title: Effects of etching time on enamel bond strengths.
abstract: This study evaluated the effects of etching time on bond strengths of composite to enamel. Proximal surfaces of extracted molars were etched with either a conventional etchant (35% phosphoric acid) or one of two dentin/enamel conditioners, 10% maleic acid (Scotchbond Multi-Purpose Etchant), or a solution of oxalic acid, aluminum nitrate, and glycine (Gluma 1 & 2 Conditioner). Each agent was applied for 15, 30, or 60 seconds. Specimens etched with 35% phosphoric acid had the highest mean bond strengths at each etching time. At the manufacturer's recommended application times, the other two agents gave significantly lower shear bond strengths than phosphoric acid.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Creighton University, Omaha, NE 67178.
authors.forename: P T
authors.initials: PT
authors.lastname: Triolo
authors.forename: E J
authors.initials: EJ
authors.lastname: Swift
authors.forename: A
authors.initials: A
authors.lastname: Mudgil
authors.forename: A
authors.initials: A
authors.lastname: Levine
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods*; D000704:Analysis of Variance; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005976:Glutaral; D006801:Humans; D008298:Maleates; D008422:Materials Testing; D010070:Oxalates; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; D019279:Resin Cements; D012822:Silicon Dioxide; D013718:Tensile Strength; D013997:Time Factors; D015040:Zirconium
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D008298:Maleates; D010070:Oxalates; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C083568:Z100 composite resin; D012822:Silicon Dioxide; C030272:maleic acid; C044372:Gluma; D015040:Zirconium; C030242:phosphoric acid; D005976:Glutaral