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Article
Shear Bond Strength Comparison between Two Orthodontic Adhesives and Self-Ligating and Conventional Brackets
The Angle Orthodontist
  • Rodney G. Northrup, Marquette University
  • David W. Berzins, Marquette University
  • T. Gerard Bradley, Marquette University
  • William I. Schuckit, Marquette University
Document Type
Article
Language
eng
Format of Original
6 p.
Publication Date
7-1-2007
Publisher
The E. H. Angle Education and Research Foundation Inc.
Original Item ID
doi: 10.2319/022406-79
Disciplines
Abstract

Objective: To evaluate and compare the shear bond strengths of two adhesives using two types of brackets: a conventional and a self-ligating bracket system.

Materials and Methods: Sixty extracted human premolars were collected. The premolars were randomly divided into three groups of 20 teeth. All three groups were direct bonded. Groups 1 and 2 used light-cured adhesive and primer (Transbond XT) with a conventional (Orthos) and a self-ligating bracket (Damon 2), respectively. Group 3 used a light-cured primer (Orthosolo) and a light-cured adhesive (Blūgloo) with a self-ligating bracket (Damon 2). The specimens were stored in distilled water at 37°C for 40 ± 2 hours, after which they were debonded and inspected for Adhesive Remnant Index (ARI) scoring.

Results: The mean shear bond strength was 15.2 MPa for group 1, 23.2 MPa for group 2, and 24.8 MPa for group 3. A one-way analysis of variance and post hoc Tukey test showed significant differences in bond strength (P < .001) between group 1 and groups 2 and 3 but no significant difference (P > .05) between groups 2 and 3. A Weibull analysis demonstrated that all three groups provided sufficient bond strength with over 90% survival rate at normal masticatory and orthodontic force levels. A Kruskal-Wallis test showed no significant difference (P > .05) in ARI scores among all three groups.

Conclusions: All three groups demonstrated clinically acceptable bond strength. The Damon 2 self-ligating bracket exhibited satisfactory in vitro bond strength with both adhesive systems used.

Comments

Published version. The Angle Orthodontist, Vol. 77, No. 4 (July 2007): 701-706. DOI. © The E. H. Angle Education and Research Foundation Inc., 2007. Used with permission.

Citation Information
Rodney G. Northrup, David W. Berzins, T. Gerard Bradley and William I. Schuckit. "Shear Bond Strength Comparison between Two Orthodontic Adhesives and Self-Ligating and Conventional Brackets" The Angle Orthodontist (2007) ISSN: 0003-3219
Available at: http://works.bepress.com/t_bradley/10/