METHODS	Five thousand eight hundred and seven low-income 2 - to 4-year-olds were randomly assigned to 1 of 3 groups : ( 1 ) Group 1 ( n = 2,014 ) received postcards containing information on how to enroll in the Yakima County Access to Baby and Child Dentistry program ; ( 2 ) Group 2 ( n = 2,014 ) received the enrollment information as well as additional information on the availability of fluoride varnish and the need to visit the dentist by the age of 1-year-old ; and ( 3 ) Group 3 ( n = 1,779 ) did not receive postcards .\