Abstract
One hundred-and-five knees (75 patients) with rheumatoid arthritis received Yamamoto Mark III total knee replacement in our hospital from 1987 to 1992. Bone graft was used on 58 knees which had severe bone defect or bone atrophy. Fifty of these 58 knees could be followed for more than one year. Eighteen had had a trapezoidal bone graft because of a large bone defect of the tibial plateau, 22 a bone chips graft because of bone atrophy or bone cyst of the tibia, 3 a trapezoidal bone graft on the femur, and 17 a bone chips graft on the femur side.
Clinical results as represented by JOA score were satisfactory. X-ray findings showed complete bone union in all cases. But sinking of the tibia component was observed in 28 knees, especially in 16 knees with bone chips graft of the tibia. Loosening of the femoral component was observed in 4 knees.
