title: Effect of root-canal sealer on the bond strength of fiberglass post to root dentin.
abstract: OBJECTIVE
  To evaluate the effects of different root-canal sealers on the bond strength of a fiberglass post cemented with self-adhesive resin cements.
  
  
  METHODS
  Forty extracted maxillary single-rooted canines were prepared with the crown-down technique and randomly divided into four groups according to the tested sealer: Group 1: control group, gutta-percha cone only (no sealer); Group 2: EndoREZ; Group 3: Sealapex; Group 4: Endofill. The roots were obturated with the gutta-percha cone using the cold lateral compaction technique. Fiberglass posts were cemented into the prepared post spaces with the self-adhesive cement RelyX Unicem. Bonded specimens were sectioned into 1-mm thick slabs and a push-out test was performed in a universal machine.
  
  
  RESULTS
  Data were subjected to ANOVA and Tukey tests (α = 0.05). No significant difference was detected between Groups 1-3 (P > 0.05). Group 4 showed a lower bond strength than the other sealers (P < 0.05).
  
  
  CONCLUSIONS
  Endofill negatively interfered with the bond to root dentine; however, EndoRez and Sealapex did not affect the bond strength of the fiberglass post cemented with self-adhesive resin cements.
authors.affiliation: Department of Restorative Dentistry, Endodontics Area, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil. dgscecchin@yahoo.com.br
authors.forename: Doglas
authors.initials: D
authors.lastname: Cecchin
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: Farina
authors.forename: Matheus Albino
authors.initials: MA
authors.lastname: Souza
authors.forename: Charles Da Cunha
authors.initials: Cda C
authors.lastname: Pereira
mesh_terms: D002126:Calcium Hydroxide / Q000737:chemistry; D002484:Cementation / Q000379:methods; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D005898:Glass / Q000737:chemistry*; D006171:Gutta-Percha / Q000737:chemistry; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods; D018915:Root Canal Preparation / Q000379:methods; D012459:Salicylates / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors
chemical_list: D003188:Composite Resins; C481259:EndoRez; C483701:Rely X Unicem; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012459:Salicylates; C009753:fiberglass; C074417:Endo-Fill; C055601:Sealapex; D006171:Gutta-Percha; D002126:Calcium Hydroxide