Comparison of Shear Bond Strength of Composite to Amalgam with the Use of Different Bonding Agents
Document Type : مقالههای پژوهشی
Authors
1 Assistant Professor, Department of Operative Dentistry, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran.
2 Postgraduate Student, Department of Operative Dentistry, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran.
3 Dentist. Isfahan, Iran.
Abstract
Materials & Methods: In this in vitro study, 52 acrylic cylinders were made and amalgam containing 43% Ag was condensed into these cylinders. After keeping the amalgam samples at room temperature for 24 hours, the amalgam surfaces were abraded with a diamond bur and all the samples were immersed in an ultrasonic bath. Then the specimens were divided into 4 groups of 13 samples, and each group was treated with different boding agents as follows: group (1), amalgam alloy + primer + total etch (Single Bond); group (2), amalgam alloy + primer + self-etch (G Bond); group (3), amalgam + G Bond; and group (4), amalgam + Single Bond. Composite resin was bonded to prepared amalgam specimens with the use of translucent polyethylene mold and cured by LED Turbo, followed by testing with an Instron machine for shear bond strength. Finally data were analyzed with one-way ANOVA and LSD tests.
Results: In this study, the highest bond strength value was recorded in specimens bonded with G Bond bonding agent (9.06 MPa) and the lowest value was recorded in specimens bonded with Single Bond bonding agent (5.14 MPa). The mean shear bond strength values in 4 groups exhibited statistically significant differences (p value = 0.001).
Conclusion: G Bond bonding agent yielded higher bond strength between amalgam and composite resin than other bonding agents used in this research.
Key words: Amalgam, Composite resin, Shear bond strength.
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