Estudio comparativo de la fuerza de adhesión de brackets policristalinos de adhesión química y monocristalinos de adhesión mecánica.

Abstract

With the introduction of the first ceramic brackets in 1986, aesthetic benefits were obtained; but a problem showed up when the adhesive strength that provided these brackets to the enamel was excessive and caused fractures during debonding. Through time, retention mechanisms in the base of the brackets have been created to decrease the adhesive strength, reducing that way enamel damages. The purpose of this study was to compare if the shear bond strengths of the polycrystalline brackets with chemically adhesion are similar to the monocrystalline brackets with mechanically adhesion. All brackets were bonded with Transbond MIP resin following manufactured instructions and using a control group with metallic brackets. All the samples were tested under tangential forces in the Instron machine 1 mm/min; all the results were analyzed with ANOVA of one way with a significance of (p < 0.01) this demonstrate that brackets with chemical adhesion exceeded the adhesive support in comparison with mechanically adhesion group. It may be considered the use of chemical adhesive brackets as we apply this use we increase enamel damages during debonding.