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Published on: December 20, 2024
Evaluation of bond strength of metal brackets by a resin to ceramic surfaces
Humberto Federico Barceló Santana1, Rodrigo Hernández Medina, Susana Laura Acosta Torres
1Dentistry Department, Autonomous National University of Mexico, Mexico City, Mexico. barcelo@servidor.unam.mx
Objective:
The purpose of this study was to evaluate the bond strength of three different ceramic brands with two different ceramic surfaces (glazed and deglazed), with and without silane application.
Methodology:
Using the three different ceramics (Empress 2, Finesse, and Ceramco II), two metallic brackets were bonded to each sample, one with the adhesive system and the other one with a silane application. The samples were thermocycled, and then the debonding tests were performed with the Instron Universal Testing Machine. All the results were statistically analyzed with a three-way analysis of variance (ANOVA) test.
Results:
The three-way ANOVA (brand, ceramic surface, with/without silane) indicated significant differences among them (p < 0.05). ANOVA showed that the greatest bond strength value (megapascals, MPa) was for Empress 2 deglazed with the silane application (8.873 MPa), followed by Finesse glazed with the silane application (7.072 MPa).
Conclusion:
The ceramic surface has a direct effect on adhesion. Therefore, Empress 2 deglazed achieved the greatest value in bond strength. To achieve the ideal values of 6-10 MPa, applying silane to the ceramic surface before bonding the brackets is recommended, even though silane can damage the ceramic surface.
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