The temporomandibular (TM) joints in horses are evolutionary masterpieces that have evolved over 55 million years. But suddenly, the experts are saying that the joints are failing because the mouth has become "unbalanced." I disagree.

The experts say that unridable horses have pain in the TM joints that connect the jaw to the skull. Their conclusion is that the teeth are "unbalanced," with an uneven bite seen with the incisors and an imperfect angle of the cheek teeth's chewing surface. Their conclusions cannot be resolved using First Principles Thinking. I've worked with horses for over 50 years, and for over 40 of those, I've floated teeth on over 80,000 horses, but I cannot draw the same conclusions these experts can about the association between the shape of the incisors and the TM joints.

I am referencing an article printed in the Journal of the American Veterinary Medical Association (March, 2024) by James L. Carmalt, VetMB, PhD, DABVP, DAVDC, DACVSMR, DACVS from the Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada. The title is: "Equine poor performance: the logical, progressive, diagnostic approach to determining the role of the temporomandibular joint." There are numerous quotes from this paper I could use to substantiate my position on any dysfunction of the horse's TM joints; however, the author's words are worth reading in their entirety.

It must be noted that humans, according to my dentist, chew about 2000 times a day, or 735,000 chews in a year. However, horses chew between 10,000 and 40,000 times a day, with the median being 25,000. This number becomes 750,000 chews in 30 days, which is more than humans chew in a year. Horses chew about 9 million times in a year. So, to assume that all horses are developing TM joint problems because their teeth are not "balanced" seems preposterous.

If you are interested and have time, please read Dr. Carmalt's paper, which is available as an attached PDF at Community.TheHorsesAdvocate.com or online.

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