I know nothing about ringbone but I got a call from a customer yesterday who said she waited for two years for her horse to recover from ringbone, she said something about the vet telling her that it "fused"? She said that it was traced back several generations and proved to be hereditary? I have had personal experience with upward fixation of the patella and rehabbed it for the most part with lots of straight line trotting and eventually internal blisters. They are very inexpensive, it's an iodine solution injected into the ligaments of the stifle and lasts around 4-6 months at a time. I think I paid $35 to have it done by our horse vet and it cost more when I hauled the horse into and equine hospital to do it again.