Kaya, HuseyinDastan, Ali EnginBicer, Elcil KayaTaskiran, Emin2020-12-012020-12-0120200749-80631526-3231https://doi.org/10.1016/j.arthro.2020.06.024https://hdl.handle.net/11454/61870Purpose: the primary aim was to evaluate the influence of the surgical modification on posterior tibial slope (PTS) and patellar height in open-wedge high tibial osteotomy (OWHTO). the secondary aim was to evaluate the influence of preoperative mechanical axis deviations (MA) on PTS Methods: Between January 2014 and February 2016, patients with a diagnosis of medial-compartment osteoarthritis who had undergone OWHTO with posteromedial osteotomy technique with a minimum follow-up of 3 months were included in this retrospective study. Preoperative and postoperative PTS angles with 3 different methods and patellar heights with respect to the InsalleSalvati and CatoneDeschamps indices were measured on lateral radiographs by 2 observers. Patients were grouped according to preoperative MA (either <10 degrees or >= 10 degrees). PTS changes were compared between groups Results: Thirty consecutive knees of 28 patients were evaluated. Preoperative mean PTS angles were 9.50 degrees +/- 4.47 degrees (posterior tibial cortex referenced), 11.51 degrees +/- 4.50 degrees (tibial anatomical axis referenced), and 10.80 degrees +/- 4.58 degrees (posterior fibular cortex referenced); postoperative angles were 6.10 degrees +/- 4.23 degrees, 8.78 degrees +/- 4.57 degrees, and 8.11 degrees +/- 4.55 degrees, respectively. PTS was significantly decreased postoperatively with respect to all 3 methods (P <.0001). Mean preoperative and postoperative InsalleSalvati indices were 1.04 +/- 0.16 and 1.07 +/- 0.17, respectively (P 1/4 .088). Mean preoperative and postoperative CatoneDeschamps indices were 0.87 +/- 0.18 and 0.78 +/- 0.18, respectively (P = .017). PTS changes were not statistically significant between groups with respect to MA (P values.861,.723, and.727, respectively) Conclusions:en10.1016/j.arthro.2020.06.024info:eu-repo/semantics/closedAccessArticle361027102717WOS:0005806570000232-s2.0-8508855923432634477Q1Q1