The normal 'treatment' is palliative which helps the symptoms, generally temporarily, as it is conventionally considered incurable & progressive. Tends to be shoes with pads, raising the heels gradually more as the 'treatment' ceases to be effective.
Underrun 'no heels', long toes, broken back pastern axis, or high heels tend to be major factors. Getting hooves (back) into functioning form is a big part of the answer. Dr Robert Bowker is very well worth looking up, as is Mayfield Barehoof Care Centre Home Page & many other sites & sources to learn more.
I have been so involved with advise from my vet and farrier that I had somewhat forgotten all the great stories of barefoot rehab. I am going to rededicate myself to finding someone to at least TRY with my guy before I go to the extreme of Nerving him which is not the real answer......