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California Study Links Bone Loss to Sesamoid Fractures

Thursday, 30th July 2020

A recent study at the University of California Davis School of Veterinary Medicine investigated proximal sesamoid bone (PSB) fractures in California racehorses to try and determine if pre-existing abnormalities are associated with these fractures, reported bloodhorse.com. The group consisting of Sarah Shaffer, Dr Susan Stover and colleagues at the JD Wheat Veterinary Orthopedic Research Laboratory studied cases from Thoroughbreds who had died of PSB fractures and a control set of horses who had died of other causes. The results shows the 90% of fractures PSBs had visible discolouration on the surface of the fracture and in 70% of cases, there was evidence of bone loss directly below the cartilage. Changes identified in the bones were more common in horses with PSB fractures than in the control set, and these changes were also more severe in the fractured limb than in the opposing limb. Fractured PSBs had lower bone volume and tissue mineral density within the site of the fraction than in comparable locations in opposing limbs and in control horses.

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