RESUMO
A total of 500 orthopantomographic X-rays of Mexican children and teenagers of either sex, aged 7-18, were studied in order to ascertain the development and calcification stages of their third molars, as well as the most frequent anomalies related with them. It was observed that the dental bud appears between ages nine and eleven, and that the third molar is absent in 32.4% of the population, with a predominance of females over males. It was also found that 7.4% of molars evidenced malposition during their early stages of development. In view of such findings, the authors consider that a diagnosis of oligodontia and malposition of the third molar, cannot be established before age 13.
Assuntos
Dente Serotino/crescimento & desenvolvimento , Odontogênese , Calcificação de Dente , Adolescente , Anodontia/epidemiologia , Criança , Feminino , Humanos , Masculino , Dente Serotino/diagnóstico por imagem , Radiografia Panorâmica , Germe de Dente/diagnóstico por imagem , Dente Impactado/diagnóstico por imagemRESUMO
Five hundred orthopantomograph radiographs of mexican children and adolescent from 7 to 18 tears old were reviewed in order to establish the third molar formation and calcification stages and the most frequent anomalies related to these teeth. We find that tooth bud presence is between 9 and 11 years; Third molar is absent in 32.4% of the population; 7.4% of the molars presented early formation stage malposition; Therefore oligodontia diagnosis and third molar malposition can not be done before 13 years of age.