Any exposure to radiation has risks, but dental X-rays, according to sources cited in the New York Times article, account for less than 3 percent of the medical radiation the average person receives. Digital dental X-rays also use low-dose radiation, compared with other widely employed medical imaging devices such as cone-beam CT scans.

There is some evidence that regular X-rays via dental x-ray machine can contribute to meningiomas, tumors that are typically noncancerous but can cause problems as they grow. Research indicates that women face a higher risk for meningiomas, and a 1985 study suggests that the presence of meningiomas may be explained in part by excessive exposure to dental X-rays beginning at a young age.

More recently, the findings of a 2012 study link dental X-rays with an increased risk for meningiomas; that research implies the earlier people receive their first X-ray, the greater their chance for developing meningiomas. However, as an Economist article on that study states, the risk for developing these tumors from dental X-rays is small (the actual number is not known because not all meningiomas are caused by X-rays or radiation, but the article observes that in developed nations, meningiomas may affect between 5 and 10 of every 200,000 people).

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