Contraction stress of flowable composite materials and their efficacy as stress-relieving layers

Braga, Roberto Ruggiero; Hilton, Thomas J.; Ferracane, Jack L.

doi:10.14219/jada.archive.2003.0258

Cited by 152 publications

(125 citation statements)

References 16 publications

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“…The use of flowable composite as a liner under composite restorations did not significantly improve fracture resistance over that of glass ionomer/composite restorations. The use of an intermediate layer of lowviscosity or low-elastic modulus flowable composite or glass ionomer has been recommended in order to relieve the stress of polymerization shrinkage 9,37) . Glass ionomer cements have properties that include physicochemical bonding to both enamel and dentin.…”

Section: Discussionmentioning

confidence: 99%

The effects of glass ionomer and flowable composite liners on the fracture resistance of open-sandwich class II restorations

et al. 2013

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This in vitro study aimed to investigate the effects of glass-ionomer and flowable composite liners on the fracture resistance of Class II amalgam and composite restorations. Group 1 cavities were restored with amalgam and Group 4 cavities with nanofill composite after the application of a dentin-bonding agent. For the remaining groups, light-cured-glass-ionomer liner was used in a gingival floor proximal box (Groups 2, 5) or flowable composite was used as a liner (Groups 3, 6), the remainder of the cavity was restored with amalgam (Groups 2, 3) or composite (Groups 5, 6). The restorations were loaded in compression to failure. The data was analyzed using Tukey's multiple comparison test. The fracture resistance was significantly higher (p<0.05) in Group 3 than in all other groups, except Group 2 (p>0.05). Flowable composite, glass-ionomer liners increased the fracture resistance of open-sandwich Class II amalgam restorations.

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Section: Discussionmentioning

confidence: 99%

The effects of glass ionomer and flowable composite liners on the fracture resistance of open-sandwich class II restorations

et al. 2013

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Section: Stress Absorbing Intermediate Layermentioning

confidence: 99%

“…50 Based on this assumption, using a material with low elastic modulus as an intermediate layer under the composite have been advocated to reduce the shrinkage stress in a concept called 'elastic cavity wall'. 50,51 Several studies have evaluated the use of thicker adhesive layers (usually non-solvated adhesives), glass ionomers, or flowable composites as a stress-absorbing layer. 50,51,52,53,54 Flowable composites usually contain 20 to 25% less fillers than composites with regular viscosity, which reduces their elastic modulus close to those of resin-modified glass ionomers.…”

Section: Stress Absorbing Intermediate Layermentioning

confidence: 99%

“…50,51 Several studies have evaluated the use of thicker adhesive layers (usually non-solvated adhesives), glass ionomers, or flowable composites as a stress-absorbing layer. 50,51,52,53,54 Flowable composites usually contain 20 to 25% less fillers than composites with regular viscosity, which reduces their elastic modulus close to those of resin-modified glass ionomers. However, reducing filler content of flowable composites means increasing the ratio of the resin matrix.…”

Section: Stress Absorbing Intermediate Layermentioning

confidence: 99%

“…Reduction of cusp deflection was also reported when flowable composite 54 or glass ionomer 56 was placed under a composite with regular viscosity, although reduction in shrinkage stress was not apparent. 51 Braga et al 50 reported that the effect of flowable composites as intermediate layer on stress reduction is limited and depends on the elastic modulus of lining material; while an indirect correlation between stress reduction and elastic modulus was observed. Clinical trial of placing a flowable composite as an intermediate layer did not exhibit a positive outcome, 57 while using glass ionomer under a composite restoration increased the risk of restoration fractures.…”

Section: Stress Absorbing Intermediate Layermentioning

confidence: 99%

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Polymerization shrinkage stress of composite resins and resin cements – What do we need to know?

et al. 2017

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Polymerization shrinkage stress of resin-based materials have been related to several unwanted clinical consequences, such as enamel crack propagation, cusp deflection, marginal and internal gaps, and decreased bond strength. Despite the absence of strong evidence relating polymerization shrinkage to secondary caries or fracture of posterior teeth, shrinkage stress has been associated with postoperative sensitivity and marginal stain. The latter is often erroneously used as a criterion for replacement of composite restorations. Therefore, an indirect correlation can emerge between shrinkage stress and the longevity of composite restorations or resin-bonded ceramic restorations. The relationship between shrinkage and stress can be best studied in laboratory experiments and a combination of various methodologies. The objective of this review article is to discuss the concept and consequences of polymerization shrinkage and shrinkage stress of composite resins and resin cements. Literature relating to polymerization shrinkage and shrinkage stress generation, research methodologies, and contributing factors are selected and reviewed. Clinical techniques that could reduce shrinkage stress and new developments on low-shrink dental materials are also discussed.

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Practical and Predictable Class II and III Direct Composite Restorations

2017

Supra‐Gingival Minimally Invasive Dentistry

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Contraction stress of flowable composite materials and their efficacy as stress-relieving layers

Cited by 152 publications

References 16 publications

The effects of glass ionomer and flowable composite liners on the fracture resistance of open-sandwich class II restorations

The effects of glass ionomer and flowable composite liners on the fracture resistance of open-sandwich class II restorations

Polymerization shrinkage stress of composite resins and resin cements – What do we need to know?

Practical and Predictable Class II and III Direct Composite Restorations

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