title: New systems for dental maturity based on seven and four teeth.
abstract: An updated system for estimating dental maturity is presented. It extends the original system (Demirjian et al., 1973) based on radiographs of 7 teeth by including two extra stages, and by enlarging the standardizing sample to include 2407 boys and 2349 girls. Percentile standards from ages 2-5 to 17-0 years are presented separately for boys and girls. Scoring systems and percentile standards are presented for two different sets of 4 teeth and a comparison of all three systems is made. It is suggested that these systems may measure somewhat different aspects of dental maturity.
mesh_terms: D000293:Adolescent; D000366:Age Determination by Teeth; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D014070:Tooth / Q000000981:diagnostic imaging