IADR Abstract Archives
Bonding Property of Resin Cement to Tooth Without Curing Light
Objectives: Bonding property of resin cement to tooth substrate is important for long-term durability of restorations. In general, it is thought that adequate curing of resin cement is important for stable performance, especially on dentin. But some opaque-shaded restorations may weaken light irradiation for resin cement, so self-curing ability is also important for resin cement to be applied for any type of shaded restorations. The aim of this study was to evaluate the bonding property of several resin cement systems to enamel and dentin in self-cure mode.
Methods: Three resin cement systems (G-CEM ONE and G-CEM ONE Adhesive Enhancing Primer (GCO, GC), RelyX Universal and Scotchbond Universal Plus Adhesive (RXU, 3M) and PANAVIA V5 and PANAVIA V5 Tooth Primer (PV5, Kuraray)) were used in this study. Specimens of bovine anterior tooth enamel or dentin were embedded with acrylic resin. Exposed flat surface was finished with 600-grit SiC paper. Bonding area (3.0mm-diameter) and cement thickness (0.1mm-thickness) were defined by plastic-sticker. Alumina-sand-blasted stainless-steel-rod was adhered to tooth according to the manufacturer’s instructions. Half of specimens were stored at 37oC 100%R.H. for 1hour and then stored in water at 37oC for 23hours (24h). Another half was stored 24h condition and then placed under thermocycling condition (5-55oC for 5000cycles, TC5000). SBS was measured by SHIMADZU AG-IS [Crosshead-speed 1mm/min, n=5, statistically analyzed (2-way ANOVA followed by Tukey post-hoc test, α=0.05)].
Results: Excluding RXU of TC5000, there were no significant differences in SBS to enamel among the resin cement systems. On the other hand, regarding SBS to dentin, GCO showed higher values than the other resin cement systems in both conditions and similar bonding performance with enamel.
Conclusions: GCO showed excellent bonding property to tooth substrate in self-cure mode. This suggests that GCO provides reliable adhesion regardless of restoration type and curing light intensity.
Methods: Three resin cement systems (G-CEM ONE and G-CEM ONE Adhesive Enhancing Primer (GCO, GC), RelyX Universal and Scotchbond Universal Plus Adhesive (RXU, 3M) and PANAVIA V5 and PANAVIA V5 Tooth Primer (PV5, Kuraray)) were used in this study. Specimens of bovine anterior tooth enamel or dentin were embedded with acrylic resin. Exposed flat surface was finished with 600-grit SiC paper. Bonding area (3.0mm-diameter) and cement thickness (0.1mm-thickness) were defined by plastic-sticker. Alumina-sand-blasted stainless-steel-rod was adhered to tooth according to the manufacturer’s instructions. Half of specimens were stored at 37oC 100%R.H. for 1hour and then stored in water at 37oC for 23hours (24h). Another half was stored 24h condition and then placed under thermocycling condition (5-55oC for 5000cycles, TC5000). SBS was measured by SHIMADZU AG-IS [Crosshead-speed 1mm/min, n=5, statistically analyzed (2-way ANOVA followed by Tukey post-hoc test, α=0.05)].
Results: Excluding RXU of TC5000, there were no significant differences in SBS to enamel among the resin cement systems. On the other hand, regarding SBS to dentin, GCO showed higher values than the other resin cement systems in both conditions and similar bonding performance with enamel.
Conclusions: GCO showed excellent bonding property to tooth substrate in self-cure mode. This suggests that GCO provides reliable adhesion regardless of restoration type and curing light intensity.