1. National Institute of Dental and Craniofacial Research and Centers for Disease Control and Prevention National Health and Nutrition Examination Survey (NHANES 1999-2002) 2004 http://drc.hhs.gov/
2. Surveillance for dental caries, dental sealants, tooth retention, edentulism, and enamel fluorosis - United States, 1988-1994 and 1999-2002;Beltran-Aguilar;MMWR Surveill Summ.,2005
3. United States Department of Health and Human Services Healthy People 2020 2012 http://www.healthypeople.gov/2020/default.aspx
4. Guideline on periodicity of examination, preventive dental services, anticipatory guidance/counseling, and oral treatment for infants, children, and adolescents;American Academy of Pediatric Dentistry;Pediatr Dent.,2010