I had a PLIF with 2 rods and 4 screws one week ago. Smoking was never EVER discussed by my surgeon. I had tried to stop, but never lasted more than 4 days. Was down to about 7 cigs/day.
I live in a smoke-free building, and although I am on the first floor, there's still a few steps down to the sidewalk. Bottom line is, I can't get outside any more and therefore I can't smoke. Yesterday, I finally got around to reading through all the post-op instructions, and one of them says that "smoking is totally forbidden for 6 months following a fusion". Oh. Well. Alright then.
I can just about get around my apartment now, but haven't been outside yet. I will need someone with me for that, because of the stairs. I am probably being over-cautious, but staying in means I am staying smoke-free!