X-rays are an essential part of a dental checkup. They peer into places no dental mirror could ever reach and draw a complete picture of a patient’s mouth. Dental x-rays are deemed safe, mainly because they’re not like the x-rays used to check your bones (more on that later). However, some parents are concerned about the level of radiation emitted by these devices. An adult can withstand up to 25 REMs before he or she starts feeling the effects. By comparison, a CT scan of your abdomen and pelvic area will use just 0.20 REMs. Can kids withstand the same amount of energy?
http://www.philly-dentist.com/dental-x-rays-for-kids-philadelphia-dentist-says-theyre-totally-safe/
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