Dentist after radiation?

I had 6 1/2 weeks of radiation. surgery and chemotherapy in 2011.  I
they had teeth extracted in 2016 and had 30 hyperbaric oxygen treatments
for
extractions; to help heal bones.  Now it's April 2018 and I have more dental problems.  We also reduced saliva production.
I now live in Killeen, Texas and wonder if there are dentists who specialize in patients who have had oral cancer (the basis of the tongue and
lymph nodes)?
I've heard a lot of conflicting things.  Can someone give me advice?  I wish I could have dentures.