Total Knee Arthroplasty in Varus Deformity

Inclusion Criteria: 1. Patients over 18 years of age with grade 3-4 knee osteoarthritis (according to Kellgren-Lawrence) and pain score of 5 or higher on a 10-point VAS scale. 2. Varus deformity of the lower limb (HKA angle \<177°, or varus \>3°) 3. Anesthesia risk according to the ASA scale of no more than III. 4. BMI less than 35 kg/m2. 5. Patient must be monitored throughout the entire study period (12 months). 6. Patient must be mentally competent and compliant. 7. Patient must provide written informed consent to participate in the study. Exclusion Criteria: 1. Body mass index \> 40 kg/m². 2. Instability of the collateral ligaments of the knee joint requiring the installation of ligamentous systems, presence of primary severe bone defects. 3. Impaired weight-bearing ability of the contralateral limb. 4. Presence of metal implants or foreign bodies in the lower extremities. 5. Previous knee interventions, such as reconstruction of the knee ligament apparatus, or corrective osteotomies of the femur and tibia. 6. Patient refusal to participate in the study. 7. Patient failure to comply with the recommendations of the treating physician or the prescribed regimen.