I suspect it's personal preference. I have a Fixxglove that I no longer use. I purchased it for the left hand with the aluminium plate on the palm or inside. Then some years later I started occasionally using the same glove on the right hand which means the plate is on the dorsal or top side. I think maybe I preferred it on the top. But the main thing I found at the time was to bend slightly the fingers of the plate, so that some tolerable degree of comfort was achieved to be able to wear the glove overnight.

I no longer wear it so it's languishing in the cupboard. I disliked the temporary finger stiffness it can induce that is apparent in the morning if worn overnight.

Other users on here have posted about using a popsicle or ice-lolly stick as a cheaper and yet still functional alternative.
https://www.dupuytren-online.info/Forum_...ace-0_2313.html