What specialty is best for the doctor who manages your Dupes treatments?

I need to find a doctor but don’t know what kind of doctor to look for. I have fairly significant damage from the disease. I’m getting radiation,which I sought myself, but I will need more treatment, I think. Or/and maybe I need splints? The disease is rapidly ruining my hands, not just my pinkies, but my hands are really cupping. It accelerated like crazy over the last 7 months. The area I live in has no specialists so I’ll have to travel to get good care. Meanwhile, does anyone have experience with using splints?