Problems develop in our Horse's Mouths because they eat differently in captivity than the did when they were the Wild.
This is the reason for Equine Dentistry. Horse's Mouths are self maintaining and self healing. Proper Equine Dentistry gets the horse's mouth back to the way nature intended.
If we are able to set their teeth back to their natural angles, they will be able to maintain their own mouth if fed properly after that.