The spine is a maddeningly complex assembly of bone, nerves, cartilage, articular surfaces, vasculature, packed tightly, subjected to immense forces, and articulable is many directions. It is a miracle of evolutionary engineering and a miserable failure. We needed to crawl longer before we stood up and walked as a species.
I have been through 2 spinal fusion surgeries. First, L4-L5, L5-S1. Then L2-L3, L3-L4. One surgery was nine hours the other was eight. Recovery was approximately 1 year for each surgery to complete return to maximum function. It was the hardest thing I've ever done. And news of the need for a second surgery almost crushed me.
But...
I am virtually pain free for 3 years now. My activities are virtually unlimited. No boxing. No golf. Oh boo hoo. I can hike, scuba dive and travel.
Your mileage may vary, but the real question is why? The quality of both surgeons and diagnosticians varies widely across institutions and geography. I am fortunate that I live in a city with the best orthopedic hospital in the US and my surgeon is world renowned in the area of spinal surgery.
It took me ten plus years to get the right diagnosis and find the right clinicians but when I did they repaired my spine to provide me maximum function and pain relief but it is not a new spine. It is never like new. But it'll do what I need it to do.
For anyone in pain. I hope and pray you are relieved of it. Search for the professionals who really know what the fuck their doing and GET WELL!!! Be a zealous and merciless advocate for your own healthcare.