Bond Strength and Interfacial Micromorphology of Etch‐and‐Rinse and Self‐Adhesive Resin Cements to Dentin

Abstract

The particular interaction of each cement with dentin results in specific bond strength and failure patterns that varied among groups in both evaluation times. Even though the self-adhesive cement tested exhibited no authentic hybrid layer, it was able to promote reliable adhesion with the underlying dentin.

Tensile Bond Strength of Self Adhesive Resin Cement After Various Surface Treatment of Enamel

“…Accordingly, self-etching systems could promote a mild, moderate or aggressive etching pattern on intact enamel, depending on the acidic dissociation constants (pka values) of their acidic monomers and the concentration of these monomers in the adhesives. This was supported by Vaz et al, in which application of bonding agent increases the bond strength as compared with untreated enamel [46]. Similar results were reported by Lin et al, in which application of G-bond results in higher bond strength as compared with untreated enamel surface [23].…”

Micro-shear bond strength of adhesive resins to enamel at different relative humidity conditions

“…The humid conditions did not affect the bond strength in Group AEB. It was reported that excess water may influence the mechanical properties of adhesive layer of the one-step self-etch adhesives by inhibiting the optimal polymerization of the monomers 32,33) . Beside a significant difference about μSBS values in Group AEB from the other groups, an adequate bonding quality of AEB could also not be observed in the SEM findings.…”

“…Ethanol is added into the agent as solvent to accelerate water elimination 31) . As mentioned above, if the ratio of the water to solvent in the chemical composition increases, the degree of polymerization is negatively affected 32,33) . The humid conditions did not affect the bond strength in Group AEB.…”

Bond strength of self-adhesive resin cements to dry and moist dentin

“…According to the manufacturers, the functional monomers are able to bond chemically the calcium from hydroxyapatite, which is one of the bonding mechanisms responsible for the retention of the restoration. [4][5][6] However, little information is available about these chemical reactions, and the durability of this bonding requires further investigation, since clinicians have switched from conventional resin cement to these new self-adhesive resin cements. [7][8][9] Declaration of Interests: The authors certify that they have no commercial or associative interest that represents a conflict of interest in connection with the manuscript.…”