Sinan YILMAZ, Osman TECİMEL, Umut ÖKTEM, Alperen KORUCU, Durmuş Ali ÖÇGÜDER
Baltalimanı Dergisi - 2026;2(2):31-38
Background: The aim of this study was to compare the effects of monoplanar and biplanar medial open-wedge high tibial osteotomy on patellar height, posterior tibial slope, union time, and clinical outcomes in patients with medial compartment osteoarthritis and varus alignment. Methods: Fifty-nine knees of 57 patients who underwent medial open-wedge high tibial osteotomy between 2015 and 2020 were retrospectively evaluated. Patients were divided into two groups according to the osteotomy technique: monoplanar (n=27) and biplanar (n=32). Preoperative and postoperative mechanical axis, patellar height indices (Caton-Deschamps, Blackburne-Peel, Insall-Salvati), posterior tibial slope, and union time were assessed radiographically. Clinical outcomes were evaluated using the Knee Injury and Osteoarthritis Outcome Score (KOOS). Results: Both techniques significantly corrected varus alignment, with no difference in postoperative mechanical axis values. Patellar height decreased slightly in both groups but remained within normal limits, with no significant intergroup difference. However, the change in patellar height was greater in the monoplanar group (p<0.01). Posterior tibial slope did not change significantly in either group. Union time also did not differ significantly between the groups. KOOS scores improved significantly in both groups postoperatively. Conclusion: Medial open-wedge high tibial osteotomy is an effective treatment for medial compartment osteoarthritis in appropriately selected patients. Both monoplanar and biplanar techniques preserve patellar height, although the biplanar technique may allow more precise adjustment. The two techniques provide similar results in terms of posterior tibial slope, union time, and clinical outcomes. Future studies involving newer multimodal versions of large language models may clarify their potential role in medicaleducation and assessment.
