title: Microtensile bond strength of resin cements to caries-affected dentin.
abstract: BACKGROUND
  The bonding of resin materials to caries-affected dentin, especially self-adhesive cements, remains a challenge in dentistry.
  
  
  OBJECTIVE
  The purpose of this study was to evaluate the bond strength of different resin cements to sound or caries-affected dentin at 24 hours and 6 months after the bonding procedure.
  
  
  METHODS
  Thirty-six human molars were used, 18 sound and 18 affected by caries. Indirect composite resin blocks (Tescera) were bonded to dentin by using 3 different resin cements: RelyX ARC, Panavia F, and RelyX Unicem. A universal testing machine was used to measure the microtensile bond strength 24 hours and 6 months after the bonding procedure. Representative specimens were analyzed with a scanning electron microscopy. The results were submitted to 3-way analysis of variance and the Fisher test (α=.05).
  
  
  RESULTS
  The highest values of microtensile bond strength were found with RelyX ARC for both tooth conditions (P<.001). There was no difference between RelyX Unicem and Panavia F (P>.05). There was no difference between caries-affected and sound dentin (P=.89).
  
  
  CONCLUSIONS
  Caries did not influence the bonding strength of resin cements to dentin.
authors.affiliation: Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, Sao Paulo State University, Araçatuba, Brazil.
authors.forename: Thaís Y U
authors.initials: TY
authors.lastname: Suzuki
authors.forename: André G L
authors.initials: AG
authors.lastname: Godas
authors.forename: Ana P A
authors.initials: AP
authors.lastname: Guedes
authors.forename: Anderson
authors.initials: A
authors.lastname: Catelan
authors.forename: Sabrina
authors.initials: S
authors.lastname: Pavan
authors.forename: André L F
authors.initials: AL
authors.lastname: Briso
authors.forename: Paulo H
authors.initials: PH
authors.lastname: Dos Santos
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003731:Dental Caries / Q000473:pathology*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010756:Phosphoric Acids / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D058105:Polymerization; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C500742:ED Primer II; D008689:Methacrylates; C438843:Panavia-Fluoro; D010756:Phosphoric Acids; D011109:Polymethacrylic Acids; C483701:Rely X Unicem; C462240:RelyX ARC; D019279:Resin Cements; C481143:TESCERA; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C030242:phosphoric acid