Are dental X-rays safe?
Yes, when they are justified. According to RadiologyInfo, run by the American College of Radiology and the Radiological Society of North America, a typical dental X-ray gives an adult a dose comparable to about one day of natural background radiation, and a panoramic X-ray about three days. A 3D CBCT scan is higher, so it is used only when 3D detail changes treatment. At Creative Arts in Dubai, X-rays are taken only when they show something an examination cannot.
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How much radiation is in a dental X-ray?
Radiation dose in medical imaging is usually given as an effective dose, measured in millisieverts (mSv). It allows different scans to be compared with each other and with the natural background radiation everyone receives every day from the ground, the air, food and space.
Dental X-rays sit at the very bottom of that scale. Each image is aimed at a small area, exposes it for a fraction of a second and, with digital sensors, needs relatively little radiation to produce a clear picture. The American Dental Association describes dental imaging as a minor contribution to a person's total radiation exposure from all sources, and notes the US National Council on Radiation Protection's estimate of about 6.2 mSv per person per year from all sources combined.
The table below shows typical figures for an average-sized adult, set against the days of natural background radiation they are comparable to.
Dental X-ray doses compared with natural background radiation
Typical adult effective doses published by RadiologyInfo (ACR and RSNA).
| Exam | Typical adult effective dose | Comparable natural background radiation |
|---|---|---|
| Dental X-ray | About 0.005 mSv | About 1 day |
| Panoramic X-ray (OPG) | About 0.025 mSv | About 3 days |
| Dental cone beam CT (CBCT) | About 0.18 mSv | About 22 days |
| Intraoral 3D scan | None; it uses light, not X-rays | Not applicable |
Actual doses vary with the equipment, the settings and, for CBCT, the size of the area scanned. Doses for children differ from adult figures because of their size.
If the dose is so small, why does justification still matter?
Radiation protection is built on caution: even very small doses are assumed to carry a very small risk, so every image should have a reason and the dose should be kept as low as reasonably achievable. That principle is why a good dentist does not take X-rays out of routine, and why the same principle cuts both ways.
Not taking a needed X-ray has its own risk. Decay between back teeth, an abscess at the root tip, bone loss from gum disease, an impacted tooth or a cyst are often invisible to the eye. Missing them can mean a larger filling, a root canal or a lost tooth later. A justified dental X-ray is low risk; an unjustified one is a small risk with no benefit.
How often should you have dental X-rays?
There is no fixed calendar. The ADA states that the interval between dental X-rays depends on your oral health, age and risk of disease, so there is no one-size-fits-all schedule, and that X-rays should be selected for individual needs rather than taken as a routine. In practice:
- Someone who keeps getting new cavities may need bitewings more often than someone who has had no decay for years.
- A new patient without recent images usually needs a baseline, chosen according to what the examination finds.
- Pain, swelling, an injury or a broken tooth justify an image at any time.
- Recent X-rays from another clinic can often be used instead of new ones, so bring them.
Our page on the dental check-up explains how X-rays fit into an examination, and check-up cost explains how they affect the fee.
Why are lead aprons and thyroid collars no longer recommended?
Many people remember a heavy lead apron and a collar around the neck. In 2024 the ADA published updated recommendations stating that lead abdominal aprons and thyroid collars are no longer recommended for dental X-rays, and that this applies to all patients regardless of age or health status, including pregnancy. The ADA also notes that shields can get in the way of the X-ray beam, which can mean a retake and therefore more radiation, not less.
The reason is that modern dental equipment narrows the beam tightly to the area being imaged, and digital sensors need short exposures. Protection now comes from taking only justified images, using the smallest suitable field and avoiding repeats. Practice can vary between clinics and countries, so if you are used to a shield and are not offered one, ask the dentist to explain; that is a reasonable question.
Are dental X-rays safe during pregnancy?
Tell the dentist if you are or might be pregnant. The ADA's 2024 recommendations apply regardless of pregnancy, and its guidance notes that studies of pregnant patients receiving dental care have affirmed the safety of dental treatment. A dental X-ray is aimed at the mouth, far from the abdomen.
In practice, routine check-up X-rays are often postponed until after the pregnancy simply because they can wait. An X-ray needed to diagnose pain, swelling or infection is a different matter: an untreated dental infection is a risk in pregnancy too, so the dentist discusses why the image is needed and takes the minimum required. Our guide to dental care during pregnancy covers treatment timing more broadly.
Want to know which X-ray you need and why? See how bitewings, periapicals, panoramic X-rays and 3D CBCT scans are chosen at Creative Arts, and what each one shows.
See dental X-rays and CBCTAre dental X-rays safe for children?
Children need dental X-rays less often than adults with problems, and when they do, the exposure is adjusted to their size. The ADA supports Image Gently, a campaign to "child-size" imaging: the fewest images that answer the question, settings suited to a smaller body and intervals based on the child's decay risk rather than a schedule.
Typical reasons in children include checking for decay between back baby teeth that are touching, assessing a knocked tooth, and following the development of adult teeth before orthodontic treatment. Parents can always ask what the X-ray is for and whether a previous image can be used. See children's dental care for the wider picture.
2D X-ray or 3D CBCT: when is the higher dose justified?
A CBCT scan gives far more information than a flat X-ray, at a higher dose. It should be ordered for a question that only 3D can answer.
| The question | Usually answered by | Why |
|---|---|---|
| Is there decay between my back teeth? | Bitewing X-rays | Shows the contact areas a mirror cannot see, at a very low dose |
| Is this tooth infected at the root? | A periapical X-ray | Shows the whole tooth and the bone around the root tip |
| Where are my wisdom teeth? | A panoramic X-ray, with CBCT only if a root lies close to the nerve | The overview is usually enough; 3D is added when it changes surgical planning |
| Is there enough bone for an implant? | CBCT | Bone width and the position of nerves and sinuses cannot be measured on a flat image |
| Routine check-up, no symptoms | No X-ray, or bitewings if your risk calls for them | CBCT is not a screening tool |
For CBCT, a small field covering only the area in question uses less radiation than a scan of both jaws.
How do clinics keep dental X-ray doses low?
Several everyday choices keep the dose down. Digital sensors generally need less radiation than the film used in the past, and images can be adjusted on screen instead of being retaken. The beam is narrowed to the area being examined. For CBCT, the smallest field that answers the question is chosen, so a scan of two or three teeth uses far less than a scan of both jaws.
Just as important is avoiding repeats. Images are part of your dental record: keep copies, and bring them when you see a new dentist or ask for a second opinion. Recent X-rays often mean no new ones are needed.
Four questions to ask before any dental X-ray
What will this image show? Will the result change my treatment? Can my recent X-rays from another clinic be used instead? Is a smaller image enough? A dentist who takes images for a reason will be glad to answer, and you are entitled to a copy of your images for your own records.