your family member who had a stroke and now they think that you will have to have a replacement.

I checked and the reverse replacement is what they do when athletes injure their shoulders. One football quarterback got his hip crushed and they did a reverse hip replacement and he came back the next year to play and even plays pro now. I don't remember who had the reverse shoulder replacement so that I can look him up to see what he is doing now, but it was the first time I ever heard of it.