Microleakage of Resin Composite Restoration with Total-Etch and Self-Etch Systems at Various Curing Distances

Microleakage still occurs between cavity wall and resin composite restoration, although bonding agent such as Total-etch (TE) and Selfetch (SE) systems had been used. One of the causes of microleakage was associated to improper polymerization affected by curing distances. The objective of this study was to evaluate the microleakage of resin composite restoration using TE and SE adhesive systems that were polymerized at various curing distances. A total of 120 human molars were prepared for class V cavity and were divided into 4 groups with bonded resin composite restoration: Group A (TE): Filtek Z350 + Adper Single Bond 2; Group B (TE): Tetric N Ceram + Tetric N Bond; Group C (SE): Clearfil APX + SE Bond; and Group D (SE): Ceram X + Xeno III. Each group were divided into 3 parts (10 teeth each) which were restored at 0; 2 and 4 mm of curing distance respectively. After stored in aquadest at 37oC (24 hours), all specimens were immersed in 1% methylene blue solution (24 hours). Dye penetration at coronal site were observed under a stereomicroscope (Nikon SM 2800). The results showed that microleakage between 3 various curing distances of each group were not significantly different (Kruskall-Wallis test, p>0,05). Mann-Whitney U test (p<0,05) showed that microleakage between Group A-C; Group A-D and Group B-D were significantly different at 2 mm curing distance. Conclusion: microleakage of resin composite restoration with TE adhesive system were lower than SE at all curing distances.DOI: 10.14693/jdi.v15i2.6