title: Metallic bracket to enamel bonding with a photopolymerizable resin-reinforced glass ionomer.
abstract: Enamel acid etching plays an important role in treatment on direct bracket bonding. Several studies have been carried out concerning the damage this procedure causes to the enamel. A valuable alternative seems to be the use of photopolymerizable resin-reinforced glass ionomer without acid etching of enamel. This study compares the strength of bracket debonding, the amount of remnant adhesive on the tooth, and the enamel condition in 3 adhesive systems. Three groups were set; in the first group, a glass ionomer with a photopolymerizable resin reinforce and enamel etching with orthophosphoric acid at 37% was used; in the second group, the same ionomer was used but without acid etching; and in the third group, a photopolymerizable resin was used after etching enamel with orthophosphoric acid at 37%. Debonding strength was determined in MPa; a stereoscopic microscope was used to determine the amount of remnant adhesive on the tooth in accordance to ARI and a scanning electron microscope study was made to observe the enamel conditions, existing in debonding among groups (P <.0001), with etching and without etching. The remnant adhesive on the tooth did not show a significant difference (P = 1.000); greater irregularities were found in the enamel in the etching groups. It was demonstrated that the etching was a critical factor in obtaining adequate adhesion strength and that it alters the enamel conditions. Teeth with ionomer and etching had a greater material remnant.
authors.affiliation: School of Dentistry, UNAM, Mexico City, Mexico.
authors.forename: A R
authors.initials: AR
authors.lastname: Flores
authors.forename: G
authors.initials: G
authors.lastname: Sáez E
authors.forename: F
authors.initials: F
authors.lastname: Barceló
mesh_terms: D000134:Acid Etching, Dental; D000180:Acrylic Resins; D000268:Adhesiveness; D000538:Aluminum Silicates; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D001840:Dental Bonding / Q000379:methods*; D017005:Dental Debonding; D003743:Dental Enamel; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008027:Light; D008670:Metals; D008855:Microscopy, Electron, Scanning; D016910:Orthodontic Brackets; D011108:Polymers / Q000737:chemistry; D013499:Surface Properties
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; C095451:Fuji Ortho LC; D005899:Glass Ionomer Cements; D008670:Metals; D011108:Polymers; C065742:Transbond; D017438:Bisphenol A-Glycidyl Methacrylate