Nanoleakage Evaluation of Nano-Filled Resin Composite using Different Adhesive Systems at Different Dentin Depth

Abstract

Objective: This study evaluated the nanoleakage of nano-filled resin composite using different adhesive systems at different dentin depth. Material and Methods: A total of 120 freshly extracted human molars were used in this study. The selected teeth were randomly divided into two main groups according to adhesive system(self-etch and total etch), each main group were divided in to two groups according to dentin depth(superficial and deep dentin), each group were divided in to 3 sub-groups according to storage periods(24hours,3 months and 6 months). All the prepared cavities were restored incrementally using the nanofilled resin composite, then the specimens were immersed into silver nitrate and sectioned. Nanoleakage was measured. Results: The results showed that there was no statistically significant difference between self-etch and total etch according to the effect of adhesive system nor dentin depth on nanoleakage, while there was a statistically significant increase in median nano-leakage scores from 24 hours to 3 months as well as from 3 to 6 months of storage time. Conclusion:Usage of total etch or self-etch bonding agents has a positive effect on decreasing resin composite leakage. In deep dentin, it is advisable to use self etch bonding agents, while using total etch is indicated for deep dentin.

Effect of Bulk- Filling, Snowplow and Injection-Molded Techniques on Nanoleakage of Class II Composite Restorations in Permanent Molars using different etching modes (An in vitro Study)

“…In addition, various degrees of silver penetration were obvious between samples of different groups indicating different degrees of nanoleakage. This result could be related to the chemical nature of the universal adhesive that is reflected on the expected degree of polymerization shrinkage and the degree of water sorption (dye solution) (52) .…”