Medical and surgical apparatus and instruments, namely, mechanical tools and surgical instruments of plastic and/or metal and/or polymer materials for facilitating installation of prostheses and prosthetic components, and orthopedic fixation devices used in orthopedic transplant and/or implant surgery; orthopedic joint implants and prostheses, prosthetic sockets, and structural parts of the same; surgical splints and supporters; computer-aided surgical devices for positioning of prostheses an...