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

Affiliations
  • 1Division of Oral Rehabilitation, School of Dentistry, Universidad Científica Del Sur, Lima, Perú
  • 2Division of Orthodontic, School of Dentistry, Universidad Científica Del Sur, Lima, Perú
  • 3Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Ramiro Barcelos, Rio Branco, Porto Alegre, RS, Brazil

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
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