We evaluated clinically the results of 7 patients (14 joints) operated on for bilateral ostedo-arthritic knee joints. All patients underwent total knee replacement (TKR) on one side and high tibial osteotomy (HTO) on the other. The results were as follows; there was no difference between the two in terms of the degree of pain and the capacity of going up and down stair based on the criteria of osteo-arthritic knee joint. Bilateral knee joints respectively decreased the range of motion after these operations, in particular, the TKR decreased excessively, (mean, 28 degress). On the overall score, mean post-operative one was increased in comparison with the pre-operative one, namely 50 to 80 for the TKR side and 52 to 88.6 for the other side. These data suggest that dissatisfaction of the patients on the post-operative function of the knee is not at the joint with HTO but at the other.
