The core message is clear: in dental care, moderation and careful judgment in the use of imaging techniques are essential for safeguarding both patients and practitioners. But here’s where it gets controversial: how strictly should these guidelines be followed, and is there a risk of under-diagnosis if imaging is overly restricted?
Recently, the American Dental Association (ADA) released updated guidance emphasizing that dental imaging should be employed solely when necessary from a clinical perspective. This shift aims to reduce unnecessary radiation exposure for patients and dental staff, aligning with the fundamental principle that radiation should be used judiciously in all medical and dental practices.
Published simultaneously in the January 2026 issue of The Journal of the American Dental Association and online ahead of print in Oral Surgery, Oral Medicine, Oral Pathology, and Oral Radiology, these guidelines mark the first major update in over ten years concerning patient selection for radiographic examinations. They notably encompass both traditional planar dental radiography and advanced cone-beam computed tomography (CBCT), reflecting a comprehensive approach to modern dental diagnostics.
The guidelines focus on several specific clinical scenarios, expanding upon recommendations made in 2012. A key emphasis is placed on conducting a thorough clinical examination before ordering any imaging. This step is crucial to determine whether radiographs will actually support diagnosis, treatment planning, or overall patient management based on individual needs, rather than ordering images out of routine or habit.
Erika Benavides, D.D.S., Ph.D., who led the panel and is a professor at the University of Michigan School of Dentistry, underscores this point: “Dental imaging is a vital diagnostic resource that can significantly improve outcomes when used properly. Just as you wouldn’t get an X-ray for another body part without a clear reason, dental X-rays should follow a careful initial examination, including a review of medical and dental histories and existing X-ray records.”
These new recommendations, developed by an expert panel appointed by the ADA's Council on Scientific Affairs and endorsed by the American Academy of Oral and Maxillofacial Radiology, aim to set a high standard for responsible imaging utilization.
Trishul Allareddy from the University of North Carolina emphasizes that these updates reflect a blend of accumulated knowledge and practical experience, providing a clear pathway for clinicians to serve patients effectively while limiting unnecessary radiation exposure.
Specific guidance is offered for detecting cavities, with tailored recommendations for different surfaces—such as anterior and posterior proximal, occlusal, root, and smooth surfaces. The choice between bitewing and periapical radiographs should be determined by clinical judgment, especially considering the location of suspected lesions and the anatomy of the patient.
In managing periodontal disease, radiographic evaluation remains an essential part of diagnosis and establishing a baseline. The guidelines recommend using a 2D full-mouth series alongside clinical exams as the standard approach. Interestingly, current evidence does not support routine use of CBCT for periodontal issues unless in complex cases where detailed planning is required.
The guidance framework also details how to tailor imaging to different patient appointments, differentiating between initial evaluations and follow-up visits. It categorizes recommendations based on age, dental development stage, and risk factors such as cavities or gum disease.
Various specialties, including endodontics, orthodontics, and maxillofacial surgery, are addressed with specific instructions. For instance, panoramic radiographs are recommended for monitoring tooth eruption before orthodontic work or assessing root positioning during treatment. For young patients, radiation doses should be minimized through careful prescription practices.
In cases involving third molars or supernumerary teeth, panoramic X-rays are suggested for initial assessment. When diagnosing temporomandibular joint disorders (TMD), panoramic imaging can be useful early on to identify major structural abnormalities, but it is not sufficient for definitive diagnosis due to its low sensitivity.
For dental implants, panoramic radiographs are recommended at the initial stage, while CBCT should be reserved for detailed planning of implant placement. Conventional intraoral 2D images are preferred for initial root canal evaluations, with CBCT only used subsequently if necessary—always with the smallest field of view to limit radiation.
This publication is the second part of a two-piece series focused on optimizing diagnostic imaging in dentistry. The first, released in early 2024, centered on radiation safety and regulatory measures, notably recommending against routine thyroid and abdominal shielding, highlighting a move toward evidence-based, minimal-impact practices.
Dr. Benavides balances reassurance with caution: “Dental X-rays are very safe. Often, a single X-ray exposes patients to less radiation than what they naturally receive in just one day from the environment. Still, it’s crucial to follow the ALARA principle—keeping radiation ‘As Low As Reasonably Achievable’—and only order X-rays when it genuinely benefits patient care.”
The ADA encourages dental professionals and their teams to review these new guidelines and engage openly with patients concerning the necessity and safety of imaging procedures. After all, balancing precise diagnostics with patient safety remains a fundamental challenge—and sometimes a point of debate—within modern dentistry. Do you agree that stricter adherence to these recommendations could risk missing early diagnoses, or do you believe they strike the right balance? Share your thoughts below!
