Corrective osteotomy and partial tarsal arthrodesis in two greyhounds with calcaneal malunion

Objective To describe the clinical presentation and outcome of two greyhounds with calcaneal malunions that were treated with corrective osteotomy and partial tarsal arthrodesis. Study design Short case series. Animals Two adult racing greyhounds. Methods Varus and recurvatum deformity of the calcaneus was ascribed to malunion of prior calcaneal fracture with concomitant central bone fracture that had been sustained during racing in both dogs. Both dogs exhibited severe, weight-bearing lameness and had radiographic evidence of moderate to severe osteoarthritis of the proximal intertarsal joint. A closing wedge corrective osteotomy and partial tarsal arthrodesis were performed with a 2.7-mm locking compression plate and cancellous autograft. Results Calcaneal morphology and alignment of the common calcaneal tendon seemed restored postoperatively. The implant was removed in one dog, while the other dog experienced no postoperative complications. Lameness improved in both dogs, although residual intermittent lameness after heavy exercise was reported by owners of both dogs 1 year after surgery. Overall, owner satisfaction and outcome were considered good-to-excellent in both dogs. Conclusion Corrective osteotomy and partial tarsal arthrodesis for treatment of malunited calcaneal fractures may be considered in dogs with clinical signs related to calcaneal malunion.