Quick answer: Dental X-rays for children involve very little radiation. A set of four bitewings delivers about 0.005 mSv, less than a person absorbs from the environment in an ordinary day, and dental imaging accounts for under 1% of the collective radiation dose Americans get from medical imaging. How often your child needs them depends on cavity risk, not on a fixed schedule: the AAPD suggests bitewings every 6 to 12 months for higher-risk children and every 12 to 24 months for lower-risk ones. There’s also no set age for a first X-ray; what usually prompts it is a child’s back teeth closing together, which creates surfaces a dentist can no longer see.

X-rays are the part of a pediatric dental visit parents ask about most, and that’s reasonable. Radiation sounds serious, children are small, and nobody explains the machine before it swings toward your kid’s face. The answers are more reassuring than most parents expect, and they’re worth having before you’re in the room deciding on the spot.

Why Does My Child Need X-Rays at All?

An exam covers the surfaces a dentist can see, and a lot of what matters in a child’s mouth isn’t one of them. X-rays show decay starting where two teeth touch, which is where many childhood cavities begin and where nothing is visible until it’s large. They also show decay under the enamel, infection at a root, permanent teeth developing in the jaw, teeth that are missing or extra, and whether there’s room for what’s coming.

The practical value is timing. A cavity caught between teeth on an X-ray is usually a small filling. The same cavity found once it’s visible or painful is often a much bigger appointment.

How Much Radiation Is Actually Involved?

Less than almost anyone guesses. A set of four bitewing X-rays delivers roughly 0.005 mSv, which is less than the background radiation an average person picks up from soil, air, and space over the course of a normal day. A seven-hour flight delivers around 0.02 mSv, roughly the equivalent of sixteen small dental X-rays. The ADA notes that all dental imaging combined accounts for less than 1% of the total radiation dose Americans receive from medical imaging, against an average annual exposure of about 6.2 mSv from all sources.

Modern equipment is much of the reason. Digital sensors need far less exposure than the film most parents remember, and the ADA specifically recommends digital receptors over film.

How Often Should My Child Have X-Rays?

There’s no universal schedule, and the ADA is explicit that no one-size-fits-all interval exists. The AAPD bases the interval on cavity risk:

• Higher-risk children, meaning those with existing cavities or other risk factors: bitewings every 6 to 12 months with baby teeth, and every 6 to 18 months once permanent teeth start coming in.
• Lower-risk children with no cavities and no elevated risk: every 12 to 24 months with baby teeth, and every 18 to 36 months in the mixed stage.

So a child with no history of decay may go two or three years between X-rays, while a child who has had several cavities may need them twice as often. Risk changes over time, and so should the interval. The governing principle is ALARA, as low as reasonably achievable: take the images that will change a decision, and no others.

At What Age Do X-Rays Start?

There isn’t an age. The AAPD is direct about this: the timing of a child’s first radiographs should not be based on age but on that child’s individual circumstances. Some children need an image as toddlers because their back teeth are touching and can’t be inspected visually. Others don’t need anything for years. What usually prompts the first X-ray is the back teeth closing together, which creates surfaces a dentist can no longer see.

What Kinds of X-Rays Might My Child Have?

• Bitewings: the most common. Your child bites on a tab and the image captures the crowns of the upper and lower back teeth, which is where between-teeth cavities show up.
• Periapical: shows a whole tooth from crown to root tip and the bone around it. Used for pain, injury, or a suspected infection.
• Panoramic: one wide image of the whole jaw, taken by a machine that rotates around the head without anything in the mouth. Useful for tracking developing permanent teeth, wisdom teeth, and jaw structure.
• Cone beam CT: a three-dimensional scan for specific situations like an impacted tooth or surgical planning. It carries a higher dose, so the ADA advises using it only when lower-exposure images won’t answer the question.

Can We Just Skip Them?

You can decline, and we’d rather have that conversation than have you quietly skip appointments. Just understand the trade. Without X-rays a dentist can only assess the surfaces that are visible, and the ones that go unseen are exactly where decay tends to start. Declining doesn’t shrink the risk, it hides it for longer. If cost is the concern, say so, because that’s a different problem with different solutions.

How We Approach X-Rays at Paper Planes Pediatric Dentistry

We take the fewest images that will actually tell us something: asking what a picture would change before taking it, using digital sensors, and setting each child’s interval by their own cavity risk rather than the calendar. Parents in Garden City and Great Neck ask about this often, and we’d rather talk it through than have anyone consent to something they’re uneasy about. If you want to see what we’re seeing, just ask.

Frequently Asked Questions

Are dental X-rays safe for children?

Yes. The dose is very small, about 0.005 mSv for a set of four bitewings, which is less than a typical day of natural background radiation. Modern digital equipment and restricted beam sizes keep exposure low, and dentists only take images that will affect a decision.

Do baby teeth need X-rays if they’re going to fall out?

Sometimes, yes. Decay between baby teeth can cause pain and infection and can affect the permanent tooth developing underneath. X-rays also confirm those permanent teeth are forming and positioned correctly.

Is digital better than the film X-rays I had as a kid?

Yes. Digital sensors require considerably less radiation than film, produce an image instantly, and can be enlarged on screen. The ADA recommends digital receptors over conventional film.

What if my child won’t hold still or gags on the sensor?

That’s common and manageable. Smaller sensors, different positioning, a panoramic image that requires nothing in the mouth, or simply waiting until a later visit are all options. Nobody forces a child through an X-ray.

Can I stay in the room with my child?

Practices differ, and staff follow state regulations on who may be present during exposure. Ask your dentist, and mention it if you are pregnant so the team can plan accordingly.

How much do X-rays add to the cost of a visit?

It depends on the number and type of images and on your plan, since most dental insurance covers routine bitewings at a set interval. Ask for an estimate before the appointment.

Questions about your child’s X-rays? Contact Paper Planes Pediatric Dentistry in Garden City, NY to schedule a checkup or just to talk it through: call (516) 894-0718 or book online here). We welcome families from Garden City, Great Neck, and across Long Island.