Bone substitutes for surgical use; Bone void fillers comprised of artificial materials; Dental prostheses; Medical, surgical and orthopaedic implants made of artificial materials; Orthodontic appliances; Orthopedic joint implants made of artificial materials; Orthopedic supports; Prosthetic instruments for dental purposes; Surgical apparatus and instruments for dental use; Surgical instruments for use in orthopedic and spinal surgery