2011
DOI: 10.4012/dmj.2010-181
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Viscoelastic properties of low-shrinking composite resins compared to packable composite resins

Abstract: The aim of this study was to evaluate the viscoelastic properties of novel low-shrinking composites and compare them to those of packable composites. Six materials were tested: Clearfil Majesty Posterior (CM), ELS Extra Low Shrinkage (EL), Filtek P60 (FP), Filtek Silorane (FS), Prodigy (PR) and Surefil (SU). Static and dynamic testing was performed and materials were tested dry and wet at different temperatures (21°C to 50°C). Shear and flexural modulus, loss tangent, dynamic viscosity, Poisson's ratio and cre… Show more

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Cited by 28 publications
(28 citation statements)
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“…Once the resin matrix determines the reduction in volume when the dense cross-linked polymer network is created, 16 these RCs are expected to develop low shrinkage during polymerization. While the silorane-based RC has been exhaustively evaluated regarding its shrinkage values 14,17 and mechanical properties, 18,19 little information is available in the literature concerning the shrinkage and mechanical properties of these highly filled LSRCs. 17 The analysis of flexural strength (FS) and flexural modulus (FM), along with volumetric shrinkage (VS), is crucial in predicting the clinical success of composites.…”
Section: Introductionmentioning
confidence: 99%
“…Once the resin matrix determines the reduction in volume when the dense cross-linked polymer network is created, 16 these RCs are expected to develop low shrinkage during polymerization. While the silorane-based RC has been exhaustively evaluated regarding its shrinkage values 14,17 and mechanical properties, 18,19 little information is available in the literature concerning the shrinkage and mechanical properties of these highly filled LSRCs. 17 The analysis of flexural strength (FS) and flexural modulus (FM), along with volumetric shrinkage (VS), is crucial in predicting the clinical success of composites.…”
Section: Introductionmentioning
confidence: 99%
“…[26] A consensus exists that the rheological properties of resin composites play an important role in terms of restoration longevity. [9,[27][28][29][30] Clinically, an unpolymerized resin composite is placed and exposed while in a varied viscous state and variations in the conversion values can be reached as the rheological properties of resin composites influence the radical mobility, depending on the viscosity [17] and on the consistency. [20] As very high packing densities (high consistency) can be achieved with an appropriate selection of the particle size and proportions, [26] the increase in the viscosity of resin composites will also be dependent on increasing the filler content, adding filler with an irregular surface, or incorporating glass fiber.…”
Section: Discussionmentioning
confidence: 99%
“…Considering the polymerization shrinkage, research have shown that silorane materials do have a lower shrinkage when compared to methacrylate based composites thus exhibiting lower polymerization stress (1.4-4.4 MPa for Filtek Silorane) 22) . Also, thermocycling and food simulating liquids exposure affected silorane composite significantly less than conventional methacrylate-based composite material [23][24][25] . Additionally, by the method of micro-Raman spectroscopy, it has been confirmed that the hybrid-layer, created by the silorane adhesive system, is of a comparable thickness to that created by the methacrylate-based adhesives 26) .…”
Section: Discussionmentioning
confidence: 99%