Horses’ knees are like human ones, and that’s good news for both species.

It means that continuing research at Colorado State University aimed at helping horses with osteoarthritis –missing cartilage –also is applicable to humans as well, said Dr. Wayne McIlwraith. That’s significant, because nearly 21 million Americans suffer from osteoarthritis. After heart disease, it’s the second leading cause of long-term disability in the United States.

McIlwraith, a surgeon and director of the Equine Sciences Program at Colorado State’s College of Veterinary Medicine and Biomedical Sciences, has worked for the past 12 years on horses with osteoarthritis –cartilage loss that causes bone to rub against bone, producing pain and loss of movement.

"Naturally occurring clinical conditions in the horse, as well as our models, simulate the human situation a lot better than earlier models did," McIlwraith said. "For example, osteoarthritis can develop in a horse in one-tenth the time that it takes to develop in humans

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