Shear bond strength of three solvent-containing adhesive with different bulk fill composites

Abstract

The aim of this study was to compare, under varying conditions, the dentin shear bond strength (SBS) of three solvent-containing (acetone, ethanol, and water) self-etch adhesive with acetone-containing self-etch adhesive and ethanol/water-containing self-etch adhesive. One-hundred non-carious molar teeth were divided into 10 groups of ten specimens each. Kerr Optibond All-In-One (containing acetone, ethanol, and water), Ivoclar Tetric N-Bond Universal (containing ethanol and water), and Shofu BeautiBond (containing acetone) were used as adhesives. The comparisons were made only between adhesives containing common solvents. Three bulk-fill resin composites, Kerr Sonicfill 2, Ivoclar Tetric N-Ceram Bulk Fill, and Shofu Beautifil-Bulk, were chosen for preparation of two-millimeter blocks of composites. Specimens were tested in a universal testing machine (Shimadzu, Japan) in shear to failure at 0.5 mm/min. The shear bond strengths were tested under two conditions: immediately and after 10,000 thermal cycling. The mean values were compared using analysis of variance (ANOVA]. A significance level of p < 0.05 was used in all tests. Failures were categorized into four classes: adhesive failure, cohesive failure in dentin, cohesive failure in the composite, and mix-type failure. Tetric N-Ceram Bulk Fill + Tetric N-Bond Universal showed the highest SBS values both two conditions. The megapascal pressure unit (MPa) was 19.38 (± 3.06) in immediate group, while the MPa after thermocycle aging was 10.68 (± 2.5]. The SBS of three solvent-containing adhesives was not affected by the content of bulk-fill composites. After thermal aging, there was a significant decrease in the SBS of all groups.

Keywords:

• Adhesion
• composite
• adhesive
• shear bond strength
• themocycle

Acknowledgement

The authors would like to thank the Marmara University Scientific Research Projects Commission (Project No.: SAG-C-DUP-120917-0507) for its financial support.

Ethical approval

This in vitro study has been approved by the appropriate ethics committee (Marmara University, Faculty of Dentistry, Istanbul, Turkey; approval no. 2017-84].

Informed consent

Not applicable.

Disclosure statement

The authors declare that they have no conflict of interest.

Additional information

Funding

This study was supported by Marmara University Scientific Research Projects Commission (BAPKO]. Project no: SAG-C-DUP-120917-0507.