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Shear bond strength evaluation of resin composite bonded to glass-ionomer cement using self-etching bonding agents
Deivanayagam Kandaswamy1, Karunamoorthy Jeyavel Rajan, Nagendrababu Venkateshbabu
1Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Sri Ramachandra University, Porur, Chennai, India.
Aim:
To evaluate the bonding ability of composite to unset glass-ionomer cement (GIC) using different self-etching bonding systems.
Materials And Methods:
One hundred samples of composite bonded to unset GIC were prepared and were divided into four groups. In Group A, composite was bonded to unset GIC employing a strong (pH 1) self-etch primer was used. In Group B, intermediary strong (pH 1.4) self-etch primer was employed. In Group C and D, mild (pH 2) and (pH 2.2) self-etch primer was employed. Shear bond strength analysis was performed at a cross-head speed of 0.5 mm/min.
Results:
Statistical analysis performed with one way analysis of variance and Tukey's test showed that the bond strength of composite to unset GIC was significantly higher for the mild self-etch primer group. In addition, energy dispersive x-ray (EDX) analysis was used to determine the composition of various structural phases identified by FE-SEM along the GIC-bonding agent interfaces.
Conclusion:
Hence this present study concludes that clinically the use of mild self-etching bonding agent over unset GIC has improved bond strength compared to the use of strong and intermediate self-etching bonding agent.
