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Tropical Dental Journal - 1st Pan African international dental journal


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Published in English in Tropical Dental Journal Volume 35 - December 2012 pages 21-30

Three-dimensional assessment of facial bone cavities in class I occlusion with normodivergent skeletal patternThree-dimensional assessment of facial bone cavities in class I occlusion with normodivergent skeletal pattern est évalué 1 étoiles par les abonnés Tropical Dental Journal Online

Article Open access

Authors : J.V. Ghoubril, F.M. Abou Obeid - Lebanon


Résumé

Introduction : L’objectif de cette étude est de définir un protocole de mesure des volumes faciaux à partir d’une acquisition tomodensitométrique tridimensionnelle chez des sujets normo-divergents en classe I squelettique et en classe I d’Angle, de quantifier la normalité volumique et de trouver un concept de normalité individuelle de ces cavités.
Matériels et méthodes : L’échantillon d’étude comporte 60 sujets. Il est composé, à égalité, de 30 garçons et 30 filles. A partir des coordonnées cartésiennes des repères anatomiques sélectionnés sur les coupes natives et grâce aux logiciels de la GammeCépha®, on a pu calculer les volumes des différentes cavités.
Résultats : Le rapport des différents volumes par rapport au volume total est de 16,91% chez l’homme et 18,11% chez la femme pour les cavités orbitaires, 37,55% chez l’homme et 37,31% chez la femme pour la cavité éthmoïdo-nasale et 45,53% chez l’homme et 44,56% chez la femme pour la cavité buccale.
Conclusion : Cette nouvelle méthode mensuratrice tridimensionnelle des différents volumes des cavités osseuses de la face constitue une nouvelle approche de la biométrie 3D. A notre connaissance, les critères de normalité choisis dans cette étude, qui n’ont pas été défini jusqu’à présent, nous ont permis d’établir des normes volumiques des cavités faciales. Cela permettra l’identification des personnes par rapport à un volume normal de référence, et de définir un équilibre individuel des volumes faciaux.

Abstract
Three-dimensional assessment of facial bone cavities in class I occlusion with normodivergent skeletal pattern

Introduction: The aims of our study are to measure the volume of the facial cavities based on a three-dimensional tomodensitometric acquisition in normodivergent, skeletal and dental Class I subjects; to quantify volumetric normality and generate an individual normality concept of these cavities.
Material and methods: The study was performed on a sample of 60 subjects equally divided between both genders. Based on the X, Y, Z coordinates of the anatomic landmarks and structural contours selected on the native slices and with the help of the GammaCepha® software, we were able to compute the volume of the different cavities.
Results: The ratio of the different volumes compared to the total volume is 20.9% for males, 19.1% for females in maxillary sinuses ; 13.4% for males, 14.7% for females in orbital cavities; 29.7% for males, 30.2% for females in ethmoido-nasal cavity and 36% for males, 36% for females in oral cavity.
Conclusion: This new method of calculating volumes of the different facial cavities is an original approach to three-dimensional biometrics. To our knowledge, the criteria of normality chosen in this study, which have not been defined until present, have allowed us to establish standards of volumetric facial cavities. This will allow identifying individuals in comparison to a normal volume reference, and define an individual balance regarding facial volumes.

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