[Prospective studies on patients, dentists, dental staff and dental cost].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003813:Dentistry / Q000639:trends*; D004468:Economics, Dental; D005260:Female; D006801:Humans; D007223:Infant; D007564:Japan; D008297:Male; D008875:Middle Aged; D010361:Patients; D013997:Time Factors; D014076:Tooth Diseases / Q000453:epidemiology