Journal
ACTA BIOMATERIALIA
Volume 6, Issue 12, Pages 4560-4565Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2010.07.023
Keywords
Enamel; Modulus of elasticity; Hardness; Fracture; Tooth mechanics
Funding
- NIST Internal Review Board
- National Science Foundation [0851351]
- National Research Council
- George Washington University
- Division Of Behavioral and Cognitive Sci
- Direct For Social, Behav & Economic Scie [0851351, 1118385] Funding Source: National Science Foundation
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A comparative study has been made of human and great ape molar tooth enamel. Nanoindentation techniques are used to map profiles of elastic modulus and hardness across sections from the enamel-dentin junction to the outer tooth surface. The measured data profiles overlap between species, suggesting a degree of commonality in material properties. Using established deformation and fracture relations, critical loads to produce function-threatening damage in the enamel of each species are calculated for characteristic tooth sizes and enamel thicknesses. The results suggest that differences in load-bearing capacity of molar teeth in primates are less a function of underlying material properties than of morphology. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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