Tracey,
If your teeth are in good shape you should not need to have any removed. (I have all mine). Consider that you will probably have long term challenges with eating (low saliva and sometimes swallowing difficulties) having teeth will make things easier. That said, go to the dentist that says "keep them" and have him/her really check them out and do what ever to put them in top notch form. I had mine cleaned and a "sealer" put on before treatment began. If you have a lot of metal fillings, ask the radiation oncologist if he/she thinks that the metal might cause problems with the radiation beam itself either by reflecting or absorbing some of the energy.

Teeth that have to be removed after treatments, pose additional potential problems. Those problems can be lessened by Hyperbaric Oxygen Treatments. Discuss this at length with your caregivers

In closing the idea that teeth must be removed is "old school" and many of us have our teeth. (and want to keep them) laugh

Take care

Mark, 21 Year survivor, SCC right tonsil, 3 nodes positive, one with extra-capsular spread. I never asked what stage (would have scared me anyway) Right side tonsillectomy, radical neck dissection right side, maximum radiation to both sides, no chemo, no PEG, age 40 when diagnosed.