title: Effect of EDTA treatment on the hybrid layer durability in total-etch dentin adhesives.
abstract: The effect of the ethylenediaminetetraacetic acid (EDTA) treatment on the hybrid layer durability of total-etch dentin adhesives was investigated. A flat dentin surface was exposed and treated with 37% phosphoric acid or 0.1 M EDTA. Dentin adhesive was applied and a 4 mm thick composite resin was built-up. Twenty 0.9×0.9 mm(2) resin-dentin beams were fabricated in each experimental group. Artificial aging with 10% NaClO was performed in half of the experimental groups for 1 hour. A micro-tensile bond strength (µTBS) test was performed and the bonded interface was analyzed with transmission electron microscopy (TEM). The 37% phosphoric acid-treated group showed a lower µTBS after artificial aging, whereas the 0.1 M EDTA-treated group did not. TEM analysis revealed collagen fibrils dissolved in the 37% phosphoric acid-treated group but not in the 0.1M EDTA-treated group. Undissolved minerals were observed in the 0.1 M EDTA-treated group. In conclusion, a dentin treatment with 0.1M EDTA is effective in improving the hybrid layer durability.
authors.affiliation: Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Hoegi-dong, Dongdaemun-gu, Seoul, Korea,130-702.
authors.forename: Duck-Su
authors.initials: DS
authors.lastname: Kim
authors.forename: Sang Hyuk
authors.initials: SH
authors.lastname: Park
authors.forename: Gi-Woon
authors.initials: GW
authors.lastname: Choi
authors.forename: Kyoung-Kyu
authors.initials: KK
authors.lastname: Choi
authors.forename: Sun-Young
authors.initials: SY
authors.lastname: Kim
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D002614:Chelating Agents / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D008903:Minerals / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D012973:Sodium Hypochlorite / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D013995:Time; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: C554641:Adper single bond 2; D002614:Chelating Agents; C112828:Clearfil AP-X; D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008903:Minerals; D016877:Oxidants; D010756:Phosphoric Acids; D014867:Water; D004492:Edetic Acid; D012973:Sodium Hypochlorite; C030242:phosphoric acid