抄録
This study investigated 41 patients (56 joints) with rheumatoid arthritis which had undergone total knee replacement using a kinematic total knee system at least three years prior to the study. Subjects were followed for a mean period of 66 months (range, 40-96 months) . Average range of motion, tibia! radiolucent lines, complications, and rate of deviation from the center of the knee joint were evaluated immediately after the operation and during the follow-up period. Results showed that limitation of extension improved, but average range of motion decreased significantly from 104° to 95° . Tibial radiolucent lines one or more milimeters in length were observed in 29% of the knees at follow-up. Post-operative deep wound infections occurred in three joints (5%) ; one prosthesis had to be re moved. The ideal deviation rate should be set at within 1-20% of the valgus position from the normal Mikulicz line.
