title: Resin Bonding of Self-Etch Adhesives to Bovine Dentin Bleached from Pulp Chamber.
abstract: This study evaluated the microtensile bond strength (μTBS) of 1-step self-etch adhesives (1-SEAs) and 2-step self-etch adhesives (2-SEAs) to pulp chamber dentin immediately after bleaching with 2 types of common bleaching techniques. Pulp chamber dentin of bovine teeth was bleached using 30% hydrogen peroxide (H2O2) solution with quartz-tungsten-halogen light-curing unit (Group 1) and 3.5% H2O2-containing titanium dioxide (TiO2) (Pyrenees®) activated with 405-nm violet diode laser for 15 min (Group 2). Unbleached specimens were placed in distilled water for 15 min and used as controls. After treatment, dentin was bonded with resin composite using 1-SEA or 2-SEA and stored in water at 37°C for 24 h. Each specimen was sectioned and trimmed to an hourglass-shape andμTBS was measured. Fractured specimens were examined under a scanning electron microscope to determine fracture modes. All specimens in Group 1 failed before proper bonding tests. In Group 2, theμTBS of 2-SEA was significantly greater (with no failed specimens) than 1-SEA (where 21 out of 36 failed). These results indicate that 2-SEA is a better adhesive system than 1-SEA on bleached dentin. Our results also demonstrated that application of H2O2significantly decreases bond strength of resin to dentin; however, in the case of nonvital tooth bleaching, Pyrenees® is a better alternative to the conventional 30% H2O2bleaching.
authors.affiliation: Department of Endodontics and Clinical Cariology, Tokyo Dental College, 2-9-18 Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan.
authors.forename: Akiko
authors.initials: A
authors.lastname: Haruyama
authors.affiliation: Department of Endodontics and Clinical Cariology, Tokyo Dental College, 2-9-18 Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan.
authors.forename: Atsushi
authors.identifier: 0000-0002-3513-0265
authors.initials: A
authors.lastname: Kameyama
authors.affiliation: Department of Endodontics and Clinical Cariology, Tokyo Dental College, 2-9-18 Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan; Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
authors.forename: Junji
authors.initials: J
authors.lastname: Kato
authors.affiliation: Department of Dental Materials Science, Tokyo Dental College, 2-9-18 Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Takemoto
authors.affiliation: Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Oda
authors.affiliation: Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
authors.forename: Eiji
authors.initials: E
authors.lastname: Kawada
authors.affiliation: Division of General Dentistry, Tokyo Dental College Chiba Hospital, 1-2-2 Masago, Mihama-ku, Chiba 261-8502, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Endodontics and Clinical Cariology, Tokyo Dental College, 2-9-18 Misaki-cho, Chiyoda-ku, Tokyo 101-0061, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Furusawa
mesh_terms: D000818:Animals; D002417:Cattle; D003738:Dental Cements / Q000494:pharmacology*; D003786:Dental Pulp Cavity / Q000187:drug effects*; D003804:Dentin / Q000187:drug effects*; D006861:Hydrogen Peroxide / Q000494:pharmacology; D019279:Resin Cements / Q000494:pharmacology*; D014025:Titanium / Q000494:pharmacology; D014070:Tooth / Q000187:drug effects*; D058205:Tooth Bleaching Agents / Q000494:pharmacology*
chemical_list: D003738:Dental Cements; D019279:Resin Cements; D058205:Tooth Bleaching Agents; C009495:titanium dioxide; D006861:Hydrogen Peroxide; D014025:Titanium