Clinical absence of the first and second permanent molars.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar; D012737:Sex Factors; D014078:Tooth Eruption; D014095:Tooth, Impacted / Q000453:epidemiology; D014097:Tooth, Unerupted