Bonding in Wet Environment: Evaluation of Tensile Bond Strength of Metallic Brackets

Pedro César Fernandes dos SANTOS, José Fortunato Ferreira SANTOS, Cauby Maia CHAVES JÚNIOR, Beatriz Guimarães Pereira CAMPOS, Helena Márcia Guerra dos SANTOS

We intend with this study evaluate the tensile bond strength of metallic foilmesh(Abzil-Lancer) bonded in human premolars with the light-cured resin Transbond-XT associated with moisture insensitive primer Transbond-MIP or with resin-modified light-cured glass ionomer Fuji Ortho LC, both in wet environment, compared to chemical pastepaste resin Concise Ortodôntico(Control) and the light-cured adhesive TransbondXT, in dry environment. The index of adhesive remnant was observed with optical microscopy and damages of enamel with stereoscopy electronic microscopy (SEM). The foil-mesh AbzilLancer brackets bonded with Concise Ortodôntico, in dry environment, or with the Transbond-XT plus Transbond-MIP, in wet environment, showed the highest values of bond strength compared to resin-modified light-cured glass ionomer cement Fuji Ortho LC, in wet environment, and Transbond-XT, in dry environment. The incidence of failure was predominant in enamel-adhesive interface for Transbond-XT, with or without Transbond-MIP, and with Fuji Ortho LC, but Concise Ortodôntico showed more failure incidence in enamel-bracket interface. There was no case of enamel fracture.

Keywords: Metallic brackets. Tensile bond strength. Bond strength. Adhesives.

Saturday, December 28, 2024 22:38