A recent study published in ‘Cancer’, a scientific journal of the American Cancer Society, associates yearly or more frequent dental X-rays with an increased risk of developing meningioma, the most commonly diagnosed brain tumor in the United States.
The study included 1,433 patients with a diagnosis of intracranial meningioma and a control group of 1.350 individuals. Study participants ‘self-reported’ having a history of bitewing, full-mouth, and/or panorex dental X-rays.
A neurosurgeon and lead author of the study, Dr. Elizabeth Claus, stated in an interview with CBS News, “This research suggests that although dental X-rays are an important tool in maintaining good oral health, efforts to moderate exposure to this form of imaging may be of benefit to some patients’.
The ADA Division of Science has carefully reviewed the study and notes some weaknesses in not only the design, but also the interpretation of the results.
1. The findings are based on patient recall of X-rays taken years ago and people’s memories can be inconsistent. In some cases, the patients were asked to remember the type and frequency of dental X-rays taken when they were 10 years old…..or….younger.
2. Advances in X-ray technology-equipment improvements, faster film speeds and digital imaging-have successfully reduced radiation exposure.
3. The study was observational, meaning it cannot establish a cause-and-effect relationship between dental X-rays and meningioma.
4. The results of the study did not appear to be dose-related as would be expected.
So….let’s talk about what we do here at Richard L Rogers, DDS, to make your necessary X-rays safe.
1. We have always customized the X-ray part of the examination according to the needs of our patients. What this means is that we don’t set the time interval between X-rays based upon some arbitrary number but rather look at the decay history (and plaque control) of the individual.
2. We take X-rays when necessary for diagnosis and treatment and we do not use them as a ‘screening’ tool.
3. Our X-ray units are calibrated annually, by an independent company, to verify all settings are safe.
4. We have been a ‘digital’ practice for over 8 years. This means our X-rays use the lowest amount of radiation available with modern technology.
5. We ALWAYS use lead aprons with thyroid collars to control exposure to the patient.
What wasn’t discussed? The risks a patient takes when dental X-rays are necessary but they are not taken. This is something we see all too often when we do an examination on a patient who has not had a thorough dental evaluation in many years. There are numerous oral diseases that cannot be detected with just a visual or physical examination. Dental X-rays are used to find cavities between the teeth and under fillings, gum and bone diseases, infection under the gums, and some types of tumors. X-rays help us catch and treat these hidden problems at an early stage before more extensive and expensive dental treatment is needed.
What is the good thing about this study? It raises awareness that getting X-rays should not be taken lightly and should be done only when necessary. If you have more questions or concerns….please let us know at your next visit. We look forward to making sure all of our patients are comfortable with our philosophy of thorough and safe dental visits.
