Volume 8, Number 2 (spring 2011 2011)                   IJMSE 2011, 8(2): 25-33 | Back to browse issues page


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F. Foroutan, J. Javadpou, A. khavandi, M. Atai, H. R. Rezaie. MECHANICAL PROPERTIES OF DENTAL COMPOSITE MATERIALS REINFORCED WITH MICRO AND NANO-SIZE Al2O3 FILLER PARTICLES. IJMSE. 2011; 8 (2) :25-33
URL: http://ijmse.iust.ac.ir/article-1-338-en.html

Abstract:   (5950 Views)
Abstract: Composite specimens were prepared by dispersion of various amounts of nano-sized Al2O3 fillers in a monomer system containing 60% Bis-GMA and 40% TEGDMA. For comparative purposes, composite samples containing micrometer size Al2O3 fillers were also prepared following the same procedure. The mechanical properties of the light- cured samples were assessed by three-point flexural strength, diametral tensile strength, and microhardness tests. The results indicated a more than hundred percent increase in the flexural strength and nearly an eighty percent increase in the diametral tensile strength values in the samples containing nano-size Al2O3 filler particles. It is interesting to note that, this improvement was observed at a much lower nano-size filler content. Fracture surfaces analyzed by scanning electron microscopy, indicated a brittle type of fracture in both sets of specimens.
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Type of Study: Research paper |

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