Dental visits volume and interval since last visit: United States, 1978 and 1979.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003752:Dental Health Services / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D013997:Time Factors; D014481:United States