title: An ex vivo study of self-, light-, and dual-cured composites for orthodontic bonding.
abstract: It was postulated that using a dual-cured composite to bond orthodontic brackets could result in bond strengths comparable with those of chemically-activated materials and higher than those for light-activated materials. The shear bond strength of four composite resins used to attach mesh-backed orthodontic brackets was measured at 24 hours and following mechanical insult in the ball-mill. Analysis of variance and an SNK range test showed that at 24 hours Dual-cured Porcelite gave a significantly higher mean bond strength than the other materials (P < 0.05). However, following ball-milling the mean bond strength for Right-on was apparently significantly higher than that of the other materials. (P < 0.05). In this study, the mode of bond failure is also analysed and the use of Weibull analysis in bond strength testing is described.
authors.affiliation: Department of Child Dental Health, Dental School, Newcastle upon Tyne, UK.
authors.forename: A E
authors.initials: AE
authors.lastname: Sargison
authors.forename: J F
authors.initials: JF
authors.lastname: McCabe
authors.forename: P H
authors.initials: PH
authors.lastname: Gordon
mesh_terms: D000134:Acid Etching, Dental; D000293:Adolescent; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002648:Child; D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D005459:Fluorides / Q000737:chemistry; D006801:Humans; D008027:Light; D008689:Methacrylates / Q000737:chemistry; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D008689:Methacrylates; D011140:Polyurethanes; C077601:Porcelite Dual Cure; D019279:Resin Cements; C091935:Sequence (bonding agent); C071164:Right-On cement; C065742:Transbond; D017438:Bisphenol A-Glycidyl Methacrylate; D005459:Fluorides