Repair of a Comminuted Talar Neck Fracture using a Cellular Bone Allograft combined with a Textured Allograft Wedge

Abstract

Category: Trauma; Ankle Introduction/Purpose: Talar neck fractures are uncommon and are characterized by displacement, comminution, and soft tissue injury. Treatment of talar neck fractures while avoiding complications, such as osteonecrosis and long-term morbidity, presents a unique challenge to surgeons. One option for treating talar neck fractures is cellular bone allograft containing viable lineage- committed bone cells (V-CBA), which provides the osteoconductive, osteoinductive, and osteogenic properties needed for bone formation. Additionally, a structural textured allograft (STA) wedge designed to resist migration and sustain compressive force can also be used in repairing talar neck fractures. This case study describes the successful repair of a comminuted talar neck fracture using V-CBA combined with an STA wedge. Methods: A 46-year-old male patient sustained a talar neck fracture following a fall from a 12-foot ladder. Radiographic and computed tomography (CT) imaging revealed significant comminution, consequent varus angulation, and a large bony void, as well as dislocation of the posterior subtalar joint. The patient was otherwise healthy with no comorbidities. Open reduction internal fixation was performed laterally to reduce the posterior subtalar dislocation. Medially, a 6.5mm STA wedge was used to correct the varus deformity and 1cc of V-CBA was used to fill the void. Results: At 6 months, the talar neck fracture had healed with solid osseous consolidation evident on radiographic images. Conclusion: These results demonstrate that an STA wedge, with a textured design that resists migration, used in combination with a V-CBA successfully repaired a comminuted talar neck fracture.