Effect of Application Four Different Etching systems on Bond Strength of Orthodontic Brackets

This study aimed to compare the effects of different enamel etching techniques for bracket bonding strength. The sample consisted of eighty human premolars were randomly divided into four equal groups. The enamel surfaces of the teeth were etchedwith 35% orthophosphoric acid in Group 1 , air abraded with 50 μm aluminum oxide prior to acid etching in Group 2, Trans bond Plus Self-etching Primer (TPSEP) in Group 3 , Er: YAG laser in Group 4. After enamel etching procedures, brackets were bonded with Trans bond XT , then shear bonding test was performed using a testing machine (Tinius Olsen).

The Relationship between the Shear and Tensile Bond Strength and the Type of Adhesive Material for Bonding Orthodontic Brackets: Comparative Study

The purpose of this study was to evaluate the shear and tensile bond strengths of orthodontic brackets bonded with self etching primer and resin-reinforced glass ionomer cement in comparison with light cured resin adhesive. The tested self-etchingprimer and adhesive systems produced bond strength values higher than that of the light cured resin adhesive whereas the resin-reinforced glass ionomer cement showed a significantly reduced bond strength . Clinically, the use of self-etching primer and adhesive systems is suitable for orthodontic bracket bonding.