You probably don't need dental X-rays every year
from The New York Times
Adults without apparent dental problems do not need dental X-rays of any kind every year, the ADA says. Adults who properly care for their teeth and have no symptoms of oral disease or cavities can go two to three years between bitewing X-rays, according to the ADA. Adults with a high risk of cavities (like those with a history of them) should receive them at least every 18 months, and possibly more frequently, depending on the condition of teeth and gums.
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