title: Push-Out Bond Strength of Restorations with Bulk-Fill, Flow, and Conventional Resin Composites.
abstract: The aim of this study was to evaluate the bond strengths of composite restorations made with different filler amounts and resin composites that were photoactivated using a light-emitting diode (LED). Thirty bovine incisors were selected, and a conical cavity was prepared in the facial surface of each tooth. All preparations were etched with Scotchbond Etching Gel, the Adper Scotchbond Multipurpose Plus adhesive system was applied followed by photoactivation, and the cavities were filled with a single increment of Filtek Z350 XT, Filtek Z350 XT Flow, or bulk-fill X-tra fil resin composite (n = 10) followed by photoactivation. A push-out test to determine bond strength was conducted using a universal testing machine. Data (MPa) were submitted to Student's t-test at a 5% significance level. After the test, the fractured specimens were examined using an optical microscope under magnification (10x). Although all three composites demonstrated a high prevalence of adhesive failures, the bond strength values of the different resin composites photoactivated by LED showed that the X-tra fil resin composite had a lower bond strength than the Filtek Z350 XT and Filtek Z350 XT Flow resin composites.
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Rodrigo Vieira
authors.initials: RV
authors.lastname: Caixeta
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Ricardo Danil
authors.initials: RD
authors.lastname: Guiraldo
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Edmilson Nobumitu
authors.initials: EN
authors.lastname: Kaneshima
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Aline Silvestre
authors.initials: AS
authors.lastname: Barbosa
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Cassiana Pedrotti
authors.initials: CP
authors.lastname: Picolotto
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Ana Eliza de Souza
authors.initials: AE
authors.lastname: Lima
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Alcides
authors.initials: A
authors.lastname: Gonini Júnior
authors.affiliation: Department of Restorative Dentistry, School of Dentistry, University of North Parana (UNOPAR), Rua Marselha 183, 86041-140 Londrina, PR, Brazil.
authors.forename: Sandrine Bittencourt
authors.initials: SB
authors.lastname: Berger
mesh_terms: D000180:Acrylic Resins / Q000494:pharmacology*; D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000494:pharmacology*; D001840:Dental Bonding; D003793:Dental Restoration, Permanent; D008689:Methacrylates; D011140:Polyurethanes / Q000494:pharmacology*
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; C467913:Filtek Flow; D008689:Methacrylates; D011140:Polyurethanes; C529733:X-tra fil composite resin