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Related Experiment Videos

[Adhesive strength and bonding behavior in graphite-marked bracket positioning].

A P Muchitsch, H Droschl, H P Bantleon

    Fortschritte Der Kieferorthopadie
    |February 1, 1989
    PubMed
    Summary

    Graphite marking on dental brackets does not affect adhesion durability or shear forces in orthodontic treatment. This finding applies to both in-vivo and in-vitro studies, ensuring reliable bracket bonding.

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    Area of Science:

    • Orthodontics
    • Biomaterials Science
    • Dental Adhesion

    Background:

    • Fixed orthodontic appliances utilize bonded brackets for tooth movement.
    • The use of graphite marking during bracket placement is a procedural consideration.
    • Understanding factors influencing bracket adhesion is crucial for treatment success.

    Purpose of the Study:

    • To investigate the influence of graphite marking on bracket adhesion durability.
    • To evaluate the effect of graphite marking on the shear forces required for bracket debonding.
    • To assess adhesive penetration in etched enamel with and without graphite marking.

    Main Methods:

    • In-vivo study: 11 patients, 164 brackets bonded with and without graphite marking over one year.
    • In-vitro study: 8 pairs of teeth subjected to similar bonding conditions.
    • Shear bond strength testing using a universal testing machine.
    • Light microscopy to examine adhesive penetration in etched enamel.

    Main Results:

    • No statistically significant correlation found between graphite marking and adhesion durability (in-vivo and in-vitro).
    • No statistically significant correlation found between graphite marking and required shear forces (in-vivo and in-vitro).
    • Light microscopy showed no adverse effects of graphite marking on adhesive penetration or enamel etching.

    Conclusions:

    • Graphite marking during bracket placement does not compromise bond strength or durability in orthodontic treatment.
    • The presence or absence of graphite marking is not a critical factor for reliable bracket adhesion.
    • Current bonding protocols involving graphite marking are considered safe and effective.

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