SURGICAL AND MEDICAL APPARATUS AND IMPLEMENTS FOR USE IN SURGERY AND ORTHOPEDIC SURGERY; ORTHOPEDIC ARTICLES, NAMELY, SURGICAL IMPLANTS COMPRISED OF ARTIFICIAL MATERIALS; SURGICAL APPARATUS AND INSTRUMENTS FOR ORTHOPAEDIC SURGERY; ARTIFICIAL BONE IMPLANTS; ARTIFICIAL JOINT IMPLANTS; ARTIFICIAL SPINAL COLUMN IMPLANTS; SPECIALIZED SURGICAL TOOLS FOR INSERTING IMPLANTS