Total knee arthroplasty for post-traumatic arthrosis

The outcomes of total knee arthroplasty for post-traumatic arthrosis were studied in 31 knees. The average age at arthroplasty was 60 years old (range, 36-78 years). The interval from fracture to total knee arthroplasty averaged 13 years. Simultaneous corrective osteotomy was necessary in 4 patients to correct axial alignment and preserve ligamentous integrity. Follow-up averaged 46 months. Mean arc of motion increased significantly, from 94 degrees to 100 degrees (P = .027). Average function score improved from 44 to 72 points. This change was statistically significant (P<.0001). Knee Society knee scores also improved significantly, from 36 to 78 points (P<.0001). At most recent follow-up, the functional scores were considered excellent or good in 58%; knee scores were considered excellent or good in 71% of cases. All periarticular osteotomies and tibial tubercle osteotomies healed uneventfully within 16 weeks. Complications occurred in 57% of cases, including aseptic failure (26%), septic failure (10%), patellar tendon rupture (3%), patellar subluxation (6%), thromboembolism (6%), and wound breakdown requiring debridement and muscle flap coverage (6%). Despite significant improvements in motion and function, patients with post-traumatic arthrosis are susceptible to high rates of complications. Adverse outcomes can be minimized by restoring limb alignment, soft tissue balance, and component alignment and by preserving vascularity of the skin and subcutaneous tissues.