While degenerative disease of the navicular bone is common, actual fracture of the navicular bone is rare. Fracture usually results from direct and severe trauma. Exercise at speed over rocky ground can result in this fracture.
This fracture usually results in a very severe lameness with very slow improvement over time but no return to athletic performance.
Radiographs must be interpreted carefully due to packing defects and cracks in the frog that can look like fractures.
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Prognosis & Relevant Factors
Horses with navicular fracture generally have a poor prognosis for return to athletic soundness.
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