IADR Abstract Archives
Bonding Effectiveness of the Eighth Generation Bonding System Containing Nanofillers to Enamel and Dentin
Objectives: Objective: The aim of this in-vitro comparative study was to evaluate shear bond strength to enamel and dentin of eighth generation bonding system containing nano-fillers comparing with fifth generation bonding agent, and universal adhesive.
Methods: Methods: 90 freshly extracted intact human premolars were used in this study and divided into two groups (45 for enamel bonding study and 45 for dentin bonding study), the root was cut, crown parts were placed in self-cure acrylic resin mold, then the buccal surfaces were flatted to provide enamel and dentin surfaces parallel to acrylic surface. Each group randomlydivided into three groups according to the dentin adhesive used (n=15), Group I: 8th generation dentin adhesives-Futurabond, DC, Voco, Germany, Group II: Universal Adhesive-Single Bond Universal, 3M ESPE with total-etch mode in enamel and self-etch mode in dentin, and Group III: 5th generation dentin bonding agent- Adper Single Bond2, 3M ESPE.Dentin bonding materials were applied according to the manufacturer instruction then composite was applied by using a Teflon mold with a 3 mm bonding diameter. Specimens were stored in distilled water (37 οC / 7 days). After thermo cycling (500 cycles, 5-55 οC), shear bond strength was measured using 'TesT 114' Machine at a crosshead speed of 0.5 mm/min.
Results: Results were statistically analyzed using SPSS program edition 22 by independent T student, one-Way ANOVA and Bonferroni tests at significance level (α=0.05).
Results:In enamel, Adper Single Bond2 and Single Bond Universal demonstrated significantly higher bond strength than that of Futurabond DC P< 0.05, there wasn't any significant difference between Adper Single Bond2 and Single Bond UniversalP>0.05. In dentin, there were no significantly differences among all adhesives p>0.05.The bond strength in enamel was higher than that observed in dentin and the difference was significant in Futurabond DC P<0.05.
Conclusions: Conclusion: This study showed that the eighth generation has a strong bonding to dentin similar to Universal Adhesive and fifth generation, while the eighth generation didn't show an increase in the bonding to enamel compared to the Universal adhesive and fifth generation bonding agent.
Methods: Methods: 90 freshly extracted intact human premolars were used in this study and divided into two groups (45 for enamel bonding study and 45 for dentin bonding study), the root was cut, crown parts were placed in self-cure acrylic resin mold, then the buccal surfaces were flatted to provide enamel and dentin surfaces parallel to acrylic surface. Each group randomlydivided into three groups according to the dentin adhesive used (n=15), Group I: 8th generation dentin adhesives-Futurabond, DC, Voco, Germany, Group II: Universal Adhesive-Single Bond Universal, 3M ESPE with total-etch mode in enamel and self-etch mode in dentin, and Group III: 5th generation dentin bonding agent- Adper Single Bond2, 3M ESPE.Dentin bonding materials were applied according to the manufacturer instruction then composite was applied by using a Teflon mold with a 3 mm bonding diameter. Specimens were stored in distilled water (37 οC / 7 days). After thermo cycling (500 cycles, 5-55 οC), shear bond strength was measured using 'TesT 114' Machine at a crosshead speed of 0.5 mm/min.
Results: Results were statistically analyzed using SPSS program edition 22 by independent T student, one-Way ANOVA and Bonferroni tests at significance level (α=0.05).
Results:In enamel, Adper Single Bond2 and Single Bond Universal demonstrated significantly higher bond strength than that of Futurabond DC P< 0.05, there wasn't any significant difference between Adper Single Bond2 and Single Bond UniversalP>0.05. In dentin, there were no significantly differences among all adhesives p>0.05.The bond strength in enamel was higher than that observed in dentin and the difference was significant in Futurabond DC P<0.05.
Conclusions: Conclusion: This study showed that the eighth generation has a strong bonding to dentin similar to Universal Adhesive and fifth generation, while the eighth generation didn't show an increase in the bonding to enamel compared to the Universal adhesive and fifth generation bonding agent.
