Radiation therapy uses high-energy beams, such as X-rays and protons, to kill cancer cells. Radiation therapy is most often delivered from a machine outside of your body (external beam radiation), though it can also come from radioactive seeds and wires placed near your cancer (brachytherapy).Radiation therapy is often used after surgery. But sometimes it might be used alone if you have an early-stage mouth cancer. In other situations, radiation therapy may be combined with chemotherapy. This combination increases the effectiveness of radiation therapy, but it also increases the side effects, you may experience. In cases of advanced mouth cancer, radiation therapy may help relieve signs and symptoms caused by the cancer, such as pain.
The side effects of radiation therapy to your mouth may include dry mouth, tooth decay and damage to your jawbone.
Your doctor will recommend that you visit a dentist before beginning radiation therapy to be sure your teeth are as healthy as possible. Any unhealthy teeth may need treatment or removal. A dentist can also help you understand how best to care for your teeth during and after radiation therapy to reduce your risk of complications.