In medicine, a prosthesis (plural prostheses) (from Greek πρόσθεσις) 's an artificial extension that replaces a missing body part. It's part of the field of biomechatronics, the science of fusing mechanical devices with human muscle, skeleton, and nervous systems to assist or enhance motor control lost by trauma, disease, or defect. Prostheses are typically used to replace parts lost by injury (traumatic) or missing from birth (congenital) or to supp… (More on Prosthetic)