Patty
I am sure Jerry or Brian are more qualified than me to answer this question,but i would say the dentist was absolutely wrong to carry out this procedure without taking the necessary precautions.At the very least i would have expected him to give you antibiotics to take after the procedure just in case an infection developed.The treatment you received when the symptoms of pain developed after the dental work also sounds pretty shoddy.

All in all it sounds like the dentist isn't trained in the specialised care of post radiotherapy patients and maybe your doctor needs a refresher course too.when things go wrong it can be a bit like a train wreck,with one mistake knocking on to another with disasterous results,and you are the innocent victim.

Its a setback patty and i hope you can get back on the road to recovery soon.

love liz