Can we be honest about spinal fusion surgery? Comment👇 PLAN to watch the full video for the best fusion rehab plan. ⚠️ If you have a spinal instability from spondylolisthesis or degenerative disc disease, a spinal fusion surgery can fix the problem, but it will NOT fix the root CAUSE of the problem. The part that is fused can no longer move, so other parts of the spine must compensate for mobility, usually at the next level above the fusion. This can cause you to need more fusion surgeries. The