Microleakage Difference of Self Adhering Flowable Composites Prepared By Er, Cr: YSGG Laser And Bur

Purpose The aim of this in-vitro study was to evaluate self-adhering flowable composites (SAFCs) in point of microleakage in bur and Er,Cr:YSGG laser prepared class V cavities. Materials and Methods 50 human premolar teeth were randomly divided into 5 groups(n = 10) restored with different materials as Vertise Flow(VF), Fusio Liquid Dentin(FLD), Constic(CON), Nova Compo SF(NCS) and Clearfill S ³ Bond Plus/Clearfil Majesty Flow (S ³ MF). Class V cavities on the samples’ buccal surfaces were prepared with bur and on the palatinal surfaces with Er,Cr:YSGG laser. Restorations were completed according to the manufacturer's instructions. After 2000 thermocycles and immersion in 50% wt/wt AgNO ₃ aqueous solution, teeth were sectioned and dye penetration was evaluated under stereomicroscope and Scanning Electron Microscopy (SEM). And also resin-tooth interactions and micro-gap formations were analysed by SEM. Kruskal-Wallis, Mann-Whitney U and Wilcoxon signed-rank statistical tests were performed. Results Although no system's average microleakage score has exceeded "1" there were significant differences among the groups(p = 0.036). VF is always showed less microleakage compared to others while S ³ MF displayed the highest scores. There were no significant differences in microleakage scores between SAFC groups. Microleakage was significantly less in bur prepared cavities than Er,Cr:YSGG laser prepared ones (p < 0.001). Microleakage scores of occlusal margins were significantly lower than gingival margins (p < 0.001). Conclusions SAFCs especially the VF and FLD seems to be suitable for application on class V cavities and considering the advantages and disadvantages, the Er;Cr:YSGG laser method appears to be compatible with SAFCs especially within the enamel baundaries.