I had total disc replacement surgery in my neck and back, c5 and l4. Fusion was an option but this was better for me....perhaps inquire? I see this thread is a bit old, but wanted to let you know you may have more options. I am normal weight so I don't know about how obesity would factor in....just that my surgeon said it was good I wasn't overweight. Good luck...I found surgery worth it. My chronic pain is neck and back but c5 and l4....no problems.