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  • Title: Incomplete oblique sagittal fractures of the dorsal cortex of the third metacarpal bone in six horses.
    Author: Watt BC, Foerner JJ, Haines GR.
    Journal: Vet Surg; 1998; 27(4):337-41. PubMed ID: 9662776.
    Abstract:
    OBJECTIVE: To describe incomplete oblique sagittal dorsal cortical fractures of the equine third metacarpal bone, their surgical repair, and subsequent performance of the horses. STUDY DESIGN: Retrospective examination of medical records and racing performance. ANIMAL POPULATION: Six Thoroughbred race horses, 2 to 4 years of age. METHODS: Radiographic confirmation of all fractures preceded general anesthesia and surgical correction. Three fractures were treated by intracortical compression using screws placed in lag fashion, and five fractures were treated by osteostixis. Race records were reviewed for each horse to determine performance after surgery. RESULTS: Fractures were best observed on palmarodorsal radiographic projections. Three horses treated by intracortical compression returned to racing, but fracture recurred in one horse and was treated by osteostixis. This horse and the other three horses treated by osteostixis raced after surgery. CONCLUSIONS: Horses with incomplete oblique sagittal fractures of the dorsal cortex of the third metacarpal bone can race after surgical management of the fracture by screws placed in lag fashion or osteostixis. The authors' preferred surgical procedure for managing this fracture is osteostixis. CLINICAL RELEVANCE: Palmarodorsal radiographic projections of the third metacarpal bone are recommended in young Thoroughbred race horses suspected of having dorsal metacarpal stress fractures.
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