Effects of Self-Etching Adhesive Systems Used in the Dental Modelling Technique on the Cohesive Strength of Composite Resin

This study evaluated the cohesive strength of composite using self-etching adhesive systems (SE) in the lubrication of instruments between layers of composite. The specimens were made by using a Teflon® device. SE were used at the interface to lubricate the instruments: Group 1(G1) – control group, no lubricant was used; Group 2(G2) – Futurabond® M; Group 3(G3) – Optibond® All-In-One; Group 4(G4) – Clearfil® SE Bond; Group 5(G5) – Futurabond® NR; Group 6(G6) – Adper® SE Plus; Group 7(G7) – One Up Bond® F. Specimens were submitted to the tensile test to evaluate the cohesive strength. Data were submitted to the ANOVA and Tukey tests. ANOVA showed a value of p = 0.00. The average means (SD): G2 = 11.33(±3.44) a, G3 = 15.36(±4.06) ab, G4 = 18.9(±4.72) bc, G7 = 19.62(±4.46) bc, G5 = 21.02(±5.09) bc, G6 = 23.39(±4.17) cd, and G1 = 28.49(±2.89) d. All SE decreased the cohesive strength of the composite, except for Adper® SE Plus.