Home Magazines Editors-in-Chief FAQs Contact Us

Evaluation of bond strength in lithium disilicate ceramics subjected to different times and methods of removal of hydrofluoric acid residues


Journal of Dental Health, Oral Disorders & Therapy
Raquel Yokebed Guerra Pérez,1 Anthony Pierre Bolaños Trujillo,1 Bruna Fortes Bittencourt,4 Pablo Chavez Alayo,1,2 Diego Alonso Melendez Murillo,1 John Alexis Dominguez3

Abstract

Objective: To evaluate the bond strength in lithium disilicate ceramics subjected to
different times and methods of removal of conditioning residues.
Materials and methods: Bonding strength was evaluated in lithium disilicate discs after
conditioning with hydrofluoric acid, the samples were subjected to different times and
methods of removal: air-water spray, ultrasonic bath with distilled water 2 min, ultrasonic
bath with distilled water 4 min, phosphoric acid 2 min, phosphoric acid 4 min. Cylinders
were made of flowable composite resin that were positioned on the discs. The samples were
subjected to micro-shear tests on a universal testing machine.
Results: The two-way ANOVA test and the Pos Hoc Tukey test (p<0.05) revealed that
the ultrasonic bath group with distilled water 2 min presented significant difference with
respect to the phosphoric acid 4 min; however, it did not present significant difference with
respect to the other groups.
Conclusion: The ultrasonic bath removal method for 2 min presented the highest value of
bonding strength.

Keywords

Ceramics, Hydrofluoric Acid, Microshear bond strength

Testimonials