['Open-wedge high tibial osteotomy (OWHTO) is a well-established procedure in the management of medial compartment osteoarthritis and osteonecrosis of the medial femoral condyle. Several studies have evaluated factors that negatively influence outcomes. However, few reports have investigated the effect of age on HTO outcome. We evaluated the influence of the age on the outcome after HTO.', 'The TomoFix', 'There were no statistical differences in the background factors between the two groups. Postoperatively, the mean JOA score showed a significant improvement in both groups. The mean OKS after surgery was 41.6\xa0±\xa05.9 in group A and 41.4\xa0±\xa05.9 in group B. There were no statistical differences in the postoperative knee alignment and clinical outcomes between the two groups.'] Does age affect the clinical and radiological outcomes after open-wedge high tibial osteotomy?