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The European Journal of Orthodontics Advance Access published online on August 31, 2005
The European Journal of Orthodontics, doi:10.1093/ejo/cji032
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© The Author 2005. Published by Oxford University Press on behalf of the European Orthodontics Society. All rights reserved. For permissions, please email: journals.permissions@oupjournals.org.

Article

The effect on shear bond strength of different antimicrobial agents after acid etching

Siddik Malkoc 1*, Abdullah Demir 1, Abdulkadir Sengun 2, and Fusun Ozer 2

1 Departments of Orthodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey
2 Departments of Conservative Dentistry, Faculty of Dentistry, Selcuk University, Konya, Turkey

* To whom correspondence should be addressed.
Siddik Malkoc, E-mail: siddikmalkoc{at}yahoo.com


  Abstract

The aim of the present study was to determine whether the application of different primers containing antibacterial agents (Micro PrimeTM, Seal&ProtectTM, and Gluma DesensitizerTM) can affect the shear bond strength (SBS) of an orthodontic resin composite.

Seventy-two crowns of extracted lower human incisors were mounted in acrylic resin leaving the buccal surface of the crowns parallel to the base of the moulds. The teeth were randomly distributed into three experimental and one control group, each containing 18 teeth. In each experimental group, the primers were applied to the etched enamel surfaces. In the control group, no antibacterial primer was used. An orthodontic composite resin was applied to the surface into cylindrical-shaped plastic matrices after application of an orthodontic adhesive primer (Transbond XT). For shear bond testing, a stubby-shaped force transducer apparatus (Ultradent) was applied at a crosshead speed of 1 mm/minute to each specimen at the interface between the tooth and the composite until failure occurred. A Kruskal-Wallis one-way ANOVA and a Mann-Whitney U-test with a Bonferroni adjustment were used for statistical analysis.

There was no significant difference between Seal&ProtectTM (27.98 ± 8.73 MPa) and the control (35.15 ± 7.85 MPa) (P > 0.05). However, GlumaTM (21.61 ± 7.96 MPa) and Micro PrimeTM (14.89 ± 5.55 MPa) caused a decrease in bond strength (P < 0.05). No statistically significant difference was observed between Seal&ProtectTM and GlumaTM (P > 0.05).

As triclosan containing Seal&ProtectTM did not cause a significant decrease in bond strength, it can potentially be used under an orthodontic resin composite to obtain an antibacterial effect. However, further in vivo studies are required.


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