Are Dental X-Rays Safe? Radiation, Frequency, and Digital X-Rays Explained

By Dr. Boris Zusin · Published September 10, 2026

“Do I really need an x-ray?” is one of the most common questions we get, and it's a fair one — nobody wants unnecessary radiation exposure. The short answer is that dental x-rays use a very small fraction of the radiation most patients assume, and current guidance from the American Dental Association and FDA is built around taking exactly as few as clinically needed, not a fixed routine.

Why We Take Them at All

A visual exam alone can't see everything. X-rays reveal cavities forming between teeth (before they're visible or painful), bone loss below the gumline from gum disease, infections at the root tip, impacted teeth, and the position of nerves and sinuses before procedures like implants or extractions. Diagnosing and treatment-planning without imaging, when it's actually needed, means working partially blind.

How Much Radiation Is Actually Involved

The numbers are smaller than most people expect. A single bitewing x-ray delivers roughly the same radiation as one day of ordinary background exposure — the radiation you get anyway from soil, air, and cosmic rays just by living on Earth. A full mouth series is still a small fraction of your annual background exposure. According to a 2024 expert panel report commissioned by the ADA, the average American's total radiation exposure from all sources — medical and non-medical combined — is about 6.2 millisieverts per year, roughly half of that from natural background sources alone. Dental imaging accounts for less than 1% of the total radiation dose Americans receive from medical imaging overall, a category dominated by CT scans and other larger procedures.

The Principle Behind How We Decide

Dentistry follows what's called the ALARA principle — As Low As Reasonably Achievable — which means every x-ray has to be individually justified by a clinical reason, not taken on a fixed schedule “just in case.” Updated 2026 patient-selection guidance from the ADA and the American Academy of Oral and Maxillofacial Radiology is explicit that there's no one-size-fits-all interval for dental x-rays: how often you need them depends on your age, current oral health, and personal risk factors for disease, not a blanket annual rule. A patient with a clean history of no cavities and healthy gums may go longer between x-rays than someone with active decay or periodontal disease.

Digital X-Rays vs. Older Film

Digital x-rays, which is what we and the large majority of practices use today, require significantly less radiation than the older film x-rays many patients remember from years past, in addition to producing images instantly and allowing us to zoom in and adjust contrast rather than retaking a shot that came out unclear. If it's been a while since your last dental visit, the equipment doing the imaging has genuinely improved.

A Recent Change Worth Knowing About: No More Lead Aprons

If you've had dental x-rays before, you probably remember being draped in a heavy lead apron and thyroid collar first. That's no longer standard practice. Updated 2024 radiation-safety recommendations from an ADA-convened expert panel advise against routine use of lead aprons and thyroid collars during dental imaging — not because radiation exposure is being taken less seriously, but because modern equipment already delivers such a low dose that the shielding can actually interfere with getting a clear image, sometimes prompting a retake (and therefore more total exposure, not less). Today's safety approach instead relies on rectangular collimation (narrowing the x-ray beam precisely to the area being imaged), correct patient positioning, and digital sensors — all of which reduce dose more effectively than a lead apron did. If your dentist doesn't offer one anymore, that reflects current best practice, not a shortcut.

X-Rays During Pregnancy

Routine dental care, including x-rays when clinically necessary, is considered safe during pregnancy. A randomized clinical trial examining dental treatment safety in pregnant women found no increase in adverse pregnancy outcomes among women who received dental care, including necessary imaging, during pregnancy. That said, we'll always confirm your pregnancy status and time non-urgent imaging thoughtfully — there's rarely a reason to rush an elective x-ray when it can reasonably wait, even though the actual risk from a clinically necessary one is very low.

X-Rays for Kids

The ADA has joined more than 80 other health organizations in the “Image Gently” campaign, which is built around “child-sizing” radiographic exposure for kids — using the fastest available image receptor, collimating the beam tightly, and reducing exposure time relative to what an adult would receive for the same image. Children's x-rays aren't just smaller versions of adult ones; the settings are adjusted specifically for them.

The Bottom Line

We only take x-rays when there's a real clinical reason — a new patient with no recent imaging on file, a symptom that needs investigation, or a stage in treatment planning where imaging genuinely changes the plan. If you have recent x-rays from a previous dentist, bring them (or have them sent) so we're not repeating imaging you don't need. If you have specific concerns about radiation — pregnancy, a recent CT scan, or anything else — raise it at your visit and we'll walk through exactly what's being proposed and why.