Reuters (10/31, Rapaport) reported in continuing coverage that a study by researchers at Kyoto University in Japan found young children living in households with smokers were more likely to develop caries. The study found that children living with smokers were more than twice as likely to develop dental caries at three years of age than those who lived in non-smoking households. American Dental Association spokesperson Jonathan Shenkin said the study adds to the evidence that there is an association between secondhand smoke exposure and caries development in children.