If the surgeon says the nerves were not spared, it would mean that he took the bundles. But, according to a surgeon whose book I read a year or so ago (don't remember the name, but the book was technically edited and printed so badly that I couldn't tell anyone to spend money on it), there is a good possibility that some few nerves might escape the knife, and that others, if the distance was not too great, might reconnect.
I can't speak to the validity of that opinion, but my surgeon also contends that it is possible. He doesn't like the pump, but feels it is better than doing nothing. He prescribed that and daily 5mg Cialis for me. After some time, he added trimix. I will say that the same dose of trimix has had increasing good result, as I got to the correct dose.
Is all of this going to work? I don't know that, but at almost 4 years out I'm on Lupron, so I'll have to wait a while yet to find out.