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Atoche-Socola, Katherine Joselyn,Arriola-Guillen, Luis Ernesto,Lopez-Flores, Ana Isabel,Garcia, Isadora Martini,Huertas-Mogollon, Gustavo,Collares, Fabricio Mezzomo,Leitune, Vicente Castelo Branco The Korean Academy of Prosthodonitics 2021 The Journal of Advanced Prosthodontics Vol.13 No.4
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 Al<sub>2</sub>O<sub>3</sub>; Group 2: washed with water and dried with spraying + sandblasting with Al<sub>2</sub>O<sub>3</sub>;Group 3: washed with distilled water and dried with spraying + sandblasting with Al<sub>2</sub>O<sub>3</sub> + zirconium oxide (Ivoclean); Group 4: washed with distilled water and dried with spraying + sandblasting with Al<sub>2</sub>O<sub>3</sub> + potassium hydroxide (Zirclean); and Group 5: washed with distilled water and dried with spraying + sandblasting with Al<sub>2</sub>O<sub>3</sub> + 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.