L’occlusion dentaire chez les primates supérieurs. Application d’un modèle réduit d’occlusion : la « matrice occlusale » |
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Authors: | Pascal Guichard Jean Daniel Orthlieb |
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Affiliation: | a UMR 6569, laboratoire d’anthropologie, faculté de médecine Nord, université de La Méditerranée, boulevard Pierre-Dramard, 13916 Marseille cedex 20, Franceb MCU-PH, faculté d’odontologie de Marseille, 27, boulevard Jean-Moulin, 13385 Marseille cedex 5, France |
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Abstract: | We analyzed by a reduced-scale model of occlusion named “occlusal matrix” (M.O.), the report of the dental arches between the various anatomical pillars which are the first permanent molars (M1) and the final canines (C). We define thus 3 measurements, the total area of the occlusal matrix: M.O. (AT), the area of the superior face, representing palatine face: M.O. (FS) and the area of the inferior face: M.O. (FI), representing mandibulary face. This morphometric study was carried out on skulls of current Great Apes (Pan, Gorilla and Pongo), medieval and subcurrent populations living in southeast France (Provence) and on skulls mouldings of fossil Hominids. In the evolution of Hominoïds towards the current man, a regular reduction of studied areas and thus of the jaws is confirmed by the recourse to these 3 new measurements designated by our study. In addition, the various stages of this reduction correspond in all points to those described for the general evolution of the higher primates. So, these 3 new measurements appear like particularly powerful describing with a simple tool the occlusal evolution of the Hominoïds and making it possible to better define their phyletic position within the framework of paleontological research. |
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Keywords: | Occlusion dentaire Hominidea Pongidae Modé lisation Maxillaire Mandibule Anatomie comparé e |
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