title: Fiber post placement with core build-up materials or resin cements-an evaluation of different adhesive approaches.
abstract: OBJECTIVE
  To compare push-out bond strength of fiber-posts luted with different adhesive approaches to root canal dentin.
  
  
  METHODS
  Forty maxillary first incisors were decoronated and endodontically treated. Specimens were randomly distributed into five groups (n = 8) and fiber-posts (DentinPost coated, Komet) were inserted using five different luting materials: etch-and-rinse adhesive systems and corresponding core-and-post material in groups 1 (DentinBond/DentinBuild, Komet) and 2 (XP Bond + SCA/Core-X flow, Densply), self-adhesive resin cements in groups 3 (RelyX Unicem, 3M Espe) and 4 (SmartCem 2, Dentsply) and a self-etch adhesive/resin cement in group 5 (ED-Primer II/Panavia F 2.0, Kuraray). The roots were sectioned into eight 1 mm thick serial slices and within 48 h push-out bond strength was investigated. Statistical analyses were performed using non-parametrical Kruskal-Wallis H-test and Mann-Whitney U-test for differences between experimental groups at p < 0.05. The failure modes were analyzed using Chi square test.
  
  
  RESULTS
  The bond strength [MPa] (mean/min-max) for groups 3 (12.35/3.60-32.44), 4 (13.52/4.48-30.69) and 2 (11.15/5.23-35.58) were significantly higher (p < 0.001) compared to groups 1 (6.66/2.34-24.89) and 5 (7.41/0.28-34.18). Adhesive failure between dentin and luting agent was the most frequent failure mode.
  
  
  CONCLUSIONS
  Bond strength of fiber-posts adhesively luted to root canal dentin was significantly higher when self-adhesive resin cements were used. One (group 2) of the tested core-and-post materials/etch-and-rinse adhesive achieved comparable bond strength values.
authors.affiliation: Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, University School of Dental Medicine, Charité - Universitätsmedizin Berlin, Germany. guido.sterzenbach@charite.de
authors.forename: Guido
authors.initials: G
authors.lastname: Sterzenbach
authors.forename: Ghaleb
authors.initials: G
authors.lastname: Karajouli
authors.forename: Michael
authors.initials: M
authors.lastname: Naumann
authors.forename: Ingrid
authors.initials: I
authors.lastname: Peroz
authors.forename: Kerstin
authors.initials: K
authors.lastname: Bitter
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000268:Adhesiveness; D002484:Cementation / Q000379:methods; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003764:Dental Materials / Q000737:chemistry*; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005898:Glass / Q000737:chemistry; D006801:Humans; D007180:Incisor / Q000648:ultrastructure; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010756:Phosphoric Acids / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D018915:Root Canal Preparation / Q000379:methods; D013314:Stress, Mechanical; D013499:Surface Properties; D019553:Tooth, Nonvital / Q000473:pathology
chemical_list: D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C500742:ED Primer II; D008689:Methacrylates; C438843:Panavia-Fluoro; D010756:Phosphoric Acids; C483701:Rely X Unicem; D019279:Resin Cements; C474194:Self Cure adhesive; C532387:XP-Bond; C009753:fiberglass; C030242:phosphoric acid