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Related Experiment Videos

Surface characterization of ceramic brackets: a multitechnique approach

T Eliades1, M Lekka, G Eliades

  • 1Section of Orthodontics, College of Dentistry, Ohio State University, Columbus.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|January 1, 1994
PubMed
Summary

This study examined ceramic brackets, revealing varied microstructures and bonding mechanisms. Some brackets use micromechanical retention, while others incorporate a silane layer for chemical adhesion, impacting orthodontic adhesive bonding.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Orthodontics

Background:

  • Ceramic brackets are widely used in orthodontics.
  • Understanding their bonding mechanisms is crucial for effective treatment.
  • Variations in bracket design may influence adhesion to orthodontic adhesives.

Purpose of the Study:

  • To investigate the microstructure and bonding mechanisms of four types of ceramic brackets.
  • To identify differences in surface treatments and their impact on adhesion.
  • To correlate bracket base characteristics with bonding strategies.

Main Methods:

  • Utilized polarized-light optical microscopy to examine bracket bases.
  • Employed small area X-ray photoelectron spectroscopy (SAXPS) for surface analysis.

Related Experiment Videos

  • Analyzed bracket composition, structure, and morphology.

    • Main Results:

    • Two bracket types relied solely on micromechanical retention via rough surfaces (microspheres/microcrystals).
    • Two other types featured a silane layer for chemical adhesion, with one also having enhanced micromechanical retention.
    • The silane layer was found to be discontinuous and consistent with gamma-methacryloxypropyl trimethoxysilane.

    Conclusions:

    • Ceramic bracket bases exhibit significant diversity in composition, structure, and surface treatment.
    • These variations lead to distinct bonding mechanisms, influencing adhesion to orthodontic adhesives.
    • Knowledge of these differences is essential for optimizing bracket-orthodontic adhesive interfaces.