In the media recently was news about a recent study that associates yearly or more frequent dental x-rays to an increased risk of developing meningioma, the most commonly diagnosed brain tumor. The ADA reviewed this study and noted that the results rely on the individuals’ memories of having dental x-rays taken years earlier. Studies have shown that the ability to recall information is often imperfect.
The results of studies that use this design can be unreliable because they are affected by what scientists call “recall bias.” Also, the study acknowledges that some of the subjects had received dental x-rays decades ago when radiation exposure was greater. Radiation rates were higher in the past due to the use of old x-ray technology and slower film speeds.
It is the goal of the dental profession and policy of the ADA that radiation exposure be as low as reasonably achievable yet still be diagnostic. Dental x-rays are valuable in helping dentists detect and treat oral health problems at an early stage. Many oral diseases can’t be detected on the basis of a visual and physical examination alone, and dental x-rays are valuable in providing information about a patient’s oral health such as early stage cavities, gum diseases, infections, or some types of tumors. How often dental x-rays should be taken depends on the patient’s oral health condition, age, risk for disease, and any signs and symptoms of oral disease that the patient might be experiencing.
It is recommended that patients talk with their dentists if they have questions about their dental treatment.