R-curve behavior and micromechanisms of fracture in resin based dental restorative composites

Shah, Minalben B.; Ferracane, Jack L.; Kruzic, Jamie J.

doi:10.1016/j.jmbbm.2008.12.005

Cited by 54 publications

(69 citation statements)

References 48 publications

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“…The proneness toward higher fracture toughness in composites with larger particles has been identified in previous studies. 11,29,30 Filler particles dispersed in the resin matrix may act as toughening agents either by causing deflection of the crack, when the crack path is forced to change its direction (with an associated reduction in stress intensity) in order to continue its propagation through the lower resistance polymer matrix, or by crack bridging, when the particles prevent opening of the crack wave. 8,9,10,11 The larger particles in these groups could have contributed to improving both toughening mechanisms, thus reducing the stress intensity at the crack tip and preventing its unstable growth.…”

Section: Discussionmentioning

confidence: 99%

“…The properties of resin composites can be defined by the characteristics of the organic matrix network, 1,2 the reinforcing phase 3,4,5,6,7,8,9,10,11 and the silane interphase, responsible for chemically bonding the organic and inorganic phases. 12,13,14,15,16,17 The silane interphase is most commonly composed of the 3-MPTS (γ-3-methacryloxypropyltrimethoxysilane) monomer, a bifunctional molecule capable of both polymerizing with the organic resin matrix and establishing a covalent oxane bond (Si-O-Si) with the surface of the filler particles.…”

Section: Introductionmentioning

confidence: 99%

“…3,4,5,6,7,8,11 In addition to the volumetric filler fraction and particle shape, aspects such as particle size distribution help define the behavior of the material. 4,5,6,7 Variations in the particle size may affect the absorption of the energy generated during mechanical loading, and, therefore, influence the mechanical properties of the composite.…”

Section: Introductionmentioning

confidence: 99%

“…4,5,6,7 Variations in the particle size may affect the absorption of the energy generated during mechanical loading, and, therefore, influence the mechanical properties of the composite. 8,11 Nonetheless, there are a small number of studies analyzing the influence of the overall inorganic phase particle size distribution on the chemicalmechanical properties of dental composites, mainly those similar to commercial materials.…”

Section: Introductionmentioning

confidence: 99%

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Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

et al. 2015

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This study investigated the influence of silane concentration and filler size distribution on the chemical-mechanical properties of experimental composites. Experimental composites with silane contents of 0%, 1% and 3% (in relation to filler mass) and composites with mixtures of barium glass particles (median size = 0.4, 1 and 2 μm) and nanometric silica were prepared for silane and filler analyses, respectively. The degree of conversion (DC) was analyzed by FTIR. Biaxial flexural strength (BFS) was tested after 24-h or 90-d storage in water, and fracture toughness, after 24 h. The data were subjected to ANOVA and Tukey's test (p = 0.05). The DC was not significantly affected by the silane content or filler distribution. The 0% silane group had the lowest immediate BFS, and the 90-d storage time reduced the strength of the 0% and 3% groups. BFS was not affected by filler distribution, and aging decreased the BFS of all the groups. Silanization increased the fracture toughness of both the 1% and 3% groups, similarly. Significantly higher fracture toughness was observed for mixtures with 2 μm glass particles. Based on the results, 3% silane content boosted the initial strength, but was more prone to degradation after water storage. Variations in the filler distribution did not affect BFS, but fracture toughness was significantly improved by increasing the filler size.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

et al. 2015

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“…Composites with PPRF do polish well, and in fact have been shown to produce composites that retain smoother surfaces after abrasion than commercial hybrid composites containing a high concentration of irregular-shaped fillers [21]. In contrast, the incorporation of clusters of nano-sized inorganic particles in a commercial composite does not negatively affect mechanical properties, in large part because of the fact that high filler loadings can be accomplished and the particle clusters serve as efficient reinforcing agents [22][23][24].…”

Section: Fracture Toughness and Fatigue Behaviormentioning

confidence: 99%

Microstructural Features of Current Resin Composite Materials

Ferracane

Pfeifer

Hilton

2014

Curr Oral Health Rep

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Dental resin composites have become the primary choice of most practitioners for the direct restoration of teeth owing to their esthetics and properties, both of which are highly dependent upon the microstructure of the materials. The type, size, amount, and distribution of the reinforcing fillers are all critical determinants of the optical and physical properties of the composite. The chemistry of the resin monomers and the quality of the highly cross-linked network formed during the polymerization reaction significantly influences these properties. Finally, the transfer of stress from the weaker resin matrix to the stronger and stiffer reinforcing fillers is accomplished by ensuring a strong interfacial linkage between the two phases, typically via a silane coupling agent. Recent work characterizing and describing the influence of the microstructure of dental composites on their properties and performance are reviewed in this manuscript.

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Fracture load of CAD/CAM-fabricated and 3D-printed composite crowns as a function of material thickness

et al. 2018

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OBJECTIVES: Indirect CAD/CAM restorations can be fabricated using both subtractive and additive CAD/CAM technology. This study investigated the fracture load of crowns fabricated from three particle-filled composite CAD/CAM materials and one 3D-printed composite material. MATERIALS AND METHODS: Lava Ultimate, Cerasmart and Brilliant Crios were used as particle-filled composite CAD/CAM material and els-3D Harz as 3D-printed composite material. For each group, crowns with three different material thicknesses (0.5/1.0/1.5 mm) were fabricated. Control group was composed of ceramic-based CAD/CAM materials e.max CAD and Enamic. Totally, n = 180 crowns were fabricated and adhesively seated on SLA fabricated dies. Thermomechanical loading and fracture testing were performed. The data for fracture loading force were statistically analyzed by two-way ANOVA followed with multiple comparisons by post hoc Tukey's test (= 0.05). RESULTS: In contrast to ceramics, all particle-filled composite crowns with 0.5-mm thickness survived fatigue testing. Forces varied statistically significantly. Brilliant Crios showed highest maximum loading force with 1580.4 ± 521.0 N (1.5 mm). Two-way ANOVA indicated that both the material and the thickness affected the fracture load (p < 0.05). CONCLUSIONS: Particle-filled composite resin CAD/CAM materials may have advantageous material characteristics compared to ceramic CAD/CAM materials for minimal restoration thicknesses. CLINICAL RELEVANCE: Composite-based CAD/CAM materials may offer new possibilities in minimally invasive restorative treatment concepts.

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R-curve behavior and micromechanisms of fracture in resin based dental restorative composites

Cited by 54 publications

References 48 publications

Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

Influence of silane content and filler distribution on chemical-mechanical properties of resin composites

Microstructural Features of Current Resin Composite Materials

Fracture load of CAD/CAM-fabricated and 3D-printed composite crowns as a function of material thickness

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