Influence of saliva contamination on the shear bond strength of orthodontic brackets bonded with self-etching adhesive systems.

Autor: Maia SR; Postgraduate student, Department of Dentistry, University of Taubaté, Taubaté, São Paulo, Brazil., Cavalli V, Liporoni PC, do Rego MA
Jazyk: angličtina
Zdroj: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics [Am J Orthod Dentofacial Orthop] 2010 Jul; Vol. 138 (1), pp. 79-83.
DOI: 10.1016/j.ajodo.2008.08.035
Abstrakt: Introduction: Our objective was to evaluate the influence of saliva contamination on the shear bond strength of orthodontic brackets bonded with self-etching primers.
Methods: One hundred thirty-five bovine incisors were randomly divided into 3 groups, and exposed enamel surfaces were bonded with Transbond Plus Self Etching Primer (TB) (3M Unitek, Monrovia, Calif), Adhese Single Bottle (AD) (Ivoclar, Vivadent, Schaan, Liechtenstein), and Self Etch Bond (SE) (Vigodent, Rio de Janeiro, Brazil). Each group was subdivided into 3 treatments (n = 15): saliva contamination (S), saliva contamination and deionized water rinsing (SW), and no salivary contamination (C). Resin composite (Z-100, 3M/ESPE, Salt Lake City, Utah) was applied to all samples to bond the orthodontic brackets. Shear bond strength testing was carried out in a universal testing machine operating at 1.0 mm per minute.
Results: The results were statistically analyzed with 2-way analysis of variance (ANOVA) and Tukey tests (P <0.05). Saliva contamination caused a significant decrease of enamel strength in the groups bonded with TB and SE compared with the SW and C groups. Enamel bond strengths of the C and SW groups were higher than those of the TB group, followed by the AD and SE groups. Enamel bond strength after S was higher than AD, followed by TB and SE.
Conclusions: The shear bond strengths of orthodontic brackets to enamel and the performance of the adhesive systems were influenced by contamination with saliva.
(Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved.)
Databáze: MEDLINE
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