Evaluation of the Effect of Different Contaminants on the Shear Bond Strength of a Two-step Self-etch Adhesive System, One-step, Self-etch Adhesive System and a Total-etch Adhesive System

Background: Adhesive procedures have become an integral part of today’s restorative dental procedures. This study was carried out to evaluate the effect of contaminants such as saliva, blood, and hemostatic agents on the shear bond strength of a self-etch adhesive system Clearfil SE Bond, one-step, self-etch adhesive system AdperTM Easy One and a total-etch adhesive system AdperTM Single Bond 2. Materials and Methods: A total of 111 extracted sound human molars were collected and divided into 5 groups for each of the 3 bonding agents. For each adhesive, specimens were divided as follows 5 teeth (control group), 8 teeth contaminated by saliva, 8 teeth contaminated by blood, 8 teeth where Viscostat was used, 8 teeth where Viscostatclear was used. For the control group of Groups I, II, and III adhesive application was done directly followed by composite build-up. Specimens in each group were tested in shear mode using a chisel-shaped rod in a universal testing machine at a cross head speed of 0.05 cm/min. The data for each group was subjected to one-way ANOVA followed by Studentized Newman– Keuls test to make comparisons among the groups. Results: The total-etch adhesive system AdperTM Single Bond 2 showed better bond strength when compared to the one-step self-etch adhesive system, Adper Easy One and self-etch two-step adhesive system, Clearfil SE when contaminants like saliva, blood, hemostatic agents are used. Conclusion: When bonding to contaminated surfaces the totaletch system, AdperTM Single Bond 2 showed better results when compared to the one-step self-etch adhesive system Adper Easy One and self-etch two-step adhesive system, Clearfil SE.