Evaluation of a surgical technique for repair of equine accessory carpal bone fractures.

In 9 horses, osteotomies were performed to simulate accessory carpal bone fractures. Screw fixation, aided by a large C-clamp, was performed on 6 of the 9 horses. Three were treated conservatively, as controls, with fractures not repaired; they remained clinically lame throughout the 6-month study. Fibrocartilaginous nonunion developed in each of the 3 controls. At 150 days, the principals were free of lameness, with evidence of bony union. The results of clinical, radiographic, and pathologic evaluations showed surgical repair to be superior to prolonged rest in treating equine accessory carpal bone fractures.