Could This 3-D Printed Cast Really Heal Bones Faster?

Having endured plaster and fiberglass casts in my youth (when my ego, overestimating my limited athletic ability, was writing checks my body couldn’t cash), I can say that even if the ultrasound part of this is not effective, having a cast where the limb can “breathe” would be a huge win, in terms of bathing and accessing itchy areas.