If you are about to have radiation treatment to your head and neck area, there are a few things you need to know about your oral health. Sometimes you can experience a decrease in salivary flow. Saliva is important to keep your mouth moist and to clear away food from your teeth. Without adequate saliva, you can be at a higher risk for cavities. Your dentist could recommend salivary substitutes and daily home fluoride treatments to protect your teeth. It is also important to have a comprehensive examination of your mouth and have necessary dental treatment completed before you start your radiation therapy.