The 2026 ADA X-Ray Guidance Update: What Changed, and What California Law Still Requires

In January 2026, the American Dental Association released its first major update to dental imaging guidance in more than a decade. The update reflects how modern digital X-ray equipment actually works and is meant to help dentists order fewer, better-targeted images — not to loosen safety practices. One important note up front: while the ADA's updated guidance says routine lead aprons and thyroid collars are no longer necessary from a national radiation-safety standpoint, California law has not changed to match. Dental offices in California, including Carlmont Dental Care, are currently still required to use protective apron shielding on every patient. More on that below.

What Actually Changed in the 2026 Guidelines

The ADA's updated recommendations are notable for two reasons. First, they're the first update since 2012, and they now cover both traditional 2-D X-rays and 3-D cone-beam CT (CBCT) imaging in one framework. Second, they formalize guidance first issued in 2024 by an ADA-convened expert panel — the ADA's Council on Scientific Affairs, publishing in the Journal of the American Dental Association — which concluded that thyroid collars and abdominal lead aprons are no longer necessary for radiation safety with modern equipment, regardless of patient age or pregnancy status.

The reasoning comes down to how far imaging technology has advanced. Digital sensors require a fraction of the radiation older film systems needed, and rectangular collimation — a technique that narrows the X-ray beam to just the area being imaged — already limits scatter to the rest of the body far more precisely than a lead drape ever could. In practice, a lead apron or thyroid collar can actually get in the way of the beam, producing a blurred or incomplete image. When that happens, the X-ray has to be retaken, which means the patient ends up with more radiation exposure, not less. According to the ADA's review, removing shielding can, paradoxically, reduce total exposure over a visit.

California Law Still Requires Shielding

The ADA's updated recommendation is a national guideline, not a change in California law. Under California Code of Regulations, Title 17, dental offices in the state are currently required to drape patients — including pregnant patients — with a protective apron of at least 0.25mm lead-equivalent thickness covering the gonadal area during dental X-rays, regardless of the ADA's updated national guidance. This requirement is enforced by the California Department of Public Health's Radiologic Health Branch and has not been revised to reflect the ADA's January 2026 update.

Carlmont Dental Care follows California's shielding requirement for every patient who receives a dental X-ray. What we have adopted from the ADA's updated guidance is its direction on reducing unnecessary X-ray frequency and using CBCT more selectively — ordering imaging based on clinical need rather than a fixed schedule, and reserving CBCT for situations where it's genuinely needed. If California's shielding requirement changes in the future, we'll update our approach accordingly and let patients know.

Fewer X-Rays, Ordered With More Intention

The bigger shift in the guidelines isn't about shielding at all — it's about when X-rays get ordered in the first place. Rather than defaulting to X-rays on a fixed schedule (like "every six months" or "every new patient exam"), the ADA now recommends that imaging be based on clinical need: your dentist's exam findings, your health history, and your prior images should all inform whether new X-rays add useful information. If nothing has changed since your last visit and there's no clinical reason to look deeper, that visit might not include X-rays at all.

At Carlmont Dental Care, this is close to how our team already approaches imaging — we've never believed in X-raying everyone on the same calendar regardless of what's going on in their mouth. The updated ADA framework gives that judgment-based approach a formal, evidence-backed structure, particularly for patients in Belmont and across San Mateo County who see us for routine cleanings and exams year after year.

What This Means for 3-D Imaging (CBCT)

Cone-beam CT scans give a detailed 3-D view and are genuinely useful for planning dental implants, evaluating impacted teeth, or investigating suspected infection or trauma that 2-D X-rays can't fully explain. But the new guidelines are clear that CBCT is not meant to be a routine screening tool. It isn't indicated for catching cavities, and it isn't the default for routine gum disease monitoring or general TMJ complaints — a standard panoramic X-ray is the appropriate first step for those, with CBCT reserved for cases where more detail is genuinely needed to plan treatment. When CBCT is indicated, the guidelines call for using the smallest field of view that still answers the clinical question, essentially zooming in only as far as necessary rather than capturing more anatomy than the situation calls for.

Is This Actually Safer?

It's a fair question. The evidence the ADA reviewed nationally points to modern beam collimation and digital sensors doing much of the protective work that shielding used to do, with the added benefit of avoiding retakes caused by a shield blocking part of the image. That said, California's current shielding requirement stands independent of this question, and Carlmont Dental Care continues to provide apron shielding on every X-ray, as state law requires. For pregnant patients specifically, both the ADA and the American College of Obstetricians and Gynecologists have stated that necessary dental X-rays are safe to take at any stage of pregnancy, and that leaving a dental infection untreated typically carries more risk than a properly ordered, properly shielded X-ray. Every patient's situation is individual, and if you have specific concerns — pregnancy or otherwise — it's always reasonable to talk them through with your dentist at Carlmont Dental Care before any imaging is taken.

Common Questions About the New X-Ray Guidelines

Q: Does Carlmont Dental Care still use a lead apron during X-rays?

Yes. California state regulations (Title 17 CCR) currently require apron shielding for every dental X-ray patient, and we follow that requirement for all patients, including during pregnancy. The ADA's updated 2026 guidance changes national recommendations on X-ray frequency and CBCT use — it does not change California's shielding requirement.

Q: Does this mean my dentist will take fewer X-rays than before?

Likely yes, for many patients. Imaging is now guided by clinical findings and history rather than a routine schedule, so if there's no indication that new information is needed, X-rays may be skipped at a given visit.

Q: Is CBCT ever used for routine cleanings or checkups?

No. CBCT is reserved for specific situations like implant planning, evaluating impacted teeth, or investigating findings that 2-D X-rays can't fully explain — not for routine screening.

Q: I'm pregnant. Should I still get dental X-rays if my dentist recommends them?

Necessary dental X-rays are generally considered safe throughout pregnancy, and California law requires apron shielding to be used for every patient, including during pregnancy. Untreated dental problems can pose more risk than properly shielded imaging. Still, this is worth discussing individually with your dentist at Carlmont Dental Care so you understand exactly why an X-ray is being recommended.

Q: Where can I read more about how Carlmont Dental Care approaches imaging?

Call our Belmont office at (650) 591-1984, and our team can walk you through how we apply these updated guidelines, and California's shielding requirement, at your next visit.

Questions About Your Next Visit?

If you're due for a checkup or just curious about how these updated imaging guidelines apply to your care, our team at Carlmont Dental Care in Belmont is happy to talk it through. Call us at (650) 591-1984 or visit carlmontdentalcare.com to schedule a consultation.