Dental X-Rays in Children: Are Routine X-Rays Really Necessary?

When I first took my very young child to the dentist, the visit felt routine—until the hygienist said, “Okay, now we’ll do the X-rays.”

I was caught by surprise, thinking, why would he possibly need an dental X-ray as a child whose permanent teeth have not started erupting yet, so I asked, “Why does he need an X-ray? He isn’t in pain.”

The response from the dental team felt rushed and defensive. And I was ultimately told that without X-rays, cavities between the back teeth could be missed. We moved on, but the interaction and the feeling of “She’s one of those parents…” stayed with me. Notably, this X-ray was offered before the dentist even took a look at my child’s mouth…

Like most parents, I want to make informed decisions about my children’s health. I also know how easy it is to feel guilty for questioning medical advice. I’m not a dentist, but I am a clinician scientist who likes to always get to the source of opinions and recommendations. So, I decided to examine the evidence closely regarding dental X-rays in children—what do expert guidelines say, how strong is the evidence, are they routinely recommended at specific intervals, and is my concern of exposing my child to radiation, however small it may be, justified?

What Are Dental X-Rays in Children Used For?

Dental X-rays enable dentists to detect problems that may not be visible during a visual examination. In children, they are most often used to find cavities early. Dental X-rays use small amounts of ionizing radiation to create images of structures beneath the tooth surface. There are two main types; traditional and digital, with digital X-rays using approximately 80–90% less radiation. They can also be intraoral and extraoral, depending on whether the film and sensor are inside or outside your mouth. Another type is cone beam computed tomography (CBCT). CBCT rotates around the head to create a 3D image of the teeth and jaws, which can be helpful in certain situations—but it also involves more radiation than standard dental X-rays.You can read more details on the types of dental X-rays here.

Are Routine Dental X-Rays Recommended for All Children?

Short answer: No—recommendations are risk-based, not one-size-fits-all.

The American Dental Association (ADA) released updated guidance in 2026 stating that for children without permanent teeth and no signs of dental disease, the X-rays may not be needed if tooth surfaces can be seen and examined. Follow-up imaging depends on whether a child has cavities, with longer intervals for low-risk children.

Individualized radiographic examination with periapical or occlusal views or posterior bite-wing radiographs if proximal surfaces cannot be visualized or probed. Patients without evidence of disease and with open proximal contacts may not require a radiographic examination”.

 

Benavides, Erika et al. “American Dental Association and American Academy of Oral and Maxillofacial Radiology patient selection for dental radiography and cone-beam computed tomography: Clinical recommendations.” Journal of the American Dental Association (1939) vol. 157,1 (2026): 20-35.e5.

What is The Evidence Behind ADA Guidelines for Dental X-rays in Children?

The ADA Council on Scientific Affairs convened an expert panel of 6 members, along with an expert consultant group of 18 members to develop this evidence-based guidance on dental imaging. Because the recommendations are based on expert consensus and not strong long-term studies, an additional level of caution is required. The ADA itself notes limitations in available evidence. “Due to limitations in the available evidence, consensus recommendations rather than formal guidelines were developed.”

For those interested in learning more about this guideline, the ADA provides a detailed summary table with indications for dental X-rays stratified based on age group (children before permanent teeth eruption, children after permanent teeth eruption, adolescents, and adults), and risk level.

Dental X-rays in Children and Risk of Cancer

This entire post began with a split-second reaction I had when an X-ray was offered to my child—one that brought back long-unused knowledge about the increased risks radiation poses to children versus adults.

Children face substantially higher radiation-induced cancer risk than adults due to increased cellular radiosensitivity and longer life expectancy during which radiation-induced cancers can develop. The risk follows a linear dose-response relationship with no clear threshold, meaning even low doses carry some degree of risk. In other words, they are at higher risk because:

• • Their cells divide faster

• • They have more years ahead for radiation-related effects to develop

Some cancers, such as leukemia and thyroid cancer, appear more sensitive to radiation exposure.

That’s why experts emphasize the ALARA (As Low As Reasonably Achievable) principle —especially for children.

In my research, I came across a 2025 systematic review and meta-analysis that looked at whether dental X-rays could increase cancer risk in children. Finding this study honestly made me feel less alone—and less “crazy”—for even questioning it. The takeaway was surprising but important: there is a large knowledge gap when it comes to the potential long-term harms of dental X-rays in kids, and we need better, more up-to-date research. Cancer is, of course, what we worry about most, but right now there isn’t clear evidence proving or disproving an increased risk. What we do know is that children are more vulnerable to radiation-related DNA damage because their cells are dividing and growing so quickly.

During my research, I also learned about an organization called Image Gently – a coalition of healthcare organizations dedicated to providing safe, high-quality pediatric imaging worldwide.

What Is the Image Gently Alliance—and Why Does It Matter?

The Image Gently Alliance is a coalition of healthcare organizations focused on promoting safe, high-quality pediatric imaging by optimizing radiation doses for children. Founded in 2006 within the Society for Pediatric Radiology and formally launched in 2007, it has since joined over 30 medical/dental societies around the world, including American Academy of Pediatric Dentistry (AAPD) in 2013.

Their message on dental X-rays in children is simple:

“One size does not fit all.”

They recommend:

• • Ordering X-rays based on individual need, not routine

• • Using digital or fastest image sensors

• • Adjusting exposure for child size

• • Using thyroid collars

• • Using CBCT only when clearly needed—and at the lowest dose possible

In other words: When we image, let us image gently.

Why are Dental X-rays in Children Considered Safe?

Simply put, not because we have scientific evidence that they are safe, as indicated earlier, but because the radiation dose is comparable to “background radiation” we are all exposed to on a daily basis.

This radiation comes from outer space, sun, the ground, air, water, and even buildings, and it is called natural background radiation. The amount we receive depends on where we live, and for example, people at higher elevations get more radiation from space. In dentistry, X-ray settings should be adjusted to a child’s size to use the lowest radiation possible. Radiation dose is measured in millisieverts (mSv), and dental X-ray exposure can be compared to the amount of radiation we naturally receive each day.

Radiation dose comparison chart

When you look at comparison charts, the radiation from dental X-rays appears quite small, which feels reassuring. Still, those comparisons don’t always capture the full picture. We don’t typically spend days in the sun at once, and it’s worth keeping in mind that radiation exposure can add up over time.

Are Cavities or Problems Commonly Missed Without Dental X-rays?

A 2020 Journal of American Dental Association randomized clinical trial in children aged 3-6 years found no difference in the number of new operative interventions between visual inspection alone and visual inspection combined with dental X-rays.

Notably, the X-ray group had more restoration replacements and a higher number of false-positive results, suggesting potential overtreatment.

The evidence suggests that for low-risk children, visual-tactile examination provides adequate diagnostic accuracy without the radiation exposure inherent to radiographic methods, though X-rays may be beneficial in children with high caries experience or specific clinical indications.

Personal Perspective on Dental X-rays in Children

For now, I have decided to hold off on routine dental X-rays in my children who are just starting to get their permanent teeth up front that are easily accessible to visual examinations. I will likely hold this position until a good quality population study comes out disputing increased cancer risk concern…which may not happen in a long time. At the same time, I do not plan to withhold the necessary X-rays should they have pain or obvious problems where the X-ray will be essential to guide treatment.

Key Takeaways

• • Routine dental X-rays are not automatically necessary for all children. Current recommendations are risk-based and should be tailored to the individual child, not done on a fixed schedule.

• • For low-risk children, visual dental exams may be sufficient. Evidence suggests that cavities are not commonly missed when careful visual inspection is used in children without signs of dental disease.

• • Children are more sensitive to radiation than adults. Their rapidly dividing cells and longer lifetime ahead make minimizing unnecessary exposure especially important.

• • The long-term risks of dental X-rays in children are not well studied. There is a clear knowledge gap, and current evidence neither proves nor rules out increased cancer risk.

• • Radiation dose from dental X-rays is low—but cumulative exposure matters. Small doses can add up over time, particularly when imaging is done routinely rather than selectively.

• • When X-rays are needed, they should be done as gently as possible. This means using digital imaging, child-sized settings, thyroid protection, and avoiding higher-dose scans like CBCT unless clearly indicated.

• • It is reasonable, and appropriate for parents to ask questions. Requesting an explanation for why an X-ray is needed is part of informed, shared decision-making, not a sign of being “difficult.”

• • Balance is key. Necessary X-rays should not be avoided when they are important for diagnosis or treatment, but routine imaging without a clear indication deserves a pause.