title: Restoration of endodontically treated teeth with major hard tissue loss--bond strength of conventionally and adhesively luted fiber-reinforced composite posts.
abstract: OBJECTIVE
  To evaluate the influence of the luting system on the pull-out bond strength of conventionally and adhesively luted fiber-reinforced composite posts (FRCPs).
  
  
  METHODS
  One hundred extracted bovine teeth (Di 3) were endodontically treated and randomly assigned to nine test groups and one control group (n = 10) according to luting system. After preparing the post cavities (8 mm), the custom-made FRCPs were inserted using conventional glass-ionomer cement (Ketac Cem), resin-reinforced glass-ionomer cement (Meron Plus and Fuji Plus), self-adhesive resin cement (RelyX Unicem and BisCem), self-conditioning adhesive and resin cement [Multilink Primer + Multilink and AdheSE + DC Activator + MultiCore Flow, or etch-and-rinse adhesive and resin cement (SealBond Ultima + CoreCem, and LuxaBond + LuxaCore Z). As a control, custom-made titanium posts were inserted with Ketac Cem. After water storage (37°C, 24 h, dark), the pull-out test was performed, followed by failure mode evaluation. The data were statistically analyzed (α = 0.05) using analysis of variance and the Dunnett T3 post hoc test.
  
  
  RESULTS
  Luting system type and identity significantly influenced bond strength (P < 0.001); the bond strengths of all luting systems except Ketac Cem, MeronPlus, and BisCem were significantly higher than the control (4.4 ± 1.1 MPa). RelyX Unicem (12.0 ± 3.0 MPa) and LB + LCZ (14.8 ± 2.3 MPa) generated the highest bond strengths. The clinical application was demonstrated by restoring a traumatized tooth with extensive coronal destruction and thin root canal walls, using a FRCP combined with direct composite build-up.
  
  
  CONCLUSIONS
  Luting system selection significantly influenced the bond strength of conventionally and adhesively luted FRCPs to bovine root canal dentin.
authors.affiliation: Dental Clinic 1 - Operative Dentistry and Periodontology, Friedrich-Alexander-University, Erlangen, Germany.
authors.forename: Stefanie
authors.initials: S
authors.lastname: Binus
authors.forename: Andreas
authors.initials: A
authors.lastname: Koch
authors.forename: Anselm
authors.initials: A
authors.lastname: Petschelt
authors.forename: Christine
authors.initials: C
authors.lastname: Berthold
mesh_terms: D000818:Animals; D002417:Cattle; D003738:Dental Cements; D004708:Endodontics; D008422:Materials Testing; D011176:Post and Core Technique
chemical_list: D003738:Dental Cements