J Adv Prosthodont.  2021 Aug;13(4):237-245. 10.4047/jap.2021.13.4.237.

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

• Atoche-Socola KJ
• Arriola-Guillén LE
• López-Flores AI
• Garcia IM
• Huertas-Mogollón G
• Collares FM
• Branco Leitune VC

• KMID: 2519397
• DOI: http://doi.org/10.4047/jap.2021.13.4.237

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.

Keyword

Zirconia; Ceramics; Dental cements; Cleaning; Mechanical test