Yes, kids need X-rays at the dentist. Dental X-rays reveal cavities forming between teeth, monitor how permanent teeth are developing below the gum line, and detect problems in the jawbone that a visual exam alone cannot identify. The Centers for Disease Control and Prevention (CDC) reports that approximately 50% of children aged 6 to 9 have already had at least one decayed, filled, or missing tooth, and many of those cavities start in areas only an X-ray can reach. Digital X-rays used in pediatric dentistry today produce 80 to 90% less radiation than traditional film X-rays, making them one of the safest diagnostic tools available for children. Below, we explain exactly what dental X-rays show, when your child should get the first one, how often X-rays are needed, what protections are in place, and what the actual experience looks like for your child.
Do Kids Need Dental X-Rays and Why They Matter
Kids need dental X-rays because a significant amount of dental disease develops in areas that are invisible during a standard oral exam. The surfaces where two teeth touch, called proximal surfaces, are one of the most common sites for cavities in children. Plaque and bacteria collect between teeth where a toothbrush and even floss cannot always reach. Without an X-ray, these cavities can grow undetected until they cause pain, infection, or structural damage to the tooth.
Dental X-rays also play a critical role in tracking your child’s dental development. Children’s mouths change rapidly as baby teeth loosen and permanent teeth push through. X-rays allow us to see whether permanent teeth are developing normally below the gum line, whether baby teeth are loosening on schedule, and whether there is enough space in the jaw for the incoming adult teeth. The American Academy of Pediatric Dentistry (AAPD) and the American Dental Association (ADA) both recommend dental radiographs as a necessary part of preventive dentistry for children when clinical findings or risk factors indicate they are needed.
Beyond cavities and development, dental X-rays help detect conditions that can affect your child’s long-term oral health. Abscesses forming at the tip of a tooth root, cysts developing in the jawbone, extra teeth that have not erupted, and congenitally missing teeth that will never arrive all require X-ray imaging to identify. Catching these conditions early gives your child’s dentist time to plan treatment before a small issue becomes a larger one.
What Do Dental X-Rays Show in a Child’s Mouth
Dental X-rays show cavities between teeth, infections at the tooth root, the position and development of permanent teeth below the gum line, jawbone health, and any abnormalities in tooth structure or count. A visual exam can only evaluate what is visible on the surfaces of the teeth and gums. Dental X-rays extend that evaluation to the internal structures that make up the foundation of your child’s oral health.
One of the most important things X-rays reveal is interproximal decay. Interproximal cavities form on the side surfaces of teeth where two teeth press against each other. According to the CDC, nearly 18% of children aged 6 to 8 have at least one primary tooth with untreated decay. Many of those untreated cavities are interproximal, meaning they were not visible during a routine visual exam and could only be detected with an X-ray. Early detection through radiography allows treatment with a small filling rather than a crown or extraction after the decay has spread. Cavity prevention starts with knowing where the cavities are forming.
Dental X-rays also show the roots of each tooth and the bone that surrounds them. An infection at the root tip, called a periapical abscess, produces no visible symptoms on the surface of the tooth in its early stage. X-rays catch this infection before it spreads into the surrounding bone or causes a painful dental emergency. We keep dental emergencies from happening by identifying and treating these hidden problems early.
Can Dental X-Rays Detect Cavities Between Teeth
Dental X-rays can detect cavities between teeth that are completely invisible during a visual exam. Bitewing X-rays are specifically designed to capture the contact points where teeth touch. These contact points trap food particles and bacteria, making them one of the highest-risk areas for decay in children. Without bitewing radiographs, a cavity growing between two teeth can progress through the enamel and into the dentin before any visible symptoms appear to the eye.
What Types of Dental X-Rays Do Kids Get
The types of dental X-rays kids get include bitewing radiographs, periapical radiographs, panoramic radiographs, and occasionally occlusal radiographs, each serving a different diagnostic purpose.
Bitewing X-rays are the most common type taken in pediatric dentistry. A bitewing captures the upper and lower back teeth in a single image, showing the crowns of the teeth and the bone level between them. Bitewing radiographs are the primary tool for detecting interproximal cavities and monitoring the fit of existing fillings or dental crowns.
Periapical X-rays show the entire length of one or two teeth, from the crown down to the root tip and the surrounding bone. These images are used to evaluate infections at the root, assess trauma damage, and examine teeth that show symptoms like pain or swelling.
Panoramic X-rays capture a broad, single image of the entire mouth, including all teeth, both jaws, the sinuses, and the temporomandibular joints. Panoramic radiographs are especially useful for evaluating the position of permanent teeth that have not yet erupted, identifying impacted teeth, assessing jaw growth, and planning for early orthodontics. A panoramic X-ray is typically taken once a child has a mix of baby and permanent teeth.
Occlusal X-rays capture a wider view of the upper or lower arch of teeth in a single image. These are used less frequently and typically serve to evaluate extra teeth, jaw fractures, or abnormalities in the palate.
At What Age Do Dentists Start Taking X-Rays
Dentists start taking X-rays when a child’s back teeth begin touching each other and the surfaces between them can no longer be examined visually, which typically happens around age 3 but varies by child. The AAPD states in its 2024 Reference Manual that the timing of the initial radiographic examination should not be based on the patient’s age but on each child’s individual circumstances. A child whose back molars touch early may need bitewings before age 3. A child whose teeth have spacing between them may not need X-rays until age 4 or later.
The decision to take X-rays is always based on a clinical examination first. Your child’s dentist evaluates the teeth visually, reviews the child’s medical and dental history, and assesses risk factors for decay before prescribing any radiographs. Radiographic screening before a clinical examination is not recommended by the AAPD or the ADA. We schedule your child’s first visit by age one, but X-rays are not part of that initial appointment unless specific clinical concerns are present.
Do Toddlers Need Dental X-Rays
Toddlers need dental X-rays only when a clinical reason supports the need. Most toddlers do not receive routine X-rays because their back teeth have not yet touched. Toddlers who have experienced dental trauma, who show visible signs of decay, or whose teeth are in tight contact earlier than typical may require X-rays to evaluate conditions below the surface. The AAPD supports radiographs for toddlers when clinically indicated, and digital X-ray technology makes the radiation exposure extremely low even for the youngest patients.
How Often Do Kids Need Dental X-Rays
How often kids need dental X-rays depends on their individual risk for cavities and developmental conditions, not on a fixed schedule. The AAPD recommends that the frequency of dental X-rays be determined by each child’s caries risk assessment. Children at higher risk for decay may need bitewing radiographs every 6 to 12 months. Children at lower risk may need them only every 12 to 24 months.
Risk factors that increase X-ray frequency include a history of cavities, poor oral hygiene, a diet high in sugar, limited access to fluoridated water, visible plaque buildup, and deep grooves in the teeth. Children with no history of decay and strong home care habits often require X-rays less frequently. Your child’s dentist reassesses risk at every visit and adjusts the X-ray schedule accordingly.
The European Association of Paediatric Dentistry recommends that all children receive radiographic evaluation at age 5 (even without visible decay), then again at ages 8 to 9 and 12 to 14, coinciding with key eruption milestones. Between those milestones, bitewing frequency is based on caries risk. High-risk children receive annual bitewings, and low-risk children receive bitewings every 2 to 3 years.
How Many Dental X-Rays Are Safe in a Year
There is no fixed maximum number of dental X-rays that is considered unsafe per year because the radiation dose from digital dental imaging is extremely small. The ADA and AAPD follow the ALARA principle, which stands for “As Low As Reasonably Achievable.” This means your child’s dentist prescribes only the X-rays that are clinically necessary and avoids any imaging that would not change the diagnosis or treatment plan. A child who receives a full set of four bitewing X-rays twice a year is exposed to approximately 0.008 to 0.016 millisieverts (mSv) of radiation total, which is a fraction of the 6.2 mSv the average American absorbs from all radiation sources annually, according to the National Council on Radiation Protection and Measurements (NCRP).
Are Dental X-Rays Safe for Children
Dental X-rays are safe for children. The ADA, the AAPD, the U.S. Food and Drug Administration (FDA), and more than 80 health care organizations participating in the Image Gently campaign all support the use of dental radiographs in pediatric care when clinically indicated. Digital X-rays have reduced radiation exposure by 80 to 90% compared to traditional film radiography, making modern dental imaging one of the lowest-radiation diagnostic procedures in all of medicine.
To put the radiation levels in perspective, a single digital bitewing X-ray produces approximately 1 to 5 microsieverts of radiation. A cross-country flight from New York to Los Angeles exposes a passenger to approximately 30 microsieverts of cosmic radiation. A single day of natural background radiation from the sun, soil, and air exposes every person to approximately 8 to 10 microsieverts. A digital bitewing produces less radiation than a few hours of simply being alive on Earth.
Research published in the Journal of Personalized Medicine analyzed 4,455 intraoral radiographs taken in children and adolescents and found an average effective dose of just 0.77 microsieverts per bitewing image. The study confirmed that radiation doses from pediatric dental X-rays fall well within safe limits and are at the lowest recommended levels for diagnostic efficacy. Dental X-ray procedures account for 39% of all X-ray examinations performed in healthcare but contribute only 0.3% of the total collective radiation dose, according to European Commission data.
| Radiation Source | Approximate Dose | Comparison |
|---|---|---|
| Single digital bitewing X-ray | 1 to 5 microsieverts | Less than a few hours of natural background radiation |
| Set of 4 bitewing X-rays | 4 to 20 microsieverts | Less than one day of natural background radiation |
| Panoramic dental X-ray | 4 to 30 microsieverts | Comparable to 1 to 3 days of natural background radiation |
| Cross-country flight (NY to LA) | ~30 microsieverts | More radiation than a dental bitewing X-ray |
| One day of natural background radiation | ~8 to 10 microsieverts | Ongoing daily exposure from sun, soil, and air |
| Average annual exposure (all sources, U.S.) | 6,200 microsieverts (6.2 mSv) | Dental X-rays represent a tiny fraction of this total |
Sources: National Council on Radiation Protection and Measurements (NCRP); American Dental Association (ADA); Journal of Personalized Medicine (Jena University Hospital study, 2023); Cedars Sinai.
How Much Radiation Is in a Dental X-Ray
The amount of radiation in a dental X-ray depends on the type of image being taken. A single digital bitewing X-ray delivers approximately 1 to 5 microsieverts of radiation. A periapical X-ray delivers approximately 1 to 8 microsieverts. A panoramic X-ray delivers approximately 4 to 30 microsieverts. For comparison, the NCRP estimates that the average American absorbs approximately 6,200 microsieverts per year from all natural and man-made radiation sources combined. A full set of dental X-rays represents a negligible fraction of that annual total.
How Pediatric Dentists Protect Your Child During X-Rays
Pediatric dentists protect your child during X-rays by using lead aprons, thyroid collars, digital sensors, rectangular collimation, pediatric-sized equipment, and the ALARA principle to keep radiation exposure as low as possible. Multiple layers of protection work together to minimize your child’s exposure while still capturing the diagnostic images needed for accurate care.
Here are the specific protective measures used during every pediatric dental X-ray:
- A lead apron is placed over your child’s torso to shield the body from any scattered radiation during the imaging process
- A thyroid collar protects the thyroid gland, which is especially important for growing children whose thyroid tissue is more sensitive to radiation
- Digital sensors require significantly less radiation to produce a clear image than traditional film, reducing exposure by 80 to 90%
- Rectangular collimation restricts the X-ray beam to only the area being imaged, reducing scatter radiation by approximately 60%
- Pediatric-sized sensors are used to fit comfortably in smaller mouths, reducing the need for retakes caused by improper positioning
- Previous X-ray records are reviewed before every appointment to avoid duplicating images that are still diagnostically current
The ALARA principle governs every radiographic decision in our Yorktown Heights office. ALARA stands for “As Low As Reasonably Achievable,” and it means we prescribe only the X-rays that will change the diagnosis or treatment plan for your child. No X-ray is taken as a routine formality. Every image has a specific clinical purpose.
What Happens During a Child’s Dental X-Ray
During a child’s dental X-ray, a small digital sensor is placed inside the mouth, the child bites down gently to hold the sensor in place, and the image is captured in less than one second. The entire process for a single X-ray takes just a few seconds from start to finish. A full set of four bitewing X-rays typically takes under two minutes.
The X-ray is usually taken during or just before your child’s routine dental cleaning and exam. Your child wears a lead apron and thyroid collar throughout the process. The dental team positions the sensor, steps behind a protective barrier, and activates the X-ray machine with a button. The digital image appears on a computer screen within seconds, which allows your child’s dentist to review the results with you immediately during the appointment.
The experience is painless. The sensor is small and smooth, and there is no injection, no drilling, and no discomfort. Some children feel mild pressure from biting on the sensor holder, but the sensation lasts only a moment. Younger children who are not yet comfortable with the process may need gentle coaching, and our team is trained to help children feel at ease throughout the procedure.
What If You Have Concerns About Dental X-Rays for Your Child
If you have concerns about dental X-rays for your child, the best step is to discuss them directly with your child’s pediatric dentist. Every parent has the right to ask why an X-ray is being recommended, what it will show, and how the information will change the treatment plan. A pediatric dentist can explain the specific clinical reason behind each X-ray and help you weigh the diagnostic benefit against the minimal radiation exposure involved.
Skipping X-rays entirely carries its own risks. Without radiographic evaluation, cavities between teeth can grow undetected until they reach the nerve of the tooth. Tooth decay that reaches the pulp often requires a baby root canal or extraction rather than a simple filling. Developmental abnormalities such as impacted teeth, missing permanent teeth, or jaw growth irregularities can go unnoticed until they become more difficult and more involved to treat. The radiation risk from a digital dental X-ray is far smaller than the clinical risk of an undiagnosed condition that goes untreated.
We encourage parents to ask questions at every visit. Open communication between parents and the dental team is the foundation of informed, confident care for your child.
How Dental X-Rays Support Your Child’s Long-Term Oral Health
Dental X-rays are not just a diagnostic tool for today’s visit. They are a long-term record that tracks your child’s oral development from the primary dentition through the full eruption of all 32 permanent teeth. Each set of X-rays becomes a baseline that future images are compared against, allowing your child’s dentist to identify changes over time that a single image alone might not reveal.
Here is what dental X-rays help prevent or detect early:
- Cavities forming between teeth before they become visible or painful
- Infections developing at the root tip of a tooth before they spread to surrounding bone
- Permanent teeth that are developing in the wrong position or are not developing at all
- Extra teeth (supernumerary teeth) that could block normal eruption
- Bone loss around the teeth that could indicate early periodontal concerns
- Jaw growth patterns that may require orthodontic intervention
- Damage from trauma that is not visible on the tooth surface
X-rays also play a direct role in orthodontic planning. A panoramic radiograph shows the position of every developing tooth and the relationship between the upper and lower jaws, which helps your child’s dentist determine whether early intervention with braces or appliances is beneficial. At our practice in Yorktown Heights, we build a complete preventive plan for every child that protects their smile at every stage of development.
That plan combines fluoride treatments, sealants, regular cleanings, and diagnostic imaging into layered protection against decay and developmental problems.
Frequently Asked Questions
Are There Alternatives to Dental X-Rays
There are no alternatives to dental X-rays that provide the same level of diagnostic information. A visual exam can evaluate the surfaces of the teeth and gums but cannot see below the enamel surface, between teeth, or into the jawbone. Some dentists use transillumination (a bright light passed through the tooth) as a supplementary screening tool, but transillumination cannot replace the detailed structural information an X-ray provides. Dental radiographs remain the standard of care endorsed by the ADA and AAPD for a complete diagnostic evaluation.
Do Kids Really Need Dental X-Rays at Every Visit
Kids do not need dental X-rays at every visit. The ADA and AAPD both state that X-rays should be prescribed based on individual clinical need, not on a fixed schedule. Your child’s dentist evaluates risk factors, reviews previous images, and performs a clinical examination before deciding whether new X-rays are warranted. Low-risk children with no history of cavities may go 12 to 24 months between X-ray sets. High-risk children may need imaging every 6 to 12 months.
Can Dental X-Rays Show If a Child Needs Braces
Dental X-rays can show conditions that indicate a child may need braces. A panoramic radiograph reveals the position of developing permanent teeth, the alignment of the jaws, and whether teeth are crowded, impacted, or erupting at abnormal angles. This information helps the dentist or orthodontist determine the right timing for orthodontic evaluation. The AAPD recommends that children receive an orthodontic screening by age 7.
How Long Does a Dental X-Ray Take
A dental X-ray takes just a few seconds per image. A single bitewing X-ray is captured in less than one second once the sensor is positioned. A full set of four bitewing radiographs typically takes under two minutes from the first image to the last. A panoramic X-ray takes approximately 15 to 20 seconds as the machine rotates around the child’s head. The entire imaging process, including sensor placement and lead apron application, adds only a few minutes to your child’s appointment.
Is It Safe for a Child to Get Dental X-Rays While Sick
It is generally safe for a child to get dental X-rays while sick, but the decision depends on the type of illness and how the child is feeling. A child with a mild cold can typically proceed with X-rays without any issue. A child who is actively vomiting, has a severe sore throat, or is unable to sit still comfortably may be better served by rescheduling the imaging to a visit when they are feeling well. Your child’s dentist will make this determination based on the child’s condition at the time of the appointment.
What Is the Image Gently Campaign
The Image Gently campaign is a coalition of more than 80 health care organizations, including the ADA, dedicated to promoting safe pediatric imaging practices worldwide. The campaign encourages dental and medical providers to use the lowest radiation dose necessary for each child, to avoid unnecessary imaging, and to use child-sized equipment and settings rather than adult protocols. Image Gently reinforces the ALARA principle and provides educational resources for both providers and parents.
The Takeaway
Dental X-rays are a safe, low-radiation, and essential part of pediatric dental care. They reveal cavities, infections, developmental abnormalities, and jaw conditions that a visual exam alone cannot detect. Digital X-ray technology has reduced radiation exposure by 80 to 90% compared to traditional film, and protective measures like lead aprons, thyroid collars, and rectangular collimation add multiple layers of safety. Your child’s X-ray schedule is based on their individual risk factors, not a one-size-fits-all formula, and every image is taken with a specific clinical purpose in mind.
If you have questions about your child’s dental X-rays or are ready to schedule a preventive care visit, contact Cohen Family Smiles at 914-245-2965. We serve families in Yorktown Heights and the surrounding communities with gentle, expert pediatric dental care and the latest digital imaging technology.
