From what I understand talking to the rep for one of the roller companies, she stated many of the Derm and Cosmetic clinics use it for the face - somewhat like dermabrasion but the needles penetrate thru the skin to inject collagen/restyline, etc., for fresh, young skin. Then when PRP treatments came along.......
I've spoken to several doctors who are utilizing the prp treatment and they didn't feel the rollers were a necessary part of their prp protocol.
I hadn't heard of the rollers for Minox before, interesting. Seems like it would hurt like crazy rolling all those needles on a scalp without administration of local anesthetic.