Donald Corenman, MD, DC
Post count: 8436

Once you have a fusion of that level and it becomes solid (time to fusion depends upon the method and graft used) you will never have another problem with the fused level. The levels below or above will still have about the same risk or slightly higher risk of herniation as before the surgery. You could go play in the NFL (US) with a one level fusion.

Genetics is the best answer for why this hernation occurred. Trauma and other problems can produce herniations but by far, the most common cause of herniation is genetics.

Dr. Corenman