Abstract
Background: Varus deformity is predominantly the most common deformity seen in candidates for Total Knee Arthroplasty (TKA). Adjusting a stable knee prosthesis and restoring both the limb and the joint line position to fit the normal mechanical axes have been shown to have an important bearing on the outcome of TKA. Objective: To choose an appropriate level of the constraint of knee prosthesis intraoperatively after a proper gap and soft tissue balancing in primary TKA in the advanced osteoarthritic knee with sever varus deformity. Methods: Our study was a prospective case series study including 45 knees with primary advanced osteoarthritis (OA) in varus deformity ≥ 15° totally intraarticular conducted for primary TKA. Results: The range of movement (ROM) increased from a mean of 85.15° to a mean of 100.75°.The mean flexion deformity enhancement was 1.7 postoperative in comparison with 9.088 preoperative. Clinical scores were significantly improved postoperatively. The average Knee Society Scoring (KSS) was 86.8 compared with the average pre-operative KSS of 23.089. The average Knee Function Score (KFSS) was 80.67 compared with the average pre-operative KFSS of 37.44.
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