I use splints on everything else, when it's really bad. You can't wear them all the time, or muscles weaken, but I think the metal ones should keep it firm and let the joint rest
Best of Luck!!!!

Is splinting useful for wrists as well? My wrists (as well as elbows) have been very painful lately, with twisting motions or bending upwards particularly so. With my profession involving high use on the computer, I know I tend to overuse my hands.

Used splints at night to support hands and stop fingers clawing before medication got a grip on the disease. When had some issues a few months back was given special overnight gloves to wear by hospital which seem to work as well. Dont need them all the time.

There are also plastic supports you can get made to fit your hands. I have a hand/ wrist support like this made for me which I wear when situation at point where cant lift or hold things. But this disease comes and goes and can leave it off for long periods of time.

I was also referred to a physio therapist who gave me finger and wrist exercises. I do these fairly regularly (can do in bed) on the bad and the better hand to try to maintain my flexibility as much as possible.

I dont think using splints will cause more damage but dont know point from which you are starting. If fingers are clawed you need help to "unclaw" them as far as possible... I think gentle exercise helps with this disease.

I used Oval 8 splints on pinkies in the beginning to prevent too much twisting. Plastic and hardly noticeable (kind of see through). A little pricy, but worth it to me. Bought on Amazon

I have strong braces for all my major joints and when they go koo-koo, I use the brace. Wearing them at night helps a lot more than one would think, and doesn't weaken muscles cause you aren't using them anyway!
I think the compression helps some too.