ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Intervertebral bone implant, X-ray. Frontal view of a bone implant between the lumbar and sacral vertebrae (lower back bones) of a 34 year old patient. The implant is between the 5th lumbar and 1st sacral vertebrae (L5 and S1) where the intervertebral disc has worn away. Intervertebral discs are flat, circular structures that contain cartilage and line the joints between the vertebrae. They act as shock absorbers and cushion the spine during movement.
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