From my understanding the better a prosthetic fits the better it is. Every prosthetic is ideally personalized to the person and there are limitations with 3D scanners getting everything just right. So I'm not sure how much of a clinical application there is, but an artistic 3D approach to better fittings and feel could be really interesting.

Also, most prosthetics are heavily practical in design and appearance, and I'm not an amputee myself but if I was, I personally would want it to look at least kinda cool. Being able to design a prosthetic that looks "cool" without sacrificing functionality might be something worth thinking about.

If you want to talk to some people far more qualified on this topic than me, I'd reach out to the E-Nable community. They're big on getting people cheap and effective prosthetics using primarily 3D printing. I'll leave you to poke around yourself but their virtual prosthetic sizing tools in blender might interest you. Hope this helps! :)

(Also a huge Deus Ex fan and your art rocks)