John, I received traditional radiation to cure my tonsil cancer more than 5 years ago and lost all my saliva glands. I am glad that I still have all my teeth alive today without using any tools or medicine to keep them. Like Cathy, I brush my teeth after each meal and before sleeping. My teeth decay faster than healthy people and so I need to go to the dentist more frequently and have more fillings done. I refrain from eating sour or sweet food or drink and if I do, I will brush my teeth immediately or rinse my mouth with water, if I am not home. I often take sugar free gum to moisten my mouth and this can also help clean up my teeth a little bit.