Most people who had radiation treatment in the last 5 years (or so) had IMRT, which means that you are in good company.
>>>see also
http://www.oralcancerfoundation.org/facts/radiation.htmtypically there are 30-35 treatments 5 times per week resulting in 6-7 weeks total time. Other treatments for example twice a day are possible but not standard.
Teeth: that seems variable: I did not have to remove a single tooth before the treatment. Later on one molar bit the dust... use the fluoride trays.
Radiation itself is painless, however the longer term effect it has are not. Typically the initial few weeks 2-3 are a non event except for the fact that you likely loose all taste. (which comes as a surprise even if you know that it will happen). The last weeks and especially the week(s) after radiation are most miserable. I am not trying to frighten you. But it may help to know what MAY happen. We all react somewhat differently, some work throughout the treatment others are pretty much sidelined. You may want to look into a PEG tube and discuss this with your team. Should you get chemo you might also bring up a port.
M