Are dental X-rays safe? For most people, yes: the radiation from dental imaging is low, and dentists are trained to use as little as they can while still getting a useful picture. The real question is whether each image is needed, and that depends on your own risk, not a calendar. This guide explains the main types, how often they tend to be taken, and what changes if you are pregnant or asking for your child.
Dental offices work by a principle called ALARA, short for "as low as reasonably achievable." In plain terms: don't take an image unless it will change a decision, and when you do take one, use the smallest exposure that still shows what the dentist needs to see.
Modern equipment helps with that. Digital sensors need less exposure than old film did, the beam is narrowed to the area being imaged, and each exposure lasts a fraction of a second. Small, targeted images of a few teeth involve far less than a medical CT of the head.
Protective measures are used as appropriate for each patient. Professional guidance on shielding has shifted over the years, with more emphasis on a tightly focused beam and fast digital sensors, so practices vary in when they use a lead apron or collar. If a shield would make you more comfortable, just ask.
Not every X-ray answers the same question. Knowing which one is being taken, and why, makes it easier to ask good questions.
| Type | What it shows | Typical reason |
|---|---|---|
| Bitewings | The crowns of upper and lower back teeth together, and the bone level between them | Spotting decay between teeth and early bone loss from gum disease |
| Periapical | One or two whole teeth, from the biting edge to the tip of the root | A toothache, a suspected abscess, or checking a root canal |
| Panoramic | Both jaws, all teeth, the jaw joints and the sinuses in one wide image | Wisdom teeth, teeth that haven't come in, an overview before larger treatment |
| CBCT (3D) | A three-dimensional view of bone, nerves and sinuses | Implant planning and complex roots or impacted teeth |
Bitewings are the workhorse, because cavities that form where two teeth touch are invisible to the eye. Our post on cavities between teeth shows why. A CBCT scan is used far less often, only when the treatment calls for 3D detail; CBCT scans vs regular X-rays explains the difference.
There is no single schedule that suits everyone. Following ADA guidance, a dentist sets the interval from your history and what the exam shows. Two adults the same age can have very different needs:
One simple way to avoid repeat exposure: if you are changing dentists, ask your previous office to send your most recent X-rays. If they are recent and clear enough, a new dentist can often use them instead of retaking everything. That is also a good habit for anyone moving to Miami from another city or country.
Tell the dentist if you are pregnant or might be, even early on. Routine check-up images are often postponed until after the baby arrives, simply because they can wait.
Necessary X-rays are a different matter. If you have a toothache, swelling or an infection, an image may be needed to diagnose it, and dental X-rays can be taken during pregnancy with appropriate precautions. Leaving a dental infection untreated is generally considered a bigger concern than a small, targeted image of the mouth. Your dentist can also talk with your obstetric provider if you or they have questions.
Pregnancy is also a good time for a cleaning and an exam, since hormone changes can make gums puffy and prone to bleeding.
Children are more sensitive to radiation than adults, so dentists are especially selective with them. Many young children with healthy teeth and spaces between their baby teeth need few or no X-rays at first. Once the back baby teeth touch, bitewings become useful, because decay can spread quickly in thin baby-tooth enamel.
Other reasons to image a child include an injury to a front tooth, a baby tooth that won't loosen, or checking that adult teeth are developing where they should. Child-sized sensors are used. If your child has had X-rays elsewhere recently, bring the details. Our kids' dentist page explains how visits for younger patients work.
You are entitled to understand any image before it is taken. Reasonable questions include: which type is this, what are you looking for, and could my old X-rays answer that instead? A good dentist will answer without hesitation.
At Prana Dental, Dr. Rana decides on X-rays after the exam, based on your history and symptoms, and explains the reason first. X-rays are not part of the first visit, which is an exam, a 3D scan and a smile preview. That 3D scan is taken with a small handheld wand that uses light, not radiation. When images are needed, they are a separate step and their cost is confirmed in writing beforehand. Our general dentistry page shows how imaging fits into routine care.
Dr. Aakash Rana, DDS is a general dentist trained at NYU College of Dentistry, with more than $100,000 in continuing education. He plans and treats each case at Prana Dental himself, works with our in-house lab, and refers to a specialist when a case needs one.
It depends on your risk. Adults with healthy teeth and gums and no recent cavities usually need them less often, while people with frequent cavities, gum disease or ongoing treatment may need them more often. Your dentist should explain the interval they suggest and why.
Yes, you can decline. Your dentist should explain what they may miss without the images, such as decay between teeth or an infection at a root tip, and may ask you to sign a note that you declined. Some treatments, like a root canal or an implant, can't be done safely without imaging.
X-rays needed to diagnose a dental problem can be taken during pregnancy with appropriate precautions. Routine images are often postponed until after delivery. Always tell your dentist if you are pregnant or might be.
A new dentist needs a current picture to diagnose accurately, and older images may be out of date or unclear. Ask your previous office to send your most recent X-rays. If they are recent and of good quality, they can often be used instead of retaking them.
No. An intraoral scan uses light to record the surface of your teeth and gums, so it involves no radiation. It can't see inside teeth or bone, which is why X-rays are still needed for some diagnoses.
Call or text (786) 579-0521 and ask before your visit. Prana Dental is open now on Biscayne Blvd in Edgewater, Monday to Saturday, 8am to 8pm.