thoracic lumbar vertebra pedicle screw in white background

accessory background bolt bone disc discectomy fix fracture fusion health hospital implant implantation instrument instrumentation isolated lamina laminectomy lumbar material medical metal metallic microdiscectomy neurology orthopaedic orthopedic orthopedical pedicel pedicle poliaxial polyaxial screw silver spinal spine stainless steel surgery surgical three titanium vertebra vertebral white