Journal Article

Rebonding performance of different ceramic brackets conditioned with a new silane coupling agent

Frank Falkensammer, Erwin Jonke, Michael Bertl, Josef Freudenthaler and Hans Peter Bantleon

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 35, issue 1, pages 103-109
Published in print February 2013 | ISSN: 0141-5387
Published online September 2011 | e-ISSN: 1460-2210 | DOI:
Rebonding performance of different ceramic brackets conditioned with a new silane coupling agent

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The objective of this study was to investigate the rebonding effect of a new silane coupling agent on various ceramic brackets bonded to ceramic specimen. Different ceramic brackets (Fascination 2, Clarity SL, and In-OvationC) were assigned to three groups: rebonding with new silane coupling agent, rebonding with conventional silane coupling agent, or regular bonding as control (n = 16). Bracket adhesion was calculated with a shear test in a universal testing machine. The bracket–composite–ceramic interface was evaluated using the adhesive remnant index score. One-way analysis of variance was applied for inferential statistics. Rebonding with the new silane coupling agent resulted in high shear bond strengths (SBSs; mean values: 37.44–41.24 MPa) and ceramic specimen fractures. Rebonding with the conventional silane coupling agent resulted in significantly (P < 0.001) lower clinically adequate SBS (mean values: 20.20–29.92 MPa) with the least ceramic specimen fractures. Regularly bonded ceramic brackets resulted in clinically adequate to high SBS (mean values: 17.06–41.56 MPa) depending on their bracket base design. Rebonded ceramic brackets showed sufficient SBS to ceramic specimen surfaces. However, increased bracket adhesion was associated with a risk of ceramic specimen surface damage. Therefore, ceramic brackets rebonded with the new silane coupling should be debonded cautiously using alternative debonding methods.

Journal Article.  3296 words.  Illustrated.

Subjects: Restorative Dentistry and Orthodontics

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