Microshear bond strength of dual-cure resin cement in zirconia after different cleaning techniques: an in vitro study

ABSTRACT

PURPOSE@#This study aimed to compare the microshear bond strength (µSBS) of dual-cure resin cement in CAD-CAM zirconia after different cleaning techniques. @*MATERIALS AND METHODS@#Fifty discs of zirconia-based ceramic from Ivoclar Vivadent were embedded in acrylic resin. The discs were divided into five groups according to the cleaning @*methods@#used Group 1 drying with spraying + sandblasting with Al2O3 ; Group 2 washed with water and dried with spraying + sandblasting with Al2O 3 ; Group 3 washed with distilled water and dried with spraying + sandblasting with Al2O3 + zirconium oxide (Ivoclean); Group 4 washed with distilled water and dried with spraying + sandblasting with Al2O3 + potassium hydroxide (Zirclean); and Group 5 washed with distilled water and dried with spraying + sandblasting with Al2O3 + 1% NaClO. All of the groups were contaminated with artificial saliva for 1 minute and then cleaned. Statistical analyses were performed using ANOVA and Tukey’s tests. @*RESULTS@#There were statistically significant differences among all groups for µSBS (P < .05). The group treated with zirconium oxide (Group 3) showed the highest µSBS (18.75 ± 0.23 MPa). @*CONCLUSION@#When applied to zirconia, the cleaning methods affected the bonding with resin cement differently.