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Shear Bond Strength Comparison between Two Orthodontic Adhesives and Self-Ligating and Conventional Brackets.

Authors :
Northrup, Rodney G.
Berzins, David W.
Bradley, Thomas Gerard
Schuckit, William
Source :
Angle Orthodontist; Jul2007, Vol. 77 Issue 4, p701-706, 6p, 1 Black and White Photograph, 3 Charts, 1 Graph
Publication Year :
2007

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 (BlÅ«gloo) 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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00033219
Volume :
77
Issue :
4
Database :
Supplemental Index
Journal :
Angle Orthodontist
Publication Type :
Academic Journal
Accession number :
43233567
Full Text :
https://doi.org/10.2319/022406-79