Year : 2020

Volume : Volume 11

Issue : Issue 2

Address for correspondence :
Dr. Rosaiah Kanaparthy.
drrosaiah@gmail.com

Abstract

Background:  To compare and evaluate the micro tensile bond strength of two step Optibond S and one step G Bond adhesive systems to dentin in vitro. Material and Method: Thirty intact, non-carious and unrestored human premolars were taken for the microtensile bond study and divided into 2 groups of 15 each. The teeth were embedded in acrylic resin and the occlusal enamel was removed perpendicular to their long axis, to expose a flat, midcoronal dentin surface.  Group A:15 teeth bonded using two step bonding agent-Optibond S (Kerr). Group B:15 teeth bonded using a single step bonding agent-G-bond (GC Corporation). Bonding agents were applied according to the manufacturer’s instructions and resin composite was built up incrementally to a height of 5 mm. These teeth were mounted onto a custom acrylic jig and subjected to micro tensile bond strength testing using a Universal Testing Machine with a cross head speed of 1 mm/min and stressed to de-bonding of the composite resin from the tooth. Results: Results obtained were subjected to statistical analysis and evaluated by using Tukey HSD test. The mean bond strengths for both groups were as follows. Group  A  (optibond S) was 84.748 MPa and group B (G bond)was 55.226 MPa.  Conclusion: The results established that the microtensile bond strength of optibond S is better than G bond. Difference obtained was found to be statistically non-significant with P = 0.116.

Keywords: Adhesive, Bonding, Microtensile bond strength, 2-step adhesive, 1-step adhesive.