More than 16 million U.S. children lack basic dental care each year .
25 percent of U.S. children ages 2-5 and half of those ages 12-15 have tooth decay.
33 percent of Americans skipped dental care or checkups because of costs in 2008.
25 percent of Americans 65 and older have lost all of their teeth.
4 percent to 12 percent of adults have advanced gum disease.