Publicado en línea: 18 ene 2024
Páginas: 8 - 12
DOI: https://doi.org/10.2478/aoj-1993-0019
Palabras clave
© 1993 Gregory J. White et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Orthodontic brackets were bonded to one of two porcelain surfaces using a self-cured or one of two light-activated orthodontic bonding resins. The porcelain surfaces were either glazed (control) or de-glazed (experimental) by being subjected to either 1.23% APF for 4 minutes or roughened with a Busch silent wheel. The bonds were tested to failure in shear mode on a universal mechanical testing machine. For one porcelain, there was no significant difference in the mean bond strengths between the control and the APF-treated surface, but for the second porcelain the mean bond strength was significantly greater when the surface was de-glazed by abrasion. It is considered that the mean bond strengths may be inadequate to withstand manipulations associated with routine orthodontic therapy.