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Related Experiment Videos

Titanium orthodontic brackets: structure, composition, hardness and ionic release.

Christiana Gioka1, Christoph Bourauel, Spiros Zinelis

  • 1Biomaterials Laboratory, School of Dentistry, University of Athens, Greece.

Dental Materials : Official Publication of the Academy of Dental Materials
|July 9, 2004
PubMed
Summary

This study compared two titanium orthodontic brackets, Orthos2 and Rematitan. Orthos2 showed significant hardness differences between its parts and released aluminum and vanadium, unlike Rematitan.

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Area of Science:

  • Materials Science
  • Biomaterials Engineering
  • Orthodontics

Background:

  • Titanium orthodontic brackets are widely used due to their biocompatibility and mechanical properties.
  • Understanding the material characteristics of different bracket brands is crucial for predicting clinical performance and biological response.

Purpose of the Study:

  • To investigate and compare the composition, morphology, bulk structure, and ionic release of Orthos2 and Rematitan titanium orthodontic brackets.
  • To evaluate potential differences in material properties that could affect orthodontic treatment outcomes.

Main Methods:

  • Computerized X-ray microtomography was used to analyze bracket morphology and structure.
  • Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS) and Vickers microhardness testing were performed.

Related Experiment Videos

  • Ionic release was measured using Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) after immersion in saline.

    • Main Results:

    • Orthos2 brackets (Ti-6Al-4V alloy wings, CP Ti grade II base) exhibited significant hardness variations between base and wings, with laser-welded interfaces.
    • Rematitan brackets (CP Ti grade IV) showed uniform hardness across base and wings, with a laser-etched mesh pad.
    • Both released minimal titanium; Orthos2 released trace amounts of aluminum and vanadium, while Rematitan did not.

    Conclusions:

    • Structural and hardness disparities in Orthos2 brackets may impact torque transfer and crevice corrosion potential.
    • The presence of aluminum and vanadium in the immersion medium from Orthos2 suggests a potentially different biological response compared to Rematitan brackets.