Hello Daughter, Dental health is very important for anyone undergoing radiation to the head and neck. It is probably worth the wait to have appropriate dental work done before radiation treatment starts. Mucoepidermoid carcinoma is uncommon compaired to squamous cell carcinoma and as such has less known results and less known survival statistics. We have discussed statistics here at length. Remember each patient is their own statistic. Either a survivor or not.
That said I wonder if something can be started now to cause progress without delay?

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.