Nanotech 2012 Vol. 1
Nanotech 2012 Vol. 1
Nanotechnology 2012: Advanced Materials, CNTs, Particles, Films and Composites (Volume 1)

Nanoscale Materials Characterization Chapter 1

The effect of nanoparticles on the translucency and antimicrobial activities of experimental resin cements

Authors: B.S. Lim, S.J. Ahn, S.Y. Park

Affilation: Seoul National University, School of Dentistry, Korea

Pages: 113 - 116

Keywords: nanofiller, silver nanoparticles, resin cement, translucency, antimicrobial activity

The purpose of this study was to evaluate the effect of the nanoparticles in experimental resin cements on opacity (contrast ratio) and antibacterial activities. Experimental resin cements were prepared with three different kinds of fillers: silica microfiller (0.04 m), silica nanofiller (< 7 nm), and silver nanoparticles (< 5 nm). The contrast ratios of the specimens were evaluated using a spectrophotometer. The distribution morphology of the filler particles in the resin matrix was also examined using energy-filtering transmission electron microscopy. Surface roughness and surface free energy (SFE) characteristics were measured using confocal laser scanning microscopy and the sessile drop method. Shear bond strength were also analyzed. The experimental resin cements that contained more than 3% nanofiller had significantly lower contrast ratios (p < 0.05). The resin cements that contained 6 wt% nanofiller had contrast ratios 50% lower than the composite that did not contain nanofiller. The experimental resin cements that contained 250 ppm silver nanoparticles showed significantly slower bacterial growth than the resin cements that did not contain silver nanaoparticles. This study suggests that experimental resin cements with silver nanoparticles can help prevent enamel demineralization around their surfaces without compromising esthetical and physical properties.

ISBN: 978-1-4665-6274-5
Pages: 804
Hardcopy: $209.95