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Related Experiment Videos

Porosity in posterior composite resins.

J W van Dijken, I E Ruyter, R I Holland

    Scandinavian Journal of Dental Research
    |October 1, 1986
    PubMed
    Summary

    Porosity in dental composite resins varies by preparation method. Condensed specimens generally showed higher percent pore area but smaller mean pore size compared to pressure-molded ones.

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    Area of Science:

    • Materials Science
    • Biomaterials Engineering
    • Dental Materials Science

    Background:

    • Composite resins are widely used dental restorative materials.
    • Understanding their porosity is crucial for predicting material performance and longevity.
    • Porosity can influence mechanical properties and biocompatibility.

    Purpose of the Study:

    • To quantify and compare the percent pore area and mean pore size of nine composite resin brands.
    • To investigate the effect of two preparation methods (condensation vs. pressure) on porosity.
    • To explore potential correlations between porosity, pore size, and curing method.

    Main Methods:

    • Nine brands of composite resin restorative materials were tested.
    • Specimens were prepared using either condensation or pressure techniques.
    • Percent pore area and mean pore size were measured for each specimen.

    Main Results:

    • Overall percent porosity ranged from 0.01% to 4.5%.
    • Most materials exhibited higher percent porosity in condensed specimens compared to pressure-molded ones.
    • Mean pore sizes were consistently smaller in condensed specimens than in pressure-molded ones.

    Conclusions:

    • The preparation method significantly impacts the porosity of composite resin materials.
    • Condensation generally leads to higher surface porosity but finer pores.
    • No correlation was found between mean pore size or total porosity and the curing method.

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