Jeremy Simon from 3D universe was able to create a 3D-printed hand that he calls the Cyborgbeast. It’s a completely mechanical device made from ABS plastic with a series of flexible cords that allow it to act like a real hand.
See: Engineering Update #55: The 3D-printed creation that replaced a $42,000 prosthetic
3D Universe targeted Jose Delgado, Jr., a 53-year old who was born without most of his left hand. Delgado had previously relied on a myoelectric version that costs $42,000. But the 3D-printed e-NABLE Hand only costs about $50.