Children breastfed for two years or longer were more likely to have dental cavities, according to research in the just-published journal, Pediatrics.
At age 5, the children were examined by dentists who checked for tooth decay, missing teeth and minor and severe cavities.
Karen Peres, an associate professor at the University of Adelaide in Australia.
But the debate about how long is too long to breastfeed is an ongoing one.
Ruchi Sahota, a dentist and spokeswoman for the American Dental Association, told CNN.