Evaluation of compatibility between different types of adhesives and dual-cured resin cement.
OBJECTIVE
The objective of this in vitro study was to evaluate the bonding compatibility between different adhesives and a dual-cured resin cement, using a conventional tensile bond test.


METHODS
The adhesives used were: Prime & Bond (PB) (Dentsply) (PB), Scotchbond Multi Purpose (SB) (3M), and the activator Self Cure (SC) (Dentsply). The dual-curing resin cement used was Enforce (EF) (Dentsply). Six groups with five specimens in each were tested: G1: EF/PB/EF (light cured); G2: EF/SB/EF (light cured); G3: EF/PB+SC/EF (light cured); G4: EF/PB+SC/EF (only chemically cured); G5: EF/EF (light cured); G6: EF/EF (only chemically cured). The resin cement was applied in two stainless steel molds with a cone-shaped perforation measuring 4 mm in diameter and 1 mm in thickness, and the adhesive was applied between them. Ten minutes after specimens were cured, the tensile strength was measured in a universal testing machine at a crosshead speed of 0.5 mm/min.


RESULTS
The mean values (MPa) +/- SD obtained in each experimental group were: G1: 1.4 +/- 0.2; G2: 1.3 +/- 0.2; G3: 1.2 +/- 0.4; G4: 0.8 +/- 0.2; G5: 1.2 +/- 0.1; G6: 0.7 +/- 0.1. The results were statistically evaluated using nonparametric Kruskal-Wallis and Dunn tests (p < or = 0.05). Statistically significant differences among groups were found only between G1 and G4, and G1 and G6.


CONCLUSIONS
There was no incompatibility among the different adhesives used with dual-cured resin cement. The lowest tensile bond strength values occurred in the absence of photoactivation.
Franco
Eduardo B
EB
Department of Operative Dentistry, Endodontics and Dental Materials, Bauru Dental School, University of São Paulo, SP, Brazil. ebfranco@fob.usp.br
Lopes
Lawrence G
LG
D'alpino
Paulo H P
PH
Pereira
José C
JC
Mondelli
Rafael F L
RF
Navarro
Maria F L
MF
D000096:Acetone / Q000737:chemistry; D000269:Adhesives / Q000737:chemistry*; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004344:Drug Incompatibility; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D000269:Adhesives; D017220:Dentin-Bonding Agents; C103503:EnForce-Sure Cure; D011109:Polymethacrylic Acids; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C474194:Self Cure adhesive; C444444:prime and bond 2.1; D000096:Acetone