Tehran University of Medical Sciences Journal of Orthopedic and Spine Trauma 2538-2330 5 1 2020 07 20 12 6 EN Morteza Saeb Faculty of medicine, Kermanshah University of medical sciences,Taleqani Hospital, Kermanshah, Iran Seyyd saeed Khabiri Faculty of medicine, Kermanshah University of medical sciences,Taleqani Hospital, Kermanshah, Iran Monireh Yaghoubi Faculty of Medicine, Kermanshah University of Medical Science, Kermanshah, Iran Ali Mousapour Faculty of Medicine, Kermanshah University of Medical Sciences,Taleqani Hospital, Kermanshah, Iran Keykhosro Mardanpour Faculty of Medicine, Kermanshah University of Medical Sciences,Taleqani Hospital, Kermanshah, Iran Roya Safari-Faramani Department of Epidemiology School of Public Health Kermanshah University of Medical Sciences, Kermanshah, Iran Alireza Shafiee Kermanshah University of Medical Sciences,Taleqani Hospital, Kermanshah, Iran Adel hojabrian Kermanshah University of Medical Sciences,Taleqani Hospital, Kermanshah, Iran Sepehr Rahimipour Kermanshah University of Medical Sciences,Taleqani Hospital, Kermanshah, Iran 2020 02 24 2020 03 21 Background: Open wedge high tibial osteotomy (OWHTO) is commonly utilized to correct genu varum. To decrease various complications of OWHTO, some modifications are needed. Methods: In a parallel randomized controlled clinical trial, 42 patients were divided into two groups: conventional OWHTO (control group) and OWHTO with the cut in the sagittal plane or distal tubercle osteotomy (OWHTO/DTO) (intervention group). Evaluation of the following items was conducted pre- and post-operatively: Knee Society Score (KSS) questionnaire, incidence of postoperative complications, patellar height by Blackburne-Peel (BP) ratio and Insall-Salvati Index (ISI), posterior tibial slope (PTS), tibiofemoral angle (TFA), Q-angle, medial proximal tibial angle (MPTA), three joint alignment radiography, and union radiological parameters. Results: The differences between preoperative and postoperative variables including the KSS, PTS, TFA, BP Index (BPI), ISI, MPTA, and Q-angle within the intervention and control groups were not statistically significant. In four cases (3 in the control group and 1 in the intervention group), the delayed union was observed but the complete union was achieved after a mean of 23 weeks. No nonunion was observed. Conclusion: Our results showed equal effectiveness for OWHTO/DTO compared with the conventional OWHTO. https://jost.tums.ac.ir/index.php/jost/article/view/159 https://jost.tums.ac.ir/index.php/jost/article/download/159/144