When I had rods & screws, L4-5 done, the doctor informed me that since I had previously been somewhat in a bent position in that area, that after surgery, I would still have a slight permanent bend. He said the rods and screws would be placed the same way. Not sure if this would apply to your situation. He felt I wouldn't notice it too much because since I had been that way for some time. (I was not aware that I had been in the position until he had mentioned this prior to surgery.)