title: Effects of cyclic stressing on attachment bond strength using glass ionomer cement and composite resin.
abstract: Bonded orthodontic brackets were subjected to cyclic loading in order to simulate the effect of occlusal forces. The subsequent effect on bond strength was determined. Stainless steel, mesh-based brackets were bonded to extracted teeth with either composite resin or glass ionomer cement. A jig was designed to subject each bracket to a preselected loading level and the 24-hour shear/peel bond strength of both stressed and unstressed brackets was subsequently measured. Cyclic loading brought about a comparative decrease in bond strength when using both types of material. The potential implications of selecting these different types of bonding material for clinical use are discussed.
authors.affiliation: Orthodontic Department, Eastman Dental Institute and Hospital, London, UK.
authors.forename: H C
authors.initials: HC
authors.lastname: Moseley
authors.forename: E N
authors.initials: EN
authors.lastname: Horrocks
authors.forename: G J
authors.initials: GJ
authors.lastname: Pearson
authors.forename: E H
authors.initials: EH
authors.lastname: Davies
mesh_terms: D000134:Acid Etching, Dental; D001641:Bicuspid; D001732:Bite Force; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003799:Dental Stress Analysis; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D013193:Stainless Steel; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements; D013193:Stainless Steel