BONE SCREWS; BONE PLATES; SPINAL RESTORATION FIXATOR; ARTIFICIAL INTERVERTEBRAL DISK IMPLANTS; INTERVERTEBRAL FUSION DEVICES, NAMELY, FUSION PUMPS AND RETRACTORS; INTERVERTEBRAL FUSION IMPLANTS; EXTERNAL FIXATOR FOR ORTHOPEDIC SURGERY; OCULAR, ORTHOPEDIC JOINT AND BONE IMPLANTS WITH POROUS METALLIC SURFACES FORMED BY ETCHING