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Temporomandibular Joint Pain Measurement by Bite Force and Von Frey Filament Assays in Mice

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Determining primates bite force from histological tooth sections.

¹School of Mechanical Engineering, Tel-Aviv University, Tel-Aviv, Israel.

American Journal of Physical Anthropology

|January 9, 2020

Summary

This summary is machine-generated.

A new method estimates primate bite force using tooth enamel thickness and dentin horn angle from fossil teeth. This approach simplifies bite force analysis and reveals evolutionary relationships between bite force, body mass, and crown area.

Keywords:

bite force body mass crown area dentin horn enamel thickness human evolution primates

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Area of Science:

Paleontology
Biological Anthropology
Biomechanics

Background:

Estimating primate bite force (BF) is crucial for biological anthropology.
Traditional methods require complex analyses and complete cranial morphology.
A simpler method using fossil teeth is needed.

Purpose of the Study:

Propose a simple method to determine primate bite force (BF).
Utilize data from histological sections of fossil teeth.
Link BF to evolutionary trends in primates.

Main Methods:

Examined molar teeth sections from 27 extinct and extant primate species.
Measured enamel thickness (d_c) and dentin horn angle (φ) in cusp regions.
Used finite element analysis to determine cusp fracture force (P_F) and linked it to BF.

Main Results:

Established a conclusive link between d_c and φ, yielding a constant P_F and BF.
Derived an explicit formula relating BF to d_c and φ.
Found strong correlations between BF, molar crown area, and body mass in nonhominins; hominin BF is gender-averaged.

Conclusions:

Fracture mechanics applied to tooth histology provides a novel way to determine primate BF.
This method offers quantitative insights into evolutionary trends related to crown area, body mass, and BF.
The approach can be extended to other mammals with asymmetric cusp structures.