Dentin Shear Bond Strengths of Self-etch Adhesives

Objective: The aim of this study is to compare the dentin shear bond strengths (SBS) of self-etch adhesives. Methods: 40 extracted non-carious molar teeth were mounted in acrylic resin; flat facial dentin surfaces were prepared and polished to 600 grit to with SiC discs. Teeth were randomly assigned to 4 groups of 10 teeth each: Group 1:Silorane System Adhesive(3M Espe), Group 2:Clearfil S3 Bond(Kuraray Co Ltd.), Group 3:G-Bond (GC America Inc.), Group 4:Adhese (Ivoclar Vivadent Inc.). All adhesives were applied according to the manufacturers' instructions; 3.5 x 2.0mm cylindrical molds filled with the respective composites were placed over the adhesive and light cured. Specimens stored in distilled water for 24 hours were then subjected to SBS test in an Instron Universal Testing machine at a crosshead speed of 1 mm/min. SBS data in MPa was statistically analyzed by one-way ANOVA and Tukey-Kramer Multiple Comparisons tests. Results: Mean+SD values (MPa): Group 1:19.17±7.01, Group 2: 18.74±5.09, Group 3: 14.36± 4.67, Group 4: 12.78±3.60. A significant difference(p<0.05) was determined between Group 1 and Group 4. No significant differences (p>0.05) were found between the other groups. Conclusions: The self-etch adhesives have demonstrated comparable dentin SBS values; Silorane System Adhesive has exhibited the highest, Adhese has generated the lowest mean bond strengths among the self-etch adhesives tested.