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Related Experiment Videos

Direct bonding to Adlloy-treated amalgam

M W Gross1, T F Foley, A H Mamandras

  • 1Division of Graduate Orthodontics, University of Western Ontario, London, Canada.

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
|September 19, 1997
PubMed
Summary

Modifying amalgam surfaces with Adlloy (a gallium-tin liquid alloy) enhanced the bond strength of orthodontic brackets when using the C&B Metabond adhesive system. However, Adlloy did not improve bonding with the Concise resin system.

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Area of Science:

  • Dental Materials Science
  • Orthodontic Bonding
  • Adhesive Dentistry

Background:

  • Amalgam restorations are common in dentistry.
  • Bonding orthodontic brackets to amalgam surfaces presents challenges.
  • Improving the bond strength and reliability of bracket adhesion to amalgam is clinically significant.

Purpose of the Study:

  • To evaluate the effect of Adlloy (gallium-tin liquid alloy) surface modification on the bond strength of orthodontic brackets bonded to amalgam.
  • To compare the performance of two resin systems (Concise and C&B Metabond) with and without Adlloy treatment.

Main Methods:

  • Class V amalgam restorations were treated with sandblasting or sandblasting plus Adlloy.
  • Orthodontic brackets were bonded using Concise composite resin or C&B Metabond adhesive.

Related Experiment Videos

  • Specimens underwent water storage and thermocycling before shear bond strength testing.

    • Main Results:

    • Adlloy treatment did not improve the bond strength of Concise resin to amalgam.
    • Adlloy treatment significantly increased the shear bond strength when using C&B Metabond.
    • Bond failures shifted from the amalgam-adhesive interface to within the adhesive with Adlloy and C&B Metabond.
    • Fracture within the amalgam was observed during debonding with C&B Metabond.

    Conclusions:

    • Adlloy surface modification can enhance orthodontic bracket bonding to amalgam when using C&B Metabond.
    • C&B Metabond provides adequate bonding to amalgam, but potential amalgam fracture risk exists upon debonding.
    • Concise resin bonding to amalgam is not improved by Adlloy treatment.