Bond strength to micro-shearing in feldspathic ceramics conditioned with hydrofluoric acid and subjected to different removal times and methods

• Autores: Peralta Mas, Fátima Brunella, Niño Osorio, María Angélica, Chávez Alayo, Pablo Armando, Dominguez, John Alexis
• Formato: artículo
• Fecha de Publicación: 2025
• Institución: Universidad Peruana Cayetano Heredia
• Repositorio: Revistas - Universidad Peruana Cayetano Heredia
• Lenguaje: español; inglés
• OAI Identifier: oai:revistas.upch.edu.pe:article/6324
• Enlace del recurso: https://revistas.upch.edu.pe/index.php/REH/article/view/6324
• Nivel de acceso: acceso abierto
• Materia: ácido fluorhídrico; cerámica; resistencia al corte; remoción de contaminantes; agua destilada; hydrofluoric acid; ceramics; shear strength; contaminant removal; distilled water; ácido fluorídrico; cerâmica; resistência ao cisalhamento; remoção de contaminantes; água destilada

Objective: To evaluate the micro-shearing bond strength in feldspathic ceramics through various methods of hydrofluoric acid residue removal and different application times. Materials and methods: An in vitro study in which 9% hydrofluoric acid was applied for 1 minute as a surface treatment on feldspathic ceramic discs. The samples were divided into 4 groups with 3 different application times and subjected to different removal methods: water and air spray; ultrasonic bath with distilled water; active application of 37% phosphoric acid for 1, 2, and 4 minutes; and a combination of 37% phosphoric acid actively applied for 1, 2, and 4 minutes followed by an ultrasonic bath with distilled water for 4 minutes. Cylinders of flowable resin were prepared and placed on the ceramic discs. Samples were subjected to micro-shear tests on a semi-universal testing machine. Results: The two-way ANOVA test and Tukey's post-hoc test (p < 0.05) revealed that the water spray group at 1 and 2 minutes, and the ultrasonic bath at 4 minutes showed the highest bond strength values ​​with a statistically significant difference. Conclusions: The water spray removal method for 1 and 2 minutes showed the highest bond strength value, while the lowest was observed with the 37% phosphoric acid removal method for 2 minutes.