Abstract
35 patients with medial osteoarthritis of the knee underwent at random either a dome osteotomy (Dome) or hemicallotasis open-wedge osteotomy (Hemi). At one year after the operation, we compared the radiographic changes in the patellar tendon length, tibial plateau angle, and lateral shift of the proximal tibial plateau with respect to the tibial axis between the Dome group consisting of 20 knees of 18 patients and the Hemi group consisting of 19 knees of 17 patients. No significant differences were seen in the age, gender, femorotibial angle before and after the operation, and correction angle between the two groups. In the Dome group, the patellar tendon length became shorter, and the tibial plateau angle decreased significantly than that in the Hemi group without any changes. The degree in the lateral shift of the proximal tibial plateau in the Dome group was significant greater than the Hemi group. The results in this study showed that hemicallotasis open-wedge osteotomy shows little technical difficulties in the subsequent total knee arthroplasty seen after the dome operation, because there are no changes in the patellar tendon length and less deformity of the proximal tibial with respect to the tibial axis postoperatively. These slight changes are considered an advantage of this method.
