2011 Volume 54 Issue 6 Pages 448-465
In the mid-1970s, adhesive systems (phosphoric acid etching/unfilled resin) exhibited poor resin bonding to dentin instead of good bonding to enamel, leading to occasional pulpal irritation. To avoid such reactions, glassionomer cements (GIC) were sometimes placed on the dentinal walls. In deep cavities with a large volume, GICs were also placed as a dentin substitute to control polymerization shrinkage. This so-called "Sandwich Technique" is still adopted, even though the development of liner/base materials has progressed dramatically. However, resin bonding to these recent materials is unknown. The aim of this study was to examine resin bonding to recent liner/base materials conditioned by self-etching priming systems. A conventional high-strength GIC (FujiIXGP, GC), two resin-modified GICs (Fuji Lining LC, GC and Vitre Bond, 3M ESPE) and a flowable composite (MI Flow, GC) were used as liner/base materials with four self-etching priming adhesives, a phosphoric acid or a silane coupling agent. Under the conditions of the present study, excellent adhesive properties were obtained between resin and self-etching primed GIC or resin-modified GICs. Phosphoric acid etching and/or silane coupling inhibited resin bonding to GICs under certain conditions, which require special attention.
