through 73 years old) which were totally replaced with the Kodama-Yamamoto knee prostheses (Okayama Univ. Mark II type) were evaluated.<BR>Preoperative objective measurements, such as degrees of the flexion contracture of the knee joint, manual muscle testing of the quadriceps muscles, time to walk 10 meters, were analyzed against the postoperative number of the day at which the degree of the extension lag of the operated knee joint on its way of recovery attained 20, and 10 degrees.<BR>Results of preoperative MMT of the quadriceps muscles and severity of the flexion contracture of the knee joint to be operated on were also utilized to perform a'grouping'study.<BR>Our study clearly demonstrated that residual muscle strength of the quadriceps muscles played a more decisive role in the recovery of the"extension lag"of the artificially replaced knee joint than the severity of the flexion contracture of the joint per se.
日本関節病学会の論文