title: Shear bond strength of orthodontic brackets with newly developed antibacterial self-etch adhesive.
abstract: Because the enamel adjacent to brackets may be affected by microorganisms, an antibacterial adhesive may be a useful choice to prevent and reduce demineralization. The purpose of this in vitro study was to determine the (1) shear bond strength of a self-etch and an antibacterial self-etch adhesive for orthodontic metal brackets and (2) bond failure interface of a self-etch and an antibacterial self-etch adhesive using a modified adhesive remnant index (ARI). Twenty-four defect-free premolars were randomly assigned into two groups. The teeth received the following treatments-group 1: Transbond Plus Self-Etching Primer + Transbond XT; group 2: antibacterial dentin bonding system (ABF) + Transbond XT. All samples were stored in deionized water at 37 degrees C for 48 hours. Shear debonding tests were performed at a crosshead speed of five mm/min. The results in megapascals were (median, minimum, maximum) group 1: 8.53, 4.59, 12.63; group 2: 9.79, 4.01, 22.10, respectively. Mann-Whitney test revealed that the difference between the groups was not statistically significant (P = .2, P > .05). Failed brackets were examined by an optical microscope at 16x magnification to determine the bond failure interface using a modified ARI. The predominant mode of failure for both groups was at the bracket-adhesive interface. ABF may have sufficient mechanical properties and also an antibacterial effect that makes it a good choice for orthodontic bonding.
authors.affiliation: Department of Conservative Dentistry, Baskent University, Ankara, Bahcelievler, Turkey. neslihan@baskent.edu.tr
authors.forename: Neslihan
authors.initials: N
authors.lastname: Eminkahyagil
authors.forename: Yonca
authors.initials: Y
authors.lastname: Korkmaz
authors.forename: Saadet
authors.initials: S
authors.lastname: Gokalp
authors.forename: Meserret
authors.initials: M
authors.lastname: Baseren
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000891:Anti-Infective Agents, Local; D001641:Bicuspid; D002327:Cariostatic Agents; D003722:Dental Alloys; D001840:Dental Bonding; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D005459:Fluorides; D006801:Humans; D008422:Materials Testing; D016910:Orthodontic Brackets; D011897:Random Allocation; D019279:Resin Cements; D033081:Shear Strength; D018709:Statistics, Nonparametric
chemical_list: D000891:Anti-Infective Agents, Local; D002327:Cariostatic Agents; D003722:Dental Alloys; D017220:Dentin-Bonding Agents; D019279:Resin Cements; C429625:Transbond Plus Self-Etching Primer; C477790:Transbond XT; D005459:Fluorides