Effect of filler size and morphology on viscoelastic stability of resin-composites under dynamic loading

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    Abstract

    Effect of variation in filler particle size, morphology and wet conditioning on the viscoelastic stability of resin-composites under dynamic loading was investigated. Eight experimental light cured resin-composites were selected. For each of the eight resin-composites, ten cylindrical specimens (4 × 6 mm), divided into two subgroups (n = 5) were prepared. Group 1 and 2 were loaded dynamically after 1 day of dry storage and 1 week of wet storage, respectively. A cyclic load between 1 and 50 MPa was applied for both groups at a frequency of 0.25 Hz for 30 min to obtain the 'dynamic' creep strain (%). Data was analysed by univariate ANOVA. Unimodal spherical and irregular resin-composites showed a significant influence of particle size and shape on dynamic creep under dry condition, but not for wet conditions. Irregular filler particles in both unimodal and multimodal resin-composites were more resistant to dynamic creep under wet conditions and showed higher stiffness. © 2012 Springer Science+Business Media, LLC.
    Original languageEnglish
    Pages (from-to)623-627
    Number of pages4
    JournalJournal of Materials Science: Materials in Electronics
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - Mar 2012

    Keywords

    • *Elasticity
    • *Viscosity

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