Prevalence The occurrence of xerostomia after do Radition Therapy in Patients with Head and Neck Cancer

Radiotherapy of the head and neck area total dose 20 Gy may affect rainfall saliva. there are differences between the bulk saliva before radiotheraphy with bulk saliva after radiotherapy total dose of 20 Gy.bulk saliva before radiotherapy with bulk saliva after radiotherapy total dose of 40 Gy. and the bulk of saliva after radiotherapy total dose of 20 Gy to bulk saliva after radiotherapy total dose of 40 Gy.Xerostomia is one side effect of radiation therapy to the head and neck are the most common. This situation is a symptom and not a disease, which is generally associated with reduced saliva.For patients this situation is not pleasant so are the dentist is a difficult problem