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Effect of Filler Size and Temperature on Packing Stress and Viscosity of Resin-composites
School of Dentistry, University of Manchester, Higher Cambridge Street, Manchester M15 6FH, UK
* Author to whom correspondence should be addressed.
Received: 28 June 2011; in revised form: 12 July 2011 / Accepted: 12 August 2011 / Published: 18 August 2011
Abstract: The objective of this study was to investigate the effect of filler size on the packing stress and viscosity of uncured resin-composite at 23 °C and 37 °C. A precision instrument used was designed upon the penetrometer principle. Eight resin-composite materials were tested. Packing-stress ranged from 2.60 to 0.43 MPa and viscosity ranged from 2.88 to 0.02 MPa.s at 23 °C. Values for both properties were reduced significantly at 37 °C. Statistical analysis, by ANOVA and post hoc methods, were carried out to check any significant differences between materials tested (P < 0.05). Conclusions: Filler size and distribution will affect the viscosity and packing of resin-composites during cavity placement.
Keywords: packing; resin-composites; nanofillers; viscosity
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Elbishari, H.; Satterthwaite, J.; Silikas, N. Effect of Filler Size and Temperature on Packing Stress and Viscosity of Resin-composites. Int. J. Mol. Sci. 2011, 12, 5330-5338.
Elbishari H, Satterthwaite J, Silikas N. Effect of Filler Size and Temperature on Packing Stress and Viscosity of Resin-composites. International Journal of Molecular Sciences. 2011; 12(8):5330-5338.
Elbishari, Haitham; Satterthwaite, Julian; Silikas, Nick. 2011. "Effect of Filler Size and Temperature on Packing Stress and Viscosity of Resin-composites." Int. J. Mol. Sci. 12, no. 8: 5330-5338.