Damage stays from low-dose X-rays
(http://www.cnn.com/2003/HEALTH/04/01/health.xrays.reut/index.html)
"Low doses of X-rays such as those patients receive in the dentist's chair may do more long-lasting damage than higher doses, German scientists reported on Monday in a study that turns common wisdom on its head..."
"Low doses of X-rays such as those patients receive in the dentist's chair may do more long-lasting damage than higher doses, German scientists reported on Monday in a study that turns common wisdom on its head..."