Prosthesis is an artificial device that replaces a missing body part, which may be lost through trauma, disease, or a condition present at birth (congenital disorder). Prostheses are intended to restore the normal functions of the missing body part. Amputee rehabilitation is primarily coordinated by a physiatrist as part of a inter-disciplinary team consisting of physiatrists, prosthetists, nurses, physical therapists, and occupational therapists.Prostheses can be created by hand or with Computer-Aided Design (CAD), a software interface that helps creators design and analyze the creation with computer-generated 2-D and 3-D graphics as well as analysis and optimization tools.