Dental X-rays (Radiographs)


How often should X-rays be taken?

Dr. Erickson recommends a full series of X-rays every 4 years for most people. This enables him to view the entire set of teeth in a comprehensive manner and notify the patient of any concerns. Every 2 years, Dr. Erickson recommends a set of 4 "bitewing" films to look closely at the middle and back teeth for any cavities (tooth decay).

If you are a new patient, Dr. Erickson will recommend a full series of radiographs to determine the present status of the hidden areas of your mouth and to help analyze changes that may occur later.


How do dental X-rays work?

When X-rays pass through your mouth during a dental exam, more X-rays are absorbed by the denser parts (such as teeth and bone) than by soft tissues (such as cheeks and gums) before striking the film. This creates an image on the radiograph. Teeth appear lighter because fewer X-rays penetrate to reach the film. Cavities and gum disease appear darker because of more X-ray penetration. The interpretation of these X-rays allows the dentist to safely and accurately detect hidden abnormalities.