title: Effects of NaOCl on bond strengths of resin cements to root canal dentin.
abstract: Microleakage occurs due to the lack of sealing ability of root sealing materials or adhesive cements used to lute post-core materials. This may cause premature failure of endodontic treatment. The purpose of this study was to evaluate regional bond strengths of four adhesive systems to root canal dentin. Sixteen extracted human single rooted teeth were used. After removing the crowns and the pulp tissues, the root canals were then instrumented and irrigated with or without 5% NaOCl. The root canal dentin walls were then bonded with C&B Metabond, Panavia F, Variolink II, or Rely-X. Microtensile bond strengths to root canal dentin were then measured using an Instron machine. The bond strength data were recorded and expressed in MPa. Statistically significant differences were found among the NaOCl treated and nontreated groups (p < 0.05). C&B Metabond gave the highest bond strength compared with others in the control group (p < 0.05). C&B Metabond also had significantly higher bond strength compared with Variolink II and Panavia F groups when the canals were irrigated with NaOCl (p < 0.05).
authors.affiliation: Selcuk University Faculty of Dentistry, Department of Endodontics, Konya, Turkey.
authors.forename: Hale
authors.initials: H
authors.lastname: Ari
authors.forename: Erdem
authors.initials: E
authors.lastname: Yaşar
authors.forename: Sema
authors.initials: S
authors.lastname: Belli
mesh_terms: D000268:Adhesiveness; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate; D001896:Boron Compounds; D001840:Dental Bonding; D003786:Dental Pulp Cavity; D003804:Dentin / Q000648:ultrastructure; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D008855:Microscopy, Electron, Scanning; D011092:Polyethylene Glycols; D011109:Polymethacrylic Acids; D019279:Resin Cements; D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite; D013718:Tensile Strength
chemical_list: D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D008768:Methylmethacrylates; C438843:Panavia-Fluoro; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; D012388:Root Canal Irrigants; C103502:Variolink; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C049495:Super-bond; D012973:Sodium Hypochlorite