X-rays use radiation to obtain the image, and large doses or extended exposure to radiation is harmful. Dental x-rays use 1 mREM (unit of measure for radiation) per exposure. The average American is exposed to 360 mREM per year from sources in their everyday lives. The amount of radiation an x-ray gives off is small and not considered dangerous.
Not if you take the proper precautions. Patients can receive up to 300 x-rays without being overexposed to the radiation to make x-ray images. Pregnant women and their unborn fetus should take extra precautions, but are not in serious danger. X-rays are not bad for your health unless used in excess.
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