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BioMed Research International
Volume 2017, Article ID 7852971, 7 pages
Research Article

The Elasticity Coefficients Measurement of Human Dentin Based on RUS

Key Laboratory of Ministry of Education for Biomechanics and Mechanobiology, School of Biological Science and Medical Engineering, Beihang University, Beijing, China

Correspondence should be addressed to Haijun Niu; nc.ude.aaub@uinjh

Received 4 November 2016; Accepted 5 April 2017; Published 30 April 2017

Academic Editor: Andrea Scribante

Copyright © 2017 Fan Fan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper proposed to take advantages of resonant ultrasound spectroscopy (RUS) to measure the mechanical properties of human dentin specimen. The resonant spectroscopy of the dentin specimen was obtained between the frequency bands 155 and 575 kHz, and resonant frequencies were extracted by linear predictive filter and then by Levenberg-Marquardt method. By inverse problem approach, 13 experimental resonant frequencies progressively matched to the first 30 orders of theoretical resonant frequencies calculated by Lagrangian variational method. The full second-order elastic tensor of dentin specimen was adjusted. The whole set of human dentin engineering moduli, including Young’s moduli ( GPa,  GPa), shear moduli ( GPa,  Gpa), and Poisson’s ratios (, ), were finally calculated. This study demonstrates that RUS can be successfully adapted to measure the mechanical properties of low quality factor biomaterials.