[ Corrélation entre la forme du visage, la forme de l’incisive centrale maxillaire et la forme de l’arcade maxillaire : Etude épidémiologique sur des étudiants Marocains ]
Volume 26, Issue 3, June 2019, Pages 720–731
Aicha Oubbaih1, Yasmina Cheikh2, Fadwa Sedki3, Zineb Bazzi4, Samira Bellemkhannate5, and Khadija Kaoun6
1 Médecin résidente, Service de prothèse adjointe, Centre Hospitalier Universitaire Ibn Rochd Casablanca, Morocco
2 Professeur agrégé, Faculté de médecine dentaire, Casablanca, Morocco
3 Médecin dentiste, Casablanca, Morocco
4 Médecin dentiste, Casablanca, Morocco
5 Professeur de l'enseignement supérieur, Faculté de médecine dentaire, Chef de service de prothèse adjointe au Centre Hospitalier Universitaire Ibn Rochd, Casablanca, Morocco
6 Professeur de l'enseignement supérieur, Chef de département de prothèse adjointe, Faculté de médecine dentaire, Casablanca, Morocco
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The face and maxillary arch forms have been suggested as aids that guide the choice of the maxillary central incisor form, in order to achieve an esthetic prosthesis when pre-extractionnal elements or dental reference are missing. The purpose of this study was to determine the validity of William’s geometric theory of tooth selection by studying the correlation between maxillary central incisor form and face form, and to determine whether the maxillary arch can be considered as guide for selection of the maxillary central incisor by studying the relationship between these two factors in a Moroccan population. One hundred and fourteen students comprising 30 males and 84 females whose ages ranged from 21 to 25 years studying in the fifth year at dental faculty of Casablanca were selected as a study subject. Standardized photographs of face, maxillary central incisor and cast of maxillary arches were taken for each subject and then the outlines of these three factors were digitally traced and superimposed by an experienced graphic designer using the "Photoshop C6S” software. The outlines were evaluated by 4 observers and the results were collected. A statistical analysis was subsequently realized using the "SPSS" software. The lowest level of correlation was between the face form and the maxillary central incisor form because it was identical only in 21.9% of subjects, the identical correlation was more pronounced between the maxillary arch form and the maxillary central incisor form (54.4%). The results of the study indicated that there was no highly defined relationship between the maxillary central incisor form and the face form which does not support the “law of harmony”. However, the maxillary arch form and the maxillary central incisor form were correlated, therefore we had concluded that the arch is a more accurate guide for selection of the maxillary central incisor form in complete denture fabrication or in complex anterior restorations.
Author Keywords: Maxillary arch form, maxillary central incisor tooth form, facial form, William’s geometric theory, tooth selection.
Volume 26, Issue 3, June 2019, Pages 720–731
Aicha Oubbaih1, Yasmina Cheikh2, Fadwa Sedki3, Zineb Bazzi4, Samira Bellemkhannate5, and Khadija Kaoun6
1 Médecin résidente, Service de prothèse adjointe, Centre Hospitalier Universitaire Ibn Rochd Casablanca, Morocco
2 Professeur agrégé, Faculté de médecine dentaire, Casablanca, Morocco
3 Médecin dentiste, Casablanca, Morocco
4 Médecin dentiste, Casablanca, Morocco
5 Professeur de l'enseignement supérieur, Faculté de médecine dentaire, Chef de service de prothèse adjointe au Centre Hospitalier Universitaire Ibn Rochd, Casablanca, Morocco
6 Professeur de l'enseignement supérieur, Chef de département de prothèse adjointe, Faculté de médecine dentaire, Casablanca, Morocco
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The face and maxillary arch forms have been suggested as aids that guide the choice of the maxillary central incisor form, in order to achieve an esthetic prosthesis when pre-extractionnal elements or dental reference are missing. The purpose of this study was to determine the validity of William’s geometric theory of tooth selection by studying the correlation between maxillary central incisor form and face form, and to determine whether the maxillary arch can be considered as guide for selection of the maxillary central incisor by studying the relationship between these two factors in a Moroccan population. One hundred and fourteen students comprising 30 males and 84 females whose ages ranged from 21 to 25 years studying in the fifth year at dental faculty of Casablanca were selected as a study subject. Standardized photographs of face, maxillary central incisor and cast of maxillary arches were taken for each subject and then the outlines of these three factors were digitally traced and superimposed by an experienced graphic designer using the "Photoshop C6S” software. The outlines were evaluated by 4 observers and the results were collected. A statistical analysis was subsequently realized using the "SPSS" software. The lowest level of correlation was between the face form and the maxillary central incisor form because it was identical only in 21.9% of subjects, the identical correlation was more pronounced between the maxillary arch form and the maxillary central incisor form (54.4%). The results of the study indicated that there was no highly defined relationship between the maxillary central incisor form and the face form which does not support the “law of harmony”. However, the maxillary arch form and the maxillary central incisor form were correlated, therefore we had concluded that the arch is a more accurate guide for selection of the maxillary central incisor form in complete denture fabrication or in complex anterior restorations.
Author Keywords: Maxillary arch form, maxillary central incisor tooth form, facial form, William’s geometric theory, tooth selection.
Abstract: (french)
Chez l'édenté total, la forme du visage et la forme de l’arcade maxillaire ont été considérées comme des éléments qui aident dans le choix de la forme des dents antérieures et plus précisément de l’incisive centrale maxillaire afin de réussir une réhabilitation prothétique esthétique en l’absence de référence dentaire. Objectifs : - Tester au sein d’un échantillon exclusivement marocain, la validité clinique de la loi de l’harmonie de Williams pour la sélection des dents artificielles, et ce en déterminant la corrélation existante entre la forme du visage et la forme de l’incisive centrale maxillaire. - Vérifier si la forme de l’arcade maxillaire peut être utilisée comme référence dans le choix de la forme de l’incisive centrale maxillaire. Matériel et méthodes : Une enquête a été menée sur 114 étudiants de la 5ème année de la FMDC, dont l’âge variait de 21 à 25 ans. Les photographies du visage, de l’incisive centrale maxillaire et du modèle de l’arcade maxillaire ont été prises pour chaque sujet, ensuite les tracés de contours de ces trois éléments ont été effectués et superposés par un expert sur le logiciel «Adobe Photoshop CS6», selon trois figures. Les figures ont été finalement évaluées par 4 examinateurs du service de prothèse adjointe et les résultats ont été rapportés sur une fiche d’exploitation. Une analyse statistique a été réalisée par la suite en utilisant le logiciel «SPSS». Résultats : Le plus bas niveau de corrélation était entre la forme du visage et celle de l’incisive centrale maxillaire car elle n’était identique que chez 21,9% des sujets, la corrélation identique était plus marquée entre la forme de l’arcade maxillaire et celle de l’incisive centrale maxillaire (54,4%). Discussion et conclusion: Notre étude rapporte qu'il n'y a pas de relation hautement définie entre la forme de l’incisive centrale maxillaire et la forme du visage invalidant ainsi «la loi de l’harmonie». Cependant la forme de l’arcade et celle de l’incisive centrale maxillaire étaient corrélées, par conséquent on a conclu que l’arcade peut être utilisée comme référence dans le choix de la forme de l’incisive centrale maxillaire lors des réhabilitations prothétiques.
Author Keywords: forme arcade maxillaire, forme de l'incisive centrale maxillaire, forme du visage, théorie de Williams, choix des dents.
How to Cite this Article
Aicha Oubbaih, Yasmina Cheikh, Fadwa Sedki, Zineb Bazzi, Samira Bellemkhannate, and Khadija Kaoun, “Correlation between the face form, the central maxillary incisor form and the maxillary arch form : Epidemiological study on Moroccan students,” International Journal of Innovation and Applied Studies, vol. 26, no. 3, pp. 720–731, June 2019.
