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Related Experiment Videos

Effect of using self-etching primer for bonding orthodontic brackets.

Rieko Yamada1, Tohru Hayakawa, Kazutaka Kasai

  • 1Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan.

The Angle Orthodontist
|January 10, 2003
PubMed
Summary

Self-etching primers show comparable shear bond strength with resin-modified glass ionomer cements for orthodontic bracket bonding. However, they yield lower strength with composite resins compared to phosphoric acid etching, potentially minimizing enamel loss.

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Area of Science:

  • Orthodontic dentistry
  • Dental materials science
  • Adhesive dentistry

Background:

  • The efficacy of self-etching primers with composite resin adhesives for orthodontic bracket bonding remains debated.
  • Limited research exists on self-etching primers combined with resin-modified glass ionomer cements in orthodontics.

Purpose of the Study:

  • To evaluate the shear bond strengths of orthodontic brackets bonded using four different protocols.
  • To compare the enamel surface morphology after etching or priming using field-emission scanning electron microscopy (FE-SEM).

Main Methods:

  • Four bonding protocols were tested: composite resin with phosphoric acid, composite resin with Megabond self-etching primer, resin-modified glass ionomer cement with polyacrylic acid, and resin-modified glass ionomer cement with Megabond self-etching primer.

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  • Shear bond strength was measured for all groups.
  • Enamel surface changes were analyzed using FE-SEM.

    • Main Results:

    • Megabond self-etching primer showed no significant difference in shear bond strength compared to polyacrylic acid when used with resin-modified glass ionomer cement.
    • Using Megabond self-etching primer with composite resin resulted in significantly lower shear bond strength than phosphoric acid etching.
    • Shear bond strength with composite resin and Megabond primer was comparable to resin-modified glass ionomer cement with polyacrylic acid.
    • FE-SEM revealed less enamel surface dissolution with Megabond self-etching primer compared to phosphoric and polyacrylic acid.

    Conclusions:

    • Megabond self-etching primer may be suitable for bonding orthodontic brackets with resin-modified glass ionomer cement.
    • This combination has the potential to minimize enamel loss during bracket debonding.
    • Further research is needed to fully elucidate the clinical implications of using self-etching primers in orthodontic bonding.