Compatibility between an all-in-one self-etching adhesive and a dual-cured resin luting cement.
OBJECTIVE
To determine if bonding incompatibility between a single-step self-etching adhesive and a dual-cured luting cement is prevented by addition of deprotonizing anion exchange resin powder to the amine component of the resin cement.


METHODS
iBond adhesive (IBO) (Heraeus Kulzer) and the dual-cured resin cement Twinlook (TWI) (Heraeus Kulzer) were used with base pastes, containing 0, 1, 2, and 4 wt% anion exchange resin (AER) in OH- form. Conventional shear bond strength (SBS) was determined on human dentin. After application of IBO, a cylindrical mold was clamped on the treated surface and bulk filled with TWI. SBS was measured after 24 h in 37degrees C water at a crosshead speed of 1 mm/min. The following curing protocols were investigated: Group 1: IBO not light cured, TWI redox cured; group 2: IBO light cured, TWI redox-cured; group 3: IBO light cured, TWI dual cured (n=8). The data were statistically analyzed using ANOVA and Duncan's post-hoc test at alpha < 0.05.


RESULTS
The mean SBSs (MPa) with original TWI in groups 1, 2, and 3 were 12.7aA, 16.4bA, and 24.7cA. The corresponding figures for 1% AER were: 16.6aB, 23.0bB, 22.8bA; for 2% AER: 16.8aB, 22.6abB, 24.6bA; and for 4% AER: 16.2aAB, 22.5bB, 24.7bA. Different small and capital letters denote significant differences by treatment group and by AER content, respectively.


CONCLUSIONS
Addition of anion exchange resin to the amine component of the dual-cured resin cement enhances the bond strength to dentin upon redox curing by prevention of amine neutralization through functional acid monomers from an all-in-one adhesive, mainly when the adhesive or the luting cement were not light cured.
Kanehira
Masafumi
M
Graduate School of Dentistry, Department of Restorative Dentistry, Division of Operative Dentistry, Tohoku University, Sendai, Japan.
Finger
Werner J
WJ
Hoffmann
Marcus
M
Komatsu
Masashi
M
D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003804:Dentin / Q000737:chemistry*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004347:Drug Interactions; D006801:Humans; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength
D017220:Dentin-Bonding Agents; D019279:Resin Cements; C086630:TwinLook cement; C477386:iBond; D017438:Bisphenol A-Glycidyl Methacrylate