IADR Abstract Archives
Evaluation of Three Universal Adhesives for Bonding to Enamel and Dentin
Objectives: This in vitro study aimed to evaluate the shear bond strength (SBS) of three universal adhesives to enamel and dentin in different etching modes.
Methods: The crowns of 120 human incisor teeth were separated from the roots and embedded in acrylic resin in silicon models. To prepare dentin and enamel surfaces for bonding, buccal surfaces were transformed flat-ground with 600-1000-2500-4000-grit SiC papers. The teeth were distributed into 12 groups. Universal adhesives (G-aenial Bond/GC, Clearfil Universal Bond/Kuraray and Single Bond Universal/3M ESPE) were tested in both self-etch and etch-and-rinse modes on enamel and dentin (n=10). All adhesives were used according to manufacturers’ instructions. A stainless steel metal ring with an internal diameter of 2-mm was used to bond the composite (A2-enamel, Filtek Ultimate/3M ESPE) to the tooth surfaces. SBS tests were performed by using a universal testing machine (Instron Corporation/Canton) (1 mm/min) after 21-days of storage in distilled water. The percentages of failure modes (adhesive-cohesive-mixed) were also evaluated. Data were analyzed with t-test and one-way ANOVA and Bonferroni tests (p=0.05).
Results: The SBS values were not affected by the adhesives and by their application modes in enamel (p>0.05). G-aenial Bond in etch-and-rinse mode showed significantly lower SBS than its self-etch mode (p=0.022), and Clearfil Universal Bond in etch-and-rinse mode (p=0.03) in dentin. The SBS of adhesives to dentin in self-etch mode did not show statistically differences (p=0.160). Generally adhesive failures were observed in both modes for all adhesives.
Conclusions: With regard to the adhesive systems used in this study, universal adhesives showed similar enamel bond strengths in both etching modes whereas etch-and-rinse mode could affect the bond strength to dentin. The influence of different etching modes of universal adhesives was found to be dependent on the adhesive material.
Methods: The crowns of 120 human incisor teeth were separated from the roots and embedded in acrylic resin in silicon models. To prepare dentin and enamel surfaces for bonding, buccal surfaces were transformed flat-ground with 600-1000-2500-4000-grit SiC papers. The teeth were distributed into 12 groups. Universal adhesives (G-aenial Bond/GC, Clearfil Universal Bond/Kuraray and Single Bond Universal/3M ESPE) were tested in both self-etch and etch-and-rinse modes on enamel and dentin (n=10). All adhesives were used according to manufacturers’ instructions. A stainless steel metal ring with an internal diameter of 2-mm was used to bond the composite (A2-enamel, Filtek Ultimate/3M ESPE) to the tooth surfaces. SBS tests were performed by using a universal testing machine (Instron Corporation/Canton) (1 mm/min) after 21-days of storage in distilled water. The percentages of failure modes (adhesive-cohesive-mixed) were also evaluated. Data were analyzed with t-test and one-way ANOVA and Bonferroni tests (p=0.05).
Results: The SBS values were not affected by the adhesives and by their application modes in enamel (p>0.05). G-aenial Bond in etch-and-rinse mode showed significantly lower SBS than its self-etch mode (p=0.022), and Clearfil Universal Bond in etch-and-rinse mode (p=0.03) in dentin. The SBS of adhesives to dentin in self-etch mode did not show statistically differences (p=0.160). Generally adhesive failures were observed in both modes for all adhesives.
Conclusions: With regard to the adhesive systems used in this study, universal adhesives showed similar enamel bond strengths in both etching modes whereas etch-and-rinse mode could affect the bond strength to dentin. The influence of different etching modes of universal adhesives was found to be dependent on the adhesive material.