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Inicio Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral Influencia del tiempo de tratamiento de superficie con ácido fluorhídrico de l...
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Vol. 5. Núm. 3.
Páginas 117-121 (diciembre 2012)
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Vol. 5. Núm. 3.
Páginas 117-121 (diciembre 2012)
Open Access
Influencia del tiempo de tratamiento de superficie con ácido fluorhídrico de la porcelana VITA VM 13 en la resistencia de unión a cemento de resina frente a fuerzas de tracción. Estudio in vitro
Influence of surface treatment time with hydrofluoric acid of VITA VM13 porcelain on tensile bond strength to a luting resin cement. In vitro study
Visitas
1623
J.P. Guzmán Thoms1,
Autor para correspondencia
jp.guzman.t@gmail.com

Correspondencia autor.
, H. González Bustamante2, M. Salgado Montoya2
1 Cirujano Dentista. Especialista en Rehabilitación Oral. Universidad San Sebastián. Chile
2 Profesores Asociados. Facultad de Odontología, Universidad San Sebastián, Sede Santiago. Chile
Este artículo ha recibido

Under a Creative Commons license
Información del artículo
Resumen
Introducción

Los procedimientos restauradores indirectos son comunes en la clínica diaria actual. Se debe tener cuidado especial en la cementación, pues la gran mayoría de los fracasos ocurren en la interfase diente/restauración. Por esto es indispensable un adecuado tratamiento de superficie de la restauración para lograr una adhesión óptima a la superficie dentaria.

Materiales y Métodos

Treinta cilindros de porcelana VITA VM 13 con dimensiones de 5mm de altura y 7mm de diámetro fueron separadas aleatoriamente en 3 grupos (n=10) de acuerdo con los tratamientos recibidos. Grupo I (control) - sin acondicionamiento superficial; Grupo II - grabado con ácido fluorhídrico al 9.6% por 1 minuto; Grupo III - grabado con ácido fluorhídrico al 9.6% por 2 minutos. Estas fueron probadas en cuanto a su resistencia de unión a la tracción en una máquina universal para pruebas (INSTRON modelo 4411, 3M). Los valores, expresados en MPa, fueron analizados estadísticamente a un nivel de significación del 5%, usando el Análisis de la Varianza (ANOVA) de un factor.

Resultados

En relación con la prueba de resistencia de unión a la tracción, se encontraron los siguientes valores medios para cada grupo: Grupo I (control) - x=3.35 MPa; Grupo II - x=4.64 MPa; Grupo III - x=3.80 MPa.

Conclusiones

Según los resultados obtenidos, se puede concluir que el tratamiento de superficie con ácido fluorhídrico durante 1 minuto, promueve microrretenciones que aumentan significativamente los valores de resistencia a la tracción, que puede traducirse en un beneficio clínico mayor.

Palabras clave:
Porcelana feldespática
resistencia de unión
acondicionamiento de superficie
grabado con ácido fluorhídrico
Abstract
Aim

Indirect restorative procedures are common in the current daily practice. Special care must be taken in the cement, as the vast majority of failures occurs at the interface tooth /restoration. Therefore a proper surface treatment of the restoration is essential to achieve optimum adhesion to the tooth surface.

Materials and Methods

Thirty porcelain cylinders VITA VM 13 with dimensions of 5mm in height and 7mm in diameter were randomly divided into 3 groups (n=10) according to the treatments received. Group I (control) - no surface conditioning; Group II- recorded with 9.6% hydrofluoric acid for 1 minute; Group III - recorded with 9.6% hydrofluoric acid for 2 minutes. Their tensile bond strength was tested in a universal testing machine (Instron Model 4411, 3M). The values, expressed in MPa, were statistically analyzed at a level of significance of 5%, using Analysis of Variance (ANOVA) of a factor.

Results

In relation to the bond strength test, tensile strength, revealed the following values for each group: Group I (control) - x=3.35 MPa, Group II - x=4.64 MPa, Group III - x=3.80 MPa.

Conclusions

According to the results, it can be concluded that the surface treatment with hydrofluoric acid for 1 minute promotes microretentions, which significantly increase the values of bond strength, tensile strength. This can result in a higher clinical benefit.

Key words:
Feldspathic porcelain
bond strength
surface conditioning
hydrofluoric acid etching
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Copyright © 2012. Sociedad de Periodoncia de Chile, Sociedad de Implantología Oral de Chile y Sociedad de Prótesis y Rehabilitación Oral de Chile
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