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Microstructure and Elastic Properties of Dental Resin and Resin-Based Glass-Reinforced Composites: XRD, SEM and Ultrasonic Methods

Published online by Cambridge University Press:  26 February 2011

Surendra Singh ,
J. Lawrence Katz ,
J. Antonucci ,
R. W. Penn  and
J. A. Tesk
Surendra Singh
Affiliation:
Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
J. Lawrence Katz
Affiliation:
Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
J. Antonucci
Affiliation:
Dental and Medical Materials, Polymer Division, National Bureau of Standards, Gaithersburg, MD 20899
R. W. Penn
Affiliation:
Dental and Medical Materials, Polymer Division, National Bureau of Standards, Gaithersburg, MD 20899
J. A. Tesk
Affiliation:
Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
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Abstract

The load-bearing ability of dental restorative materials under cyclic high-stress applications depends upon mechanical properties established by the composition and microstructure. The microstructure and the elastic properties of neat resin and two resin-based glass-reinforced composites have been studied. The microstructure of these materials has been examined using x-ray diffractometry (XRD), scanning electron microscopy (SEM) including energy dispersive spectrometry (EDS). The elastic properties, i.e., Young's, shear and bulk moduli and Poisson's ratio were determined from ultrasonic velocities and densities. The ultrasonic velocities were measured using a pulse-through transmission method; density was measured using a buoyant force method. These studies showed that: (1) these materials have amorphous structures; (2) these materials have Young's moduli of the order of 20 GPa, and (3) the silane couplant apparently did not significantly affect the elastic properties of these resin-based composites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 110: Symposium M – Biomedical Materials and Devices , 1987 , 599
Copyright
Copyright © Materials Research Society 1988

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