RESUMO
Aim: The aim of this study was to evaluate and compare eighth-generation bonding agent (G-Premio BOND) modified with 7% arginine and 0.12% chitosan for antibacterial property and microtensile bond strength. Methods: To evaluate antibacterial property, the sterile 96-microtiter plate was taken. The sidewalls of nine wells were coated with 15 µl of adhesive from each group. Suspension of Streptococcus mutans bacteria was placed on each group of adhesive and antibacterial property was checked using Spectrophotometer. Thirty-three healthy extracted premolars were taken and adhesive from each group was applied on the exposed surface of dentin, and the specimens were tested using a universal testing machine at crosshead speed of 1 mm/min. Results: The least antibacterial efficacy was seen with unmodified eighth-generation bonding agent. This result was statistically significant when all study groups were compared. Microtensile bond strength was evaluated and the highest mean value (5.07) was seen with adhesive modified with 7% arginine, followed by adhesive modified with 0.12% chitosan (mean value: 4.14), and unmodified adhesive had the lowest mean bond strength value (4.07). Conclusions: The eighth-generation bonding agent modified with 7% arginine and 0.12% chitosan showed antibacterial efficacy against S. mutans. In addition to this, they also had higher tensile bond strength values as compared to unmodified adhesive.
RESUMO
BACKGROUND: Fracture resistance of endodontically treated tooth is affected due to large cavity designs and access cavities and an appropriate material capable to resist fracture plays an important role. This review aims to evaluate the effect of fibre-reinforced composite (FRC) as a post-obturation material on fracture resistance of endodontically treated teeth. OBJECTIVES: To systematically gather and evaluate the fracture resistance of fibre-reinforced composite as a post-obturation restorative material in endodontically treated teeth. DATA SOURCES: A systematic search was conducted using PubMed, Ebsco Host, Scopus, Google Scholar, Hinari and manual search library resources from 1st Jan 2000 to 30th November 2019 to identify appropriate studies. RESULT: A total of 157 articles were examined out of which 55 articles were selected after reading the title. After removing the duplicates, 27 articles were screened for abstract and 1 article was eliminated as it did not meet the eligibility criteria. A thorough reading of the full text of the remaining 26 selected articles was assessed for eligibility. Amongst these, 1 article was then excluded from the study as the full text was not accessible. Lastly, 25 articles were included in the study. CONCLUSION: FRC as a core material increases fracture resistance of endodontically treated teeth but they do not have the fracture resistance similar to the intact tooth. Both polyethylene and short fibre-reinforced composites showed greater fracture resistance when compared to glass FRC and restoration without reinforcement. Also, the fracture resistance increases if restored with FRC along with retention slots and are placed on the occlusal third surfaces of cavities. Also, favourable fractures were most commonly seen and it usually occurred at the level of enamel and dentin and adhesive fractures were seen.
