Objective: The aim of this present study was to determine whether the application of different antibacterial agent containing primers (Micro PrimeTM, Seal Protect, and Gluma Desensitizer) can affect the shear bond strength of an orthodontic resin composite.

Methods:Seventy two crowns of extracted lower human incisors were mounted in acrylic resin by leaving their vestibule faces parallel to the base of the molds. The teeth were randomly divided into three experimental groups and one control group, each containing 18 teeth. In each experimental group, the primers were applied to the etched enamel surfaces. In control group, antibacterial primer was not used. An orthodontic composite resin(Transbond XT,3M Unitek)was applied to the surface into cylindrical shaped plastic matrixes after an orthodontic bonding agent (Transbond XT, 3M Unitek) application. For shear bond testing a stubby-shape apparatus (Ultradent, USA) was applied at a cross head speed of 1 mm/min to each specimen at interface between tooth and composite until failure occurred. Kruskal Wallis one way ANOVA and Mann Whitney-U with a Bonferroni adjustment test were used for statistical analysis.

Results: There was no significant difference between the bond strength values of Seal&Protect (27.98±8.73) and control (35.15±7.85) groups (p>0.05). However, Gluma (21.61±7.96) and Microprime (14.89±5.55) caused a decrease in bond strength of the orthodontic bonding agent(p<0.05).

Conclusion: Since triclosan containing Seal&Protect did not cause any change in bond strength, it is advisable to use it under orthodontic resin composites to get benefit from its antibacterial effect.

Back to the Dental Materials: I - Adhesion-Composite Bond Strength Program
Back to the IADR/AADR/CADR 82nd General Session (March 10-13, 2004)

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