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Etching a fiber post surface with high-concentration bleaching agents.

M S Menezes, A L Faria-e-Silva, F P Silva

    Operative Dentistry
    |July 16, 2013
    PubMed
    Summary
    This summary is machine-generated.

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    High-concentration hydrogen peroxide (H2O2) improves resin composite bond strength to fiber posts. Surface treatment with 35% H2O2 enhanced bonding regardless of application method, unlike 24% H2O2.

    Area of Science:

    • Dental Materials Science
    • Biomaterials Engineering
    • Adhesive Dentistry

    Background:

    • Fiber posts require surface treatment for optimal resin composite bonding.
    • Inadequate etching leads to poor adhesion between resin composites and fiber posts.
    • Hydrogen peroxide (H2O2) is explored as a surface treatment agent.

    Purpose of the Study:

    • To evaluate the effect of hydrogen peroxide concentration and application mode on fiber post surface topography.
    • To determine the impact of H2O2 treatment on the bond strength of resin composite to glass-fiber posts.

    Main Methods:

    • Fiber posts were treated with 24% or 35% H2O2 solutions via immersion or microbrush application.
    • Surface topography was analyzed using scanning electron microscopy.

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  • Tensile bond strength tests were performed on post/resin composite assemblies.

    • Main Results:

    • H2O2 treatment, except for 24% H2O2, increased exposed fibers and bond strength compared to controls.
    • Immersion with 24% H2O2 yielded higher values, but application mode did not affect bond strength with 35% H2O2.
    • Surface topography changes were observed with H2O2 treatment.

    Conclusions:

    • The effectiveness of H2O2 application mode on bond strength is concentration-dependent.
    • High-concentration H2O2 significantly improves resin composite bond strength to fiber posts.
    • Surface treatment with bleaching concentrations of H2O2 is beneficial for dental post adhesion.