High-tibial osteotomy is one of the most valuable methods of treatment for osteoarthritis of the knee. The results of barrel-vault osteotomy were investigated. The results of 35 osteotomies have been reviewed from 10 to 66 months (average of 29.7 months). Postoperative gait pain, hydrops, range of motion, and X-ray findings were compared with preoperative states. The results were evaluated with Maquet's criteria; 26 (74.3%) excellent, 4 (11.5%) good and 5 (14.3%) fair results. Gait pain and hydrops were remarkably reduced at the time follow-up, but range of motion was almost unchanged. Although there were some factors influencing the results, femorotibial angle, mechanical axis and α-angle had relatively wide range (p<0.05). Tibial angle was closely related (p<0.01).
