How Safe Is Dental X-Ray During Pregnancy — and Where Is the Line Between Justified Caution and Evidence-Free Refusal?

What Is Better: Actual Radiation Dose or Perceived Risk?

One of the most common questions patients ask about this topic concerns actual radiation dose vs. perceived risk. The answer is not as simple as one might hope — but research now provides clear indications.

The systematic review by Gamba et al. (2024) analyzed seven studies, including three retrospective investigations of pregnant women and four phantom studies. None of the included studies measured a uterine dose above 0.01 mGy for single intraoral exposures. These values are several orders of magnitude below the teratogenic threshold of 50–100 mGy, which is considered the lower limit for deterministic damage in radiation biology.

Flagler et al. (2022) document in their narrative review the historical decline in radiation exposure over six decades. The transition from D-speed to F-speed films reduced exposure by approximately 60%, and the introduction of digital sensors further lowered the dose. A single digital periapical image currently delivers an effective dose of approximately 5 µSv, which corresponds to less than one day of natural background radiation.

The phantom studies in the review by Gamba et al. (2024) show that even for panoramic radiographs, the fetal dose remains in the range of 0.001–0.01 mGy. For cone beam computed tomography (CBCT), estimated uterine doses are higher but remain well below 0.1 mGy. These data support the position that no clinically used dental imaging procedure comes anywhere near the teratogenic threshold.

The perceived danger is in clear disproportion to the actual exposure. Flagler et al. (2022) report that fewer than half of all pregnant women in the US receive dental care, with radiation fear cited as one of the central reasons. At the same time, epidemiological data show that untreated dental infections during pregnancy are associated with an increased risk of premature birth and low birth weight.

Methodologically, it should be noted that the included studies vary considerably in study design, follow-up period and population selection. This heterogeneity limits the comparability of results and explains why pooled effect estimates must be interpreted with caution. Nevertheless, the direction of the effect is consistent across different study types.

For applicability to the care context, it is additionally relevant that a significant portion of the scientific evidence comes from Anglo-American or Scandinavian healthcare systems. Differences in reimbursement structures, treatment culture and patient access can influence effect sizes without invalidating the core message.

For clinical practice, a clear course of action emerges: Urgent diagnostic imaging can be performed at any stage of pregnancy with appropriate radiation protection. The absolute fetal dose from a single dental image is in the range of a few microsieverts, far below any clinically relevant threshold.

The distinction between elective and urgent imaging remains the operational core. Routine status images or panoramic radiographs without an acute clinical question should preferably be performed postpartum. In cases of acute symptoms, suspected abscess, or necessary treatment planning, pregnancy must not be an obstacle to diagnostics.

In everyday practice, this means: The scientific evidence does not provide a one-size-fits-all answer, but a framework for individualized decisions. Patient-specific factors such as general health, compliance, individual risk profiles and treatment preferences must be incorporated into the decision.

What does this mean for you? The article must make the dose reality transparent.

In everyday life, you may encounter this topic more often than you think. The important thing is: not every report you find in the media or on the internet accurately reflects the state of research. Studies show a more nuanced picture than sweeping headlines suggest.

Science has intensively investigated this topic in recent years. Several scientific papers contribute to the current assessment. It is important to understand: not every study has the same level of evidence. Large, well-controlled studies produce more reliable results than small observational studies. The overall view of these various studies gives the picture we present to you here.

What Does "Clinical Indication During Pregnancy" Mean for Me as a Patient?

When it comes to clinical indication during pregnancy, the research is clearer than many think. Here you will learn what current studies actually show.

Brouwer et al. (2016) conducted a systematic review summarizing multiple studies on the accuracy of various detection methods for secondary caries. From 1,179 screened studies, 23 were included. Visual inspection (n = 11 studies), radiography (n = 13) and laser fluorescence (n = 8) showed comparable sensitivities in the range of 0.50 to 0.59 and specificities of 0.78 to 0.83.

Tactile examination (n = 7 studies) proved to be unreliable. Quantitative light-induced fluorescence (n = 3) showed higher sensitivity on non-proximal surfaces but low specificities. The results suggest that no single method is sufficient as the sole diagnostic standard and that the combination of multiple methods increases accuracy.

Gamba et al. (2024) emphasize in their review that the decision for imaging during pregnancy should be made not based on radiation dose alone, but based on the diagnostic added value. Radiographic diagnostics remain an indispensable component of dental assessment, whose benefit outweighs the marginal risk in cases of acute symptoms.

The evidence consistently shows that radiography on proximal surfaces is the most reliable complement to visual inspection. Brouwer et al. (2016) found that visual and laser fluorescence methods show advantages on non-proximal surfaces and with composite materials, while radiography makes its strongest diagnostic contribution for approximal caries adjacent to amalgam restorations.

Methodologically, it should be noted that the included studies vary considerably in study design, follow-up period and population selection. This heterogeneity limits the comparability of results and explains why pooled effect estimates must be interpreted with caution. Nevertheless, the direction of the effect is consistent across different study types.

For applicability to the care context, it is additionally relevant that a significant portion of the scientific evidence comes from Anglo-American or Scandinavian healthcare systems. Differences in reimbursement structures, treatment culture and patient access can influence effect sizes without invalidating the core message.

In practice, this means: when radiographic diagnostics are clinically indicated, they should also be performed during pregnancy. The diagnostic quality of the image is not changed by pregnancy, and the information gained can be crucial for treatment planning.

The combination of visual inspection and targeted radiography remains the pragmatic gold standard. During pregnancy, the indication should be set with particular care — which means focused application, not refusal.

In everyday practice, this means: the scientific evidence does not provide a one-size-fits-all answer, but a framework for individualized decisions. Patient-specific factors such as general health, compliance, individual risk profiles and treatment preferences must be incorporated into the decision.

What does this mean for you? The decision must distinguish between elective and urgent.

In everyday life, you may encounter this topic more often than you think. The important thing is: not every report you find in the media or on the internet accurately reflects the state of research. Studies show a more nuanced picture than sweeping headlines suggest.

How do scientists arrive at these statements? They do not evaluate just one study, but look at many investigations simultaneously. This allows them to recognize whether a result was coincidental or whether it is repeatedly confirmed. In this case, the findings are based on 4 scientific papers from different countries and research groups.

What Does "Patient Communication and Anxiety Management" Mean for Me as a Patient?

One point that often causes confusion is patient communication and anxiety management. But science has made important advances in recent years.

What does research say? Good education about the actual dose size reduces anxiety and prevents diagnostic delays.

Where are there still open questions? The optimal communication strategy has not been systematically studied.

In everyday life, you may encounter this topic more often than you think. The important thing is: not every report you find in the media or on the internet accurately reflects the state of research. Studies show a more nuanced picture than sweeping headlines suggest.

What makes these results reliable? In medical research, the rule is: the more independent studies arrive at the same result, the more certain the statement. The type of study and the number of participants also play an important role. Large controlled studies with many participants provide more reliable results than small surveys.