Bone screws; Spinal implants composed of artificial material; Bone implants composed of artificial materials; Medical and surgical apparatus and instruments, namely, orthopedic fixation device used in orthopedic transplant and/or implant surgery; Medical and surgical apparatus and instruments, namely, devices used in orthopedic surgery to position surgical instruments, implants and/or patients' limbs; Medical devices, namely, spinal implants composed of artificial materials; Medical, surgical and orthopaedic implants made of artificial materials; Surgical implants comprising artificial material; Surgical implants comprising artificial material and associated surgical instrument sets