INVESTIGATION OF DIFFERENT ADHESIVE SYSTEMS AND COMPOSITES IN TERMS OF MICROLEAKAGE IN CONVENTIONAL METHOD AND ER:YAG LASER PREPARED CLASS V CAVITIES

Aim: The aim of this study is to examine the microleakage caused by different adhesive systems and composites in class V cavities prepared with traditional method and Er:YAG laser. Material and Methods: 48 permanent molars without decay and restoration were removed and kept in distilled water after residual tissue were removed. Eight groups were formed with six teeth in each group; Group-1: Bur preparation (Bp)+ CLEARFIL Universal Bond Quick (UBQ)+CLEARFIL MAJESTY ES-2 Classic (ME2); Group-2: (Bp)+Bisco Universal PrimerTM (UP)+(ME2); Group-3: (Bp)+(UBQ)+Ceram X SphereTECTM (CX); Group-4: (Bp)+(UP)+(CX); Group-5: Laser preparation (Lp)+(UBQ)+(ME2); Group-6: (Lp)+(UP)+(ME2); Group-7: (Lp)+(UBQ)+(CX); Group-8: (Lp)+(UP)+(CX). All teeth were thermocycled 1500 times (5–550C). Then it was kept in 0.5% basic fuchsin for 24 hours . The dye penetration at the adhesive system-dentin interface in longitudinal sectioned class V cavities was evaluated under stereo microscopy according to the score table prepared by two observers. The adhesive material-dentin interfaces and the structure of the hybrid layer were examined by Scanning electron microscope (SEM) analysis. Statistical analyzes were tested with Mann-Whitney U test, Kruskal Wallis One-Way Analysis of Variance and Dunn's multiple comparison (p<0.05). Results: Microleakage scores on the cervical surfaces were higher than the occlusal surfaces in all groups. In addition, it was determined that the cavity preparation method did not create a statistically significant difference between the microleakage values on the occlusal surfaces of the restorations (p>0.05). It was observed that the adhesion method did not present a statistically significant result in terms of microleakage (p>0.05). Conclusion: Clearfil Majesty ES 2 composite was observed to be more successful in terms of microleakage. Clearfil Majesty ES 2 composite can be preferred for restoration of class V cavities. More laboratory and clinical studies are needed to determine the performance of adhesive systems in cavities prepared with laser.