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Microbial adhesion to surfaces with different surface charges

K Larsson, P O Glantz

    Acta Odontologica Scandinavica
    |January 1, 1981
    PubMed
    Summary
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    Streptococcus sanguis adhesion to surfaces depends on their charge. Non-polar surfaces allowed bacterial adhesion, while negatively charged surfaces completely inhibited it, impacting dental plaque formation understanding.

    Area of Science:

    • Biomaterials Science
    • Surface Chemistry
    • Microbiology

    Background:

    • Dental plaque formation involves bacterial adhesion to tooth surfaces.
    • Understanding the initial adhesion mechanisms of oral bacteria is crucial for prevention strategies.
    • Streptococcus sanguis is a key early colonizer in dental plaque.

    Purpose of the Study:

    • To investigate the adhesion behavior of Streptococcus sanguis on controlled surface chemistries.
    • To determine the influence of surface polarity and charge on bacterial adhesion.
    • To relate findings to the initial stages of dental plaque formation.

    Main Methods:

    • Utilized the Langmuir-Blodgett technique to create well-defined stearic and behenic acid multilayers on a solid substrate.
    • Engineered surfaces with either non-polar methyl end-groups or high-density negatively charged carboxyl end-groups by adjusting substrate pH.

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  • Quantified Streptococcus sanguis adhesion on these engineered surfaces and a reference metal surface.

    • Main Results:

    • Streptococcus sanguis exhibited similar adhesion levels on non-polar (methyl-terminated) surfaces as on the reference metal surface.
    • Bacterial adhesion was completely inhibited on multilayers presenting high-density negative charges (carboxyl groups).
    • Surface charge significantly dictates the initial adhesion of Streptococcus sanguis.

    Conclusions:

    • Surface properties, particularly negative charge, play a critical role in preventing Streptococcus sanguis adhesion.
    • These findings provide insights into the initial colonization phase of dental plaque formation.
    • Tailoring surface properties could offer novel strategies for anti-adhesion therapies in oral hygiene.