Artificial orthopaedic implants; Biodegradable bone fixation implants; Implant materials (prosthesis) for use in surgery; Implants (prosthesis) for use in bone grafting; Implants (prosthesis) for use in tendons; Implants for osteosynthesis; Lag screws in the nature of orthopaedic surgical implants; Orthopaedic implants; Orthopaedic joint implant prostheses; Devices for the fixation of bone fractures; Bone graft substitutes; Surgical graft materials; Surgical grafts (artificial materials); Knee prostheses