I have a two-level ACDF scheduled 1/3/12. My doctor has given me the choice between allograft and autograft - he's explained the difference, explained the risks of each, but left it to me. Everything I find online about it is just personal experience and opinion -- and even when it's a doctor's opinion (even my own doctor's opinion), I would really prefer to also see research to back it up.
I know that autograft means another site to heal that could be more painful than my primary surgical site, and could carry with it some additional complications (nerve or muscle damage, infection, etc.). But I also know that allograft can reduce the chance of (or pace of) fusion.
I'm really hoping that someone can link me to some real studies on this topic.