Most of the surgeons I've seen for my grade 3 spondylolisthesis at L5-S1 recommend two-level fusion from L4-L5-S1. Some recommend posterior only, but most say anterior and posterior for solid 360-degree fusion.
However, one highly-regarded orthopedic surgeon recently recommended one-level only, at L5-S1, with anterior/posterior. I'd definitely prefer one-level fusion over two-level, but am concerned about whether or not this would work well, given that everyone else has said I need two-level. (BTW, L4 and above are in great shape, no disk problems, no signs of any problems.)
I've just started researching on the Internet, but haven't yet really found the kind of information I want (specifically addressing this type of fusion for my type of condition).
Has anyone ever had one-level fusion at L5-S1? If so, for what condition, what approach (ant/post), and how has it worked?