The addition of silica nanoparticles on the mechanical properties of dental stone

Abstract Statement of problem The current application of nanotechnology in dentistry is limited to nanoparticles incorporated into adhesive systems and composite resins. Dental stone is a widely used material, and the incorporation of silica nanoparticles is still unexplored. Purpose The purpose of...

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Published in:The Journal of prosthetic dentistry 2017-10, Vol.118 (4), p.535-539
Main Authors: De Cesero, Leonardo, DDS, MS, PhD, de Oliveira, Elisa Magno Nunes, MS, PhD, Burnett Junior, Luiz Henrique, DDS, MS, PhD, Papaléo, Ricardo Meurer, DDS, MS, PhD, Mota, Eduardo Gonçalves, DDS, MS, PhD
Format: Article
Language:English
Subjects:
Calcium Sulfate
Compressive Strength
Dental Materials
Dentistry
Materials Testing
Nanoparticles
Silicon Dioxide
Tensile Strength
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Summary:Abstract Statement of problem The current application of nanotechnology in dentistry is limited to nanoparticles incorporated into adhesive systems and composite resins. Dental stone is a widely used material, and the incorporation of silica nanoparticles is still unexplored. Purpose The purpose of this in vitro study was to evaluate the mechanical properties of dental stone after the addition of silica nanoparticles in different concentrations. Material and methods A total of 180 specimens were prepared, 90 for each dental stone (Durone and Fuji Rock). For the control group (CG), no silica particles were added, while test group TGnI had silica nanoparticles added to 1 wt%, and test group TGnV had silica nanoparticles added to 5 wt%. The roughness, diametral tensile strength (DTS), and compressive strength were measured 24 hours after the start of spatulation. Results The mean roughness values for Durone were 0.55, 0.36, and 0.28 μm for CG, TGnI, and TGnV; for Fuji Rock, the mean roughness values were 0.47 for CG, 0.31 for TGnI, and 0.35 μm for TGnV. The mean DTS values for Durone were 6.0, 5.1, and 5.0 MPa for CG, TGnI, and TGnV, respectively, and for Fuji Rock, the mean DTS values were 6.4, 5.2, and 4.5 MPa for CG, TGnI, and TGnV, respectively. The mean compressive strength values for Durone were 35.4, 32.7, and 32.4 MPa for CG, TGnI, and TGnV, respectively, and for Fuji Rock, the mean compressive strength values were 42.9, 31.2, and 29.8 MPa for CG, TGnI, and TGnV respectively. Conclusions Surface roughness was statistically lower for the Durone and Fuji Rock stones ( P .05) but did affect the DTS of Fuji Rock when 5 wt% was added and the compressive strength in both concentrations ( P
ISSN:0022-3913
1097-6841
DOI:10.1016/j.prosdent.2017.01.001