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Chronologie et étiologie de la maturation macrostructurale des dents définitives

Abstract : Aim: The aim of this PhD is twice: (1) using, testing and estimating the quality of a dental age assessment method (Braga et al., online first) the best one to describe the macrostructural maturation of permanent teeth, (2) Testing with a questionnaire, specially devised for this study, the potential impact of biological and socioeconomic factors on dental age assessment. Material: 863 healthy children living in the south of France and aged 3.5 to 16 years, form our sample. For all these children, we collect their first orthopantomography and a questionnaire filed by their parents. Method: A new dental age assessment method, based on coding devised by Demirjian et al. (1973) and on Bayes theorem (1763), is presented. This method respects the originality of dental mineralization sequences (Bayes Dependent approach) and allows, thanks to the use of uniform prior probabilities, the comparison between the results made with one test sample according to two different reference samples. Results: This study confirms the impact of gender on dental age assessment; the girls are ahead from boys. When Bayes Dependent approach is used, geographic origin has no influence on dental age assessment. Nevertheless, it seems that geographic origin has an impact on dental mineralization sequences. Weight at birth, maternal child's age at birth, type of feeding, maternal smoke habits during pregnancy and age at first steps, have no influence on dental age assessment. The socioeconomic level impact is not significant. Nevertheless, the results for girls show a tendency: “poor” girls are delayed in dental age in comparison with “non poor” girls.
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Contributor : Yann Heuzé <>
Submitted on : Thursday, December 15, 2005 - 12:08:12 PM
Last modification on : Monday, November 16, 2020 - 10:32:03 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 4:30:05 PM


  • HAL Id : tel-00011208, version 1



Yann Heuzé. Chronologie et étiologie de la maturation macrostructurale des dents définitives. Anthropologie biologique. Université Sciences et Technologies - Bordeaux I, 2004. Français. ⟨tel-00011208⟩



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