title: An in vitro comparison of different adhesive strategies on the micro push-out bond strength of a glass fiber post.
abstract: OBJECTIVE
  To evaluate in vitro the push-out bond strengths of a glass fiber post adhesively luted with self-etching resin based and self-adhesive luting cements, as well as modified application procedure of self-adhesive luting cements in combination with single step self-etch adhesives.
  
  
  METHODS
  Fifty single-rooted human maxillary central incisor teeth were endodontically treated and divided into five groups (n=10). Glass fiber posts (RelyX Fiber Post) were cemented with the following materials: group 1: ED Primer II/Panavia F 2.0 (PAN); group 2: RelyX Unicem (RU); group 3: Maxcem (MC); group 4: Adper Prompt L-Pop (PLP)/RelyX Unicem; group 5: Optibond all-in-one (OB)/Maxcem. Bonded specimens were cut (1-mm-thick sections) and push-out tests were performed (crosshead-speed, 0.5 mm/min). Data were analyzed by one-way ANOVA followed by the Tukey-HSD test for post hoc comparisons at a = 0.05.
  
  
  RESULTS
  The highest bond strength was recorded for groups 4 and 2, with no statistically significant differences among them (p >0.05). Group 4 showed significantly higher bond strength than group 1 (p <0.001), group 3 (p <0.0001) and group 5 (p <0.0001). Group 1 showed significantly higher bond strength than the group 3 (p <0.05). No statistically significant differences were observed among group 1 and group 2, group 1 and group 5, group 3 and group 5. Group 3 showed significantly lower push-out bond strength than the all other luting strategies except for the group 5.
  
  
  CONCLUSIONS
  The push-out bond strength values of modified application procedure of self-adhesive luting cements (RU and MC) in combination with single step self-etch dentin adhesives (PLP and OB) did not improve the push-out bond strength of fiber post when compared with those where the conventional use of self-adhesive cements.
authors.affiliation: Department of Operative Dentistry, Faculty of Dentistry, Istanbul University (34300) Capa, Istanbul/Turkey. uerdemir@hotmail.com
authors.forename: Ugur
authors.initials: U
authors.lastname: Erdemir
authors.forename: Hande
authors.initials: H
authors.lastname: Sar-Sancakli
authors.forename: Esra
authors.initials: E
authors.lastname: Yildiz
authors.forename: Sevda
authors.initials: S
authors.lastname: Ozel
authors.forename: Burak
authors.initials: B
authors.lastname: Batur
mesh_terms: D003738:Dental Cements; D003764:Dental Materials; D005898:Glass; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning
chemical_list: D003738:Dental Cements; D003764:Dental Materials; C009753:fiberglass