Effect of Surface Treatments of Resin Composite Core Material on Shear Bond Strength of Self Etching Resin Cement
The purpose of this study was to evaluate the effects of surface treatments on shear bond strength between self-etching resin cement and resin composite core material. Eighty pairs of unequal sized cylindrical specimens (Ø5x5, Ø7x5 mm.) were made from resin composite core material (Clearfil Photo Core) and randomly divided into four surface treatment groups of twenty each as following; 1) no surface treatment, 2) ED primer II, 3) silanation and ED primer II, 4) sandblasting, silanation and ED primer II. Following identical treatment to one side of cylinders in each pair, they were bond with self-etching resin cement (Panavia F 2.0) had been bonded to specimen surfaces before shear bond strength tests were performed. The result of this study revealed that the highest mean shear bond strength was achieved for the group 4. The untreated surface group 1 showed the lowest mean bond strength but no significant difference was found when compared to those with ED primer II. In conclusion of this study, sandblasting, silanation and ED primer II group was the highest among the group tested. ED primer II was not effective for improving the shear bond strength.
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