Alliance, NE Guide to Safe Dental X-rays

Dental X-rays use a small amount of ionizing radiation to show parts of the teeth, jaw, and surrounding bone that cannot be seen during a routine examination. For most patients, appropriately prescribed dental X-rays are considered safe because the expected diagnostic benefit outweighs the small radiation risk. ([ada.org](https://www.ada.org/resources/ada-library/oral-health-topics/x-rays-radiographs?utm_source=openai))

Are dental X-rays safe?

Yes. Dental X-rays involve low radiation exposure, especially compared with many other medical imaging procedures. Safety depends on using an X-ray only when it is clinically useful, selecting the appropriate type of image, and using the lowest exposure that produces a diagnostic-quality result.

Dental professionals follow the principle known as ALARA: “as low as reasonably achievable.” In practice, that means avoiding unnecessary images, limiting the X-ray beam to the area being examined, positioning the patient carefully, and using equipment and techniques designed to reduce exposure. ([ada.org](https://www.ada.org/resources/ada-library/oral-health-topics/x-rays-radiographs?utm_source=openai))

The radiation dose from an individual dental image is small, but exposures from different medical and dental sources can accumulate over time. That is why a current dental office may ask about recent X-rays taken elsewhere before repeating them.

Why are dental X-rays needed?

A visual examination cannot reveal every dental problem. X-rays can help identify:

• Cavities between teeth or beneath existing fillings
• Infection around a tooth’s root
• Bone loss related to gum disease
• Impacted or developing teeth
• Jawbone changes, cysts, or other abnormalities
• Dental injuries that are not fully visible
• The position of teeth before certain treatments

For children, images may help monitor tooth development and determine whether permanent teeth are developing or blocked beneath the gums. For adults, X-rays may be useful when symptoms, previous dental treatment, gum disease, or a higher risk of decay makes hidden problems more likely.

The need for an X-ray should be based on a clinical examination, health history, symptoms, age, dental development, and risk factors—not simply on a fixed calendar schedule. Federal guidance and professional recommendations emphasize that radiographs should be taken when the information is expected to affect diagnosis or treatment. ([fda.gov](https://www.fda.gov/radiation-emitting-products/medical-x-ray-imaging/selection-patients-dental-radiographic-examinations?utm_source=openai))

How often should someone have dental X-rays?

There is no universal schedule that applies to every person. Someone with a low risk of decay and no concerning symptoms may need images less often than someone with frequent cavities, extensive dental work, gum disease, dry mouth, or a history of oral infections.

Common types of dental images include:

• Bitewing X-rays: Show the upper and lower back teeth together and are often used to look for decay between teeth.
• Periapical X-rays: Show an entire tooth, including the root and surrounding bone.
• Panoramic X-rays: Provide a broad view of the jaws and teeth.
• Cone-beam computed tomography, or CBCT: Creates three-dimensional images and is generally reserved for situations where lower-exposure images cannot answer the clinical question.

A panoramic image or CBCT scan is not automatically a better choice than a small intraoral image. The appropriate examination is the one that provides the needed information with the least unnecessary exposure.

Are dental X-rays safe for children?

Dental X-rays can be used safely in children when they are individually selected and properly adjusted. Children are more sensitive to radiation than adults, so exposure settings should be based on the child’s size, age, and the specific diagnostic question. Pediatric guidance emphasizes selecting images for individual needs rather than using routine imaging without a clinical reason. ([aapd.org](https://www.aapd.org/research/oral-health-policies–recommendations/prescribing-dental-radiographs-for-infants-children-adolescents-and-individuals-with-special-health-care-needs/?utm_source=openai))

A child may need an X-ray if there is concern about hidden decay, an injury, unusual tooth development, swelling, pain, or teeth that are not erupting as expected. A child who has no symptoms and a low risk of dental disease may not need the same images as another child of the same age.

Parents can reasonably ask:

• What problem is the X-ray intended to evaluate?



• Could a previous image answer the question?
• Is a smaller or lower-exposure image sufficient?
• How will the result affect the child’s care?

These questions are part of informed decision-making, not a challenge to the need for appropriate imaging.

What about pregnancy?

If pregnancy is possible, suspected, or confirmed, tell the dental team before imaging. Dental X-rays may still be performed when medically necessary, but the decision should consider the urgency of the problem and whether the image can safely be postponed.
A properly performed dental X-ray directs the beam toward the mouth, not the abdomen. Current safety practices focus on justifying the examination, limiting the beam, using appropriate exposure settings, and avoiding repeat images. Patients should not delay urgent evaluation of severe tooth pain, facial swelling, trauma, or possible infection solely because of pregnancy; the imaging decision can be discussed in that context. ([ada.org](https://www.ada.org/resources/ada-library/oral-health-topics/x-rays-radiographs?utm_source=openai))

Should a lead apron or thyroid collar always be used?

Many people were taught that every dental X-ray requires a lead apron and thyroid collar. Updated professional recommendations have shifted toward emphasizing beam restriction, proper positioning, equipment quality, and optimized exposure settings. The American Dental Association’s current guidance does not recommend routine patient shielding for dental imaging because shielding can interfere with the X-ray beam and, in some cases, lead to repeat images. ([ada.org](https://www.ada.org/resources/ada-library/oral-health-topics/x-rays-radiographs?utm_source=openai))
This does not mean radiation protection is being ignored. It means the most effective protections are generally built into the imaging process itself. State requirements, equipment design, and clinical circumstances may also affect office procedures.

What can Alliance residents do to reduce unnecessary exposure?

Residents can help maintain an accurate imaging history, particularly when moving between dental offices or receiving care after an accident. Keeping track of approximate dates and types of recent dental images can help prevent avoidable duplication.
This can be especially practical for households managing children’s dental records, orthodontic evaluations, emergency visits, or long travel distances across the region. A request to obtain a previous image may take time, but it can sometimes prevent a repeat examination.
Patients should also mention:

• Recent dental or medical imaging
• Pregnancy or possible pregnancy
• A history of radiation treatment involving the head or neck
• New symptoms, swelling, trauma, or changes in bite
• Difficulty staying still or tolerating the image sensor

Dental X-rays are not risk-free, but the risk from appropriately selected images is very small. The central safety question is not whether every X-ray should be avoided. It is whether a specific image is justified, properly performed, and likely to provide information that improves care.