Dental X-Ray
Learn why dental X rays are used, how often they may be needed and how modern imaging is selected to minimize unnecessary radiation exposure.
Dental X rays, also called radiographs, allow us to see structures that cannot be evaluated with a visual examination alone. Depending on the type of image, radiographs can help identify decay between teeth, bone changes around teeth, infections, impacted teeth, root anatomy and other findings that affect diagnosis and treatment planning.
How often do dental X rays need to be taken?
There is no single schedule that is appropriate for every patient. Current recommendations emphasize taking radiographs when the expected diagnostic benefit justifies the exposure. The interval depends on age, symptoms, cavity risk, gum health, previous dental work and whether prior images are recent enough to answer the clinical question.
When useful diagnostic images are available from another dental office, we may be able to review those rather than repeat them.
Common types of dental imaging
- Bitewing radiographs: commonly used to evaluate the areas between back teeth and the surrounding bone.
- Periapical radiographs: show the entire tooth from crown to root and the surrounding bone.
- Panoramic radiographs: provide a broad view of the jaws, teeth and nearby structures.
- Cone beam CT: provides three dimensional information and is reserved for situations where the added detail is expected to change diagnosis or treatment planning.
Are dental X rays safe?
Dental radiography uses ionizing radiation, so unnecessary exposure should always be avoided. Modern digital systems and appropriate beam limitation can keep exposure low. The goal is not to take images on a routine calendar simply because time has passed. It is to obtain the minimum imaging needed to answer a clinical question.
What about lead aprons and thyroid collars?
Current American Dental Association guidance no longer recommends routine abdominal or thyroid shielding for dental radiographs because modern equipment, proper positioning and limiting the X ray beam to the area of interest are more effective ways to reduce unnecessary exposure. We also follow applicable California radiation safety requirements.
Can dental X rays be taken during pregnancy?
When clinically necessary, dental radiographs can be taken during pregnancy. The decision is based on the patient's dental needs and the diagnostic information required. If you are pregnant or think you may be pregnant, please tell us so we can review your care in context.
Imaging at Palo Alto Oral Health
Radiographs are one part of a comprehensive dental examination. Dr. Sharma uses the examination, your history and the imaging that is actually needed to make treatment recommendations.
Request an appointment if you have questions about dental imaging or a specific dental concern.
