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THE OUTCOMES OF TOTAL KNEE ARTHROPLASTY FOR THE TREATMENT OF VARUS OSTEOARTHRITIS AT VIET DUC UNIVERSITY HOSPITAL
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Abstract
Objectives: To evaluate the clinical characteristics, X-ray images, and outcomes of Total Knee Arthroplasty for knee osteoarthritis with varus deformity at Viet Duc Friendship Hospital from May 2024 to March 2025. Materials and Methods: A prospective, descriptive, non-controlled, cross-sectional study was conducted on 51 patients with knee OA and varus deformity ranging from mild (>3˚) to severe (≥20˚), classified according to the Thienpont E (2016) system, who underwent TKA at Viet Duc University Hospital from May 2024 to March 2025. Results: The mean age of patients with varus deformity was 60–69 years, with a predominance of female patients. Common symptoms were pain on ambulation, accounting for 76.9%, and the average range of flexion-extension motion was 108∘±8.45∘. Clinically, varus deformity accompanied by flexion contracture was the most frequent presentation at 55.8%. Radiographically, Kellgren-Lawrence Grade IV osteoarthritis accounted for 82.7%. Regarding the degree of varus alignment, mild varus (3∘ to <10∘) was the most common at 55.8%, moderate varus (10∘ to <20∘) was 38.4%, and severe varus (≥20∘) was observed in 3 knees (5.8%). Postoperatively, the mechanical axis of the lower limb significantly improved to 8.0∘±2.9∘. The mild and moderate varus groups achieved a neutral mechanical axis, while the severe varus group still had residual varus alignment, changing from 22.0∘±2.0∘ preoperatively to 5.2∘±1.1∘ postoperatively. The clinical and functional outcomes of the knee significantly improved after surgery, with a Knee Society Score (KSS) of 85.0±3.9 and a Knee Function Score (KFS) of 85.2±5.5. Conclusion: Total knee arthroplasty in varus knee patients successfully achieved neutral mechanical alignment in the majority of cases. Patient knee function, pain levels, and range of motion showed marked improvement compared to the preoperative status
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Keywords
Varus deformity, total knee arthroplasty.
References
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