Stephenf - My son did not lose any teeth due to radiation, but it probably depends on the type of cancer and where exactly the radiation is directed. Perhaps you could tell us a little more about your own experience and type of oral cancer? My son had SCC (Squamous Cell Cancer) just under the right side of his tongue and had 1/6 of his tongue removed. I'm sure others will be along that can relate more directly to your own experience. It's good you found us here. It's the best place to be for the very latest information and compassionate help. Let us know how you are doing.