Assessment of trabecular bone tissue elasticity with resonant ultrasound spectroscopy.
J Mech Behav Biomed Mater
; 74: 106-110, 2017 10.
Article
em En
| MEDLINE
| ID: mdl-28595101
ABSTRACT
The material properties of the trabeculae (tissue-level properties), together with the trabecular architecture and the bone volume fraction determine the apparent millimetre-scale bone mechanical properties. We present a novel method to measure trabecular tissue elastic modulus Et using resonant ultrasound spectroscopy (RUS). The first mechanical resonance frequency fe of a freestanding cuboid specimen is measured and used to back-calculate Et. The steps of the back-calculation are (1) the apparent stiffness tensors C(EtË) is computed using micro-finite elements for a set of trial values of tissue Young's modulus EtË based on the computed tomography image of the specimen; (2) the modeled free-vibration resonance frequencies fm(EtË) of the specimen is calculated with the Rayleigh-Ritz method using C(EtË); (3) finally, Et is obtained by interpolation using fe and fm(EtË). Four bovine bone specimens were tested (nominal size 5×6 ×6mm3). Average (standard deviation) of Et was 13.12 (1.06)GPa. The measurement of a single resonance frequency enabled an estimation of tissue elasticity in line with available data. RUS is a non destructive technique relatively easy to implement compared to traditional mechanical testing. The novel method could contribute to a better documentation of bone tissue elasticity which is an important parameter of micro-finite element analyses for the clinical assessment of bone strength.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Osso Esponjoso
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Mech Behav Biomed Mater
Ano de publicação:
2017
Tipo de documento:
Article