Femoral Head Allografts for Talar Body Defects

Abstract

Background: Large structural bone deficits after a failed ankle arthroplasty or avascular necrosis (AVN) of the talus present a complex reconstruction challenge. The aim of this study was to report the results of patients undergoing an ankle arthrodesis or tibiotalocalcaneal fusion using a femoral head allograft (FHA). Methods: All ankle and tibiotalocalcaneal fusions using FHA between February 2006 and January 2019 were included. Forty-four patients (45 ankles) with a mean follow-up of 42.8 months were studied. Males accounted for 58.1% (25/43 patients). All patients had either failure of primary or revision total ankle arthroplasty (TAA) or AVN of the talus. Pre- and postoperative Veterans RAND Health Survey (VR-12), Foot and Ankle Ability Measure (FAAM), Ankle Osteoarthritis Scale (AOS) and visual analog scale (VAS) for pain scores were obtained. A patient satisfaction survey was distributed postoperatively and results were tabulated. Results: Preoperatively to postoperatively, the VR-12 Mental score remained essentially unchanged ( P = .752) and the VR-12 Physical score improved ( P = .007); the FAAM Activities of Daily Living (ADL) and Sport scores improved ( P < .001); the AOS Pain and Disability scores improved ( P < .001); and the man VAS score improved ( P < .001). The overall satisfaction rate was 78.6 on a 100-point scale. At an average of 18.7 weeks, 90.7% of the ankles were substantially fused. Five patients went on to nonunions and revision surgery. Conclusion: The use of FHA to treat talar defects was a viable option. In this complex patient population, the arthrodesis rate was high at 89% with very positive patient-reported outcome scores. Level of Evidence: Level IV, case series.