Home > Dental > Tooth Decay in Younger Kids Getting Worse Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Feb 26, 2008 by PCasamassimo, Views: 4221 Paul Casamassimo, DDS discusses tooth decay in younger children, and why it is getting worse. Including diet, and just as important what they drink. Flouride, which is present in tap water, is not in most bottled waters, and does help protect kids from tooth decay. 25% of kids now get cavities in their baby teeth. Paul Casamassimo, DDS. Cheif of Pediatric Dentistry, Nationwide Childrens Hospital. Ohio.