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The intervertebral discs make up one-fourth of your spinal column and act as the spine's shock absorbing system, protecting the vertebrae, spinal cord, and other structures. However, sometimes these discs degenerate and thin, causing the vertebrae they support to get closer together and pinch the nerves that exit between them.

In severe cases, these discs are removed and replaced with bone harvested from the pelvis. This is called spinal fusion. Many doctors choose to approach ... more