Secular trend in tooth eruption: a comparative study of Danish school children of 1913 and 1965.
D000293:Adolescent; D000367:Age Factors; D001641:Bicuspid; D002648:Child; D003481:Cuspid; D003718:Denmark; D005260:Female; D006801:Humans; D008297:Male; D008963:Molar; D044469:Racial Groups; D012111:Residence Characteristics; D012737:Sex Factors; D014078:Tooth Eruption