I had to have my teeth all removed before rads and chemo was started, but that was after the neck dissection and partial tongue removal. Mine were pulled because of the rad seed impknats being to be put in my tongue VIA my chin. They said they would decay and rot from the implants . It's been 5 months since they left me, and it might be another yr before the Dr will approve my getting dentures. Good luck and i hope this helps and doesn't create a worry.