Cracking of human teeth: An avalanche and acoustic emission study.


No Thumbnail Available
Type
Article
Change log
Authors
Wang, Lei 
Cao, Shutian 
Jiang, Xiang 
Salje, Ekhard KH 
Abstract

Teeth are the hardest part of the human body. Cracking of human teeth under compression progresses by avalanches emitting acoustic noise. Acoustic emission (AE) spectroscopy reveals that tooth avalanches are statistically fully compatible with predictions of mean field (MF) theory. Avalanche energies collapse into a power law distributed which is stable over more than five decades with an energy exponent ε = 1.4. Acoustic amplitudes (exponent ~τ), durations (~α), correlations between amplitudes and energies (~x), and correlations between amplitude and duration (~χ) follow equally power laws with MF values of all exponents. The exponents correlation: τ-1 = x(ε-1) = (α-1)/χ is confirmed. Crack propagation bifurcates and shows the hallmarks of avalanches where main cracks nucleate secondary cracks.

Description
Keywords
Acoustic emission, Cracking, Human teeth, Mean field theory, Power law, Acoustics, Avalanches, Humans, Physical Phenomena
Journal Title
J Mech Behav Biomed Mater
Conference Name
Journal ISSN
1751-6161
1878-0180
Volume Title
122
Publisher
Elsevier BV
Rights
All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/P024904/1)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (861153)