On the Relationship Between Tooth Shape and Masticatory Efficiency: A Finite Element Study

The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology
Michael A Berthaume

Abstract

Dental topography has successfully linked disparate tooth shapes to distinct dietary categories, but not to masticatory efficiency. Here, the relationship between four dental topographic metrics and brittle food item breakdown efficiency during compressive biting was investigated using a parametric finite element model of a bunodont molar. Food item breakdown efficiency was chosen to represent masticatory efficiency as it isolated tooth-food item interactions, where most other categories of masticatory efficiency include several aspects of the masticatory process. As relative food item size may affect the presence/absence of any relationship, four isometrically scaled, hemispherical, proxy food items were considered. Topographic metrics were uncorrelated to food item breakdown efficiency irrespective of relative food item size, and dental topographic metrics were largely uncorrelated to one another. The lack of a correlation between topographic metrics and food item breakdown efficiency is not unexpected as not all food items break down in the same manner (e.g., nuts are crushed, leaves are sheared), and only one food item shape was considered. In addition, food item breakdown efficiency describes tooth-food item interactions a...Continue Reading

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Citations

Jul 21, 2020·Evolutionary Anthropology·Michael A BerthaumeFranck Guy
Oct 19, 2017·Journal of Human Evolution·Michael A Berthaume, Kes Schroer
Apr 3, 2018·Journal of Human Evolution·Michael A BerthaumeKornelius Kupczik

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