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Intra-coronal bleaching: the past, present and future.

Paul D Marin

    Annals of the Royal Australasian College of Dental Surgeons
    |August 3, 2007
    PubMed
    Summary
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    A new reductive-oxidative bleaching method using thiourea and hydrogen peroxide may offer a safer alternative for stained root-filled teeth. This approach aims to control damaging by-product diffusion, potentially reducing the risk of invasive cervical resorption (ICR).

    Area of Science:

    • Dental materials science
    • Endodontics
    • Biomaterials

    Background:

    • Intracoronal bleaching of root-filled teeth commonly uses hydrogen peroxide.
    • Hydrogen peroxide and its by-products can diffuse, potentially causing invasive cervical resorption (ICR).
    • Controlling this diffusion is crucial for safer bleaching outcomes.

    Purpose of the Study:

    • To introduce and evaluate a novel reductive-oxidative bleaching protocol.
    • To assess the efficacy and safety of a thiourea and hydrogen peroxide regimen.
    • To discuss clinical considerations for intra-coronal bleaching.

    Main Methods:

    • A novel bleaching technique combining thiourea and hydrogen peroxide was developed.
    • The protocol focuses on a reductive-oxidative process.

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  • Clinical considerations were reviewed.

    • Main Results:

    • The proposed reductive-oxidative method offers a potentially safer bleaching protocol.
    • This technique may mitigate risks associated with hydrogen peroxide diffusion.
    • Further evaluation is needed to confirm efficacy and safety.

    Conclusions:

    • A novel reductive-oxidative bleaching process using thiourea and hydrogen peroxide is proposed.
    • This method may provide a safer alternative to current oxidative techniques.
    • Minimizing by-product diffusion is key to preventing invasive cervical resorption.