Dental X-rays are commonly used to help dentists see areas of the mouth that can’t be assessed by looking alone. If X-rays have been mentioned at your appointment, it’s natural to have questions. This guide explains why dental X-rays are used and what to expect, in simple terms.
This guide is part of our Before Your Appointment series, which explains common aspects of dental visits so you know what to expect.
Some dental problems develop beneath the surface and aren’t visible during a routine examination. X-rays can help your dentist:
Check areas between teeth
Look below the gum line
Monitor changes over time
Plan care safely and accurately
X-rays are only recommended when they’re likely to provide useful information.
Dental X-rays are not taken at every visit. They may be recommended:
At a first dental visit
If you have symptoms such as pain or swelling
To monitor existing dental issues
As part of routine checks at set intervals
Your dentist will explain why an X-ray is being suggested before proceeding.
If this is your first visit, you may also find Your First Dental Visit: What to Expect helpful.
Having a dental X-ray is usually quick and straightforward:
You may be asked to bite gently on a small holder
A protective apron may be placed over you
The image is taken in a few seconds
The process is typically painless and over very quickly.
Dental X-rays use very low levels of radiation. Modern equipment is designed to minimise exposure, and X-rays are only taken when the benefits outweigh any risks.
If you have concerns, it’s always okay to:
Ask why an X-ray is recommended
Ask how often X-rays are taken
Discuss alternatives, if appropriate
Are dental X-rays safe?
They are considered safe when used appropriately and are taken using low radiation levels.
Can I refuse an X-ray?
Yes. You can ask questions or decline, though it’s helpful to understand how this may affect assessment.
Do children have dental X-rays?
X-rays may be recommended for children when needed, using child-appropriate equipment and guidelines.
Dental X-rays are a tool to support your care, not something that’s done routinely without reason. Understanding why they’re suggested can help you feel more comfortable and informed during your appointment.
Clear, calm dental explanations to help you understand symptoms, treatments, and what to expect without pressure or judgment.
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