Titre du document / Document title

Viscoelastic properties of bone as a function of hydration state determined by nanoindentation

Auteur(s) / Author(s)

BEMBEY A. K. ⁽¹⁾ ; OYEN M. L. ⁽²⁾ ; BUSHBY A. J. ⁽¹⁾ ; BOYDE A. ⁽³⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Materials, Queen Mary, University of London, Mile End Road, London EI 4NS, ROYAUME-UNI
⁽²⁾ Center for Applied Biomechanics, Department of Mechanical and Aerospace Engineering, University of Virginia, 1011 Linden Ave, Charlottesville, VA 22902, ETATS-UNIS
⁽³⁾ Biophysics Section, Centre for Oral Growth and Development, Dental Institute, Queen Mary, University of London, New Road, London EI 1BB, ROYAUME-UNI

Résumé / Abstract

Spherical indentation creep testing was used to examine the effect of hydration state on bone mechanical properties. Analysis of creep data was based on the elastic-viscoelastic correspondence principle and utilized a direct solution for the finite loading-rate experimental conditions. The zero-time shear modulus was computed from the creep compliance function and compared to the indentation modulus obtained via conventional indentation analysis, based on an elastic unloading response. The method was validated using a well-known polymer material under three different loading conditions. The method was applied to bone samples prepared with different water content by partial exchange with ethanol, where 70% ethanol was considered as the baseline condition. A hydration increase was associated with a 43% decrease in stiffness, while a hydration decrease resulted in a 20% increase in bone tissue stiffness.

Revue / Journal Title

Philosophical magazine   ISSN 1478-6435 

Source / Source

Congrès
Instrumented indentation testing in materials research and development. Conference, Crete , GRECE (09/10/2005)
2006, vol. 86, n^o 33-35 (618 p.)  [Document : 13 p.] (32 ref.), pp. 5691-5703 [13 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Taylor and Francis, Abingdon, ROYAUME-UNI  (2003) (Revue)

Mots-clés anglais / English Keywords

Polymer ; Bone ; Mechanical compliance ; Tissue ; Shear modulus ; Data analysis ; Mechanical properties ; Creep test ; Stiffness ; Spherical shape ; Nanoindentation ; Hydration ; Viscoelasticity ;

Mots-clés français / French Keywords

8715L ; Polymère ; Os ; Complaisance ; Tissu ; Module cisaillement ; Analyse donnée ; Propriété mécanique ; Essai fluage ; Rigidité ; Forme sphérique ; Nanoindentation ; Hydratation ; Viscoélasticité ;

Mots-clés espagnols / Spanish Keywords

Polímero ; Hueso ; Complacencia ; Tejido ; Módulo cizalladura Coulomb ; Análisis datos ; Propiedad mecánica ; Prueba arrastre ; Rigidez ; Forma esférica ; Nanoindentacion ; Hidratación ; Viscoelasticidad ;

Localisation / Location

INIST-CNRS, Cote INIST : 134 A3, 35400015717078.0400