How often do you really need dental X-rays?

Every six months like clockwork, Melissa O'Brien takes her two children, Alexandra and Evan, to the dentist for a cleaning. They're nearly perfect patients — Alexandra, 13, has no cavities, and Evan, 10, has had only one — but O'Brien suspects she may not be the dentist's favorite mom, because when the dentist suggests X-rays, O'Brien sometimes says no, and she can tell that doesn't sit well.

CNN

October 5, 2011