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Simultaneous activation technique: an alternative for bonding composite resin to glass ionomer
Sérgio Luiz Pinheiro1, Margareth Oda, Edmir Matson
1Metropolitan University of Santos and PUC-Campinas, Brazil. slpinho@hotmail.com
Purpose:
The purpose of this study was to evaluate a new simultaneous activation technique (SAT)-for the union between glass ionomer cements and composite resins.
Methods:
Forty primary molars were embedded in self-curing acrylic resin. Class I cavity preparations were performed on the dentin surface and the teeth were randomly divided into 4 groups (N = 10). Two groups were restored with the SAT and 2 by etching the ionomer surface/sandwich technique (ST). The materials tested were Vidrion F (SS/ White), Vitremer (3M), and Z100 (3M). After 24 hours in aqueous solution at 37 degrees C, a tensile test was performed. The microleakage study was also performed by selecting 40 primary molars which were distributed in the same way as in the bond strength test. Furthermore, 1 tooth from each group of the microleakage test was evaluated by means of scanning electron microscopy.
Results:
The SAT and ST did not show statistically significant differences in both tests.
Conclusions:
The SAT is a less complex, quicker, and feasible alternative for the bonding of glass ionomer cements to composite resins in primary molars.