How old is your back surgery? I think it's pretty common knowledge among back patients that, you hope for 10 relatively 'good years' per surgery and anything more is icing on the cake. If you get less than 10 well, you hope to get as close as possible to 10 as you can. If your back surgery is recent, read on...
I would recommend that you consider a pain management specialist. If you have Rods after major back surgery, they should have already removed the pain causing issues, such as impinged nerves, etc. What is causing your pain? Not a scar... I know everyone is different, I really do.
My first surgery was done without rods. I never did get relief from that surgery. Finally 9 years later, I was in a wheel chair. Second surgery: I was cut on both sides - about 16 inches on my belly down to my crotch and another 14-16 inches on my back. The surgery was 14 hours. I have rods from L3 to L5-S1. I had more pain in front near my hip where they took the bone to cement the rods... and I wouldn't classify that as pain. I didn't even take an asprin for it. Amazing relief! After being wheel chaired prior to my second surgery, I was taking stairs within 14 hours. I was so giddy I felt like a kid in a candy store!
I have had complete Laminectomy, Foratomy and Discectomy at every one of those levels and then rods 7 years ago. I was completely thankful for the rods.
Sure, I have the occassional bad day, most back patients do. I doubt this is what you wanted to hear, but there it is for what it is worth. Good luck...