This almost sounds too good to be true. A 3D printed cast that will make help heal fractures at an astonishing 38-80% faster than plaster casts. The designer, Deniz Karasahin, says:
Osteoid medical cast can also be combined with its complimentary, low intensity pulsed ultrasound (LIPUS) bone stimulator system. For single 20 minute daily sessions this system promises to reduce the healing process up to 38% and increase the heal rate up to 80% in non-union fractures.
You can read more about it on the A Design Award & Competition site here.