MOST fractures associated with the racehorse involve the bones which form the fetlock joint, the lower cannon and the pastern bone, or the small bones in the knee.

Within the hoof there are two main bones, the pedal bone and the smaller navicular bone. The pedal bone is the large bone that attaches to the hoof wall and provides strength and stability. The navicular bone meanwhile is a small bone, which lies behind the pedal bone.