Andrea,
I found Biafine far superior to the Aquaphor which seemed to do nothing at all.

I went into radiation with some open mouth sores on the gums left over from biospies to try to find the primary. I was told that they should still heal but at a slower pace. Since radiation is cumulative they expected them to be healed before the really bad stuff hit. Most did, but one didn't because of location and dry mouth, my tongue was constantly keeping it open. It eventually healed several months after radiation was over but dental surgeon was monitoring it every two weeks for problems. If your surgeon thinks it is ok to start, I doubt there will be a problem.

Take care,
Eileen