Dentists—and I have met a number of them in my moves around the country—always wanted a fresh set of X-rays, even if the only problem was a chip in the tip of a tooth. All I could think of was the X-ray machines every shoe store had offered in my youth, through which children were encouraged to peer at the bones of their feet while wiggling their toes. The fun ended in the 1970s, when these “fluoroscopes” were eventually banned as dangerous sources of radiation. So why should I routinely expose my mouth, which is much more cancer-prone than the feet, to high annual doses of roentgens? If there
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