Printed Prehensile is a theoretical concept for prosthetic hands that would mirror the exact structure of the human form. Existing prosthetics are limited in their design and cannot replicate the same range of motion as the human hand. Fraser Leid felt that by using 3D printing technology, he could develop an artificial limb that more closely mimics how a real human hand moves.
The human hand is made up of 27 different bones, each of which interact in ways that provide a range of motion and capacity for manipulation. The Printed Prehensile prosthetic would mirror the human form and contain 27 similar joints. Each feature of the prosthetic hands would be molded from human bones in order to more accurately replicate the structure of the human skeleton.