On the relationship between tooth shape and masticatory efficiency: a finite element study

Journal article


Berthaume, M. (2016). On the relationship between tooth shape and masticatory efficiency: a finite element study. The Anatomical Record. 299 (5), pp. 679-687. https://doi.org/10.1002/ar.23328
AuthorsBerthaume, M.
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 and requires location and shape specific information, which are absent from dental topographic metrics. This makes it unlikely any one efficiency metric will be correlated to all topographic metrics. These results emphasize the need to take into account how food items break down during biting, ingestion, and mastication when investigating the mechanical relationship between food item shape, size, mechanical properties, and breakdown, and tooth shape.

Keywordsdental topography; finite element analysis; parametric finite element modeling; ambient occlusion (PCV); food item breakdown efficiency
Year2016
JournalThe Anatomical Record
Journal citation299 (5), pp. 679-687
PublisherWiley
ISSN0003-276X
Digital Object Identifier (DOI)https://doi.org/10.1002/ar.23328
Publication dates
Print22 Feb 2016
Publication process dates
Accepted08 Oct 2015
Deposited14 Nov 2019
Accepted author manuscript
License
File Access Level
Open
Additional information

This is the peer reviewed version of the following article: Berthaume, M. A. (2016), On the Relationship Between Tooth Shape and Masticatory Efficiency: A Finite Element Study. Anat. Rec., 299: 679-687. , which has been published in final form at https://doi.org/10.1002/ar.23328. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions

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