A new model of classification of third molars development and its correlation with chronological age in a Brazilian subpopulation

Autor: Christiano Oliveira-Santos, Francisco Carlos Groppo, F Nogueira-Reis, Anne Caroline Costa Oenning, Nicolly Oliveira-Santos, Eduarda Helena Leandro Nascimento, Hugo Gaêta-Araujo
Rok vydání: 2020
Předmět:
Zdroj: International Journal of Legal Medicine. 135:639-648
ISSN: 1437-1596
0937-9827
Popis: The present study correlated the mineralization of third molars to chronological age using a modified classification based on Demirjian’s stages in a Brazilian subpopulation and compared with the original classification. A total of 1082 patients with age ranging from 6 to 26 years were included in the sample, with at least one third molar on panoramic radiographs. The third molars were classified according to the original Demirjian classification (8 stages) and a new model based on the Demirjian method, where the original stages were grouped into four stages: AB—enamel mineralization; CD—crown dentin mineralization; EFG—root formation; and H—complete development. Statistical analyses were performed by Kruskal-Wallis/Dunn tests (α = 0.05) and the multinomial logistic regression model. Data were analyzed according to percentiles for the probability of an individual being over 18 years old. The mean ages of the stages in both classifications did not present a significant difference between superior and inferior arches (p
Databáze: OpenAIRE
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