Postoperative laxity of the lateral soft tissue is largely negligible in total knee arthroplasty for varus osteoarthritis

Purpose: To evaluate the integrity of lateral soft tissue in varus osteoarthritis knee by comparing mechanical axis under stress during navigation-assisted total arthroplasty before and after compensating for a bone defect with implant. Methods: Sixty-six knees that underwent were investigated. The operated was evaluated manual immediately exposure implantation. correlation between each value degree preoperative deformity compared regression analysis. Results: maximum increased proportion to deformity. Moreover, implantation Therefore, severity leads progressive laxity tissue. However, coefficients much smaller than those measured (0.99 vs 0.20). Based on results formula, postoperative negligible, provided an appropriate thickness implant compensated cartilage medial compartment without changing joint line. Conclusion: even if is severe, most cases may not require additional procedures address residual laxity.