title: Effects of post surface treatments on the bond strength of self-adhesive cements.
abstract: OBJECTIVE
  To evaluate whether fiber post surface conditioning techniques would influence the ultimate retentive strength of self-adhesive resin cements into the root canal.
  
  
  METHODS
  50 single-rooted premolars with one root canal were endodontically treated and prepared to receive a fiber post. Five groups were formed (n=10) according to the post surface pre-treatment performed: (1) Silane application (Monobond S) for 60 seconds; (2) 10% hydrogen peroxide application for 20 minutes; (3) Rocatec Pre; (4) Silicate/silane coating (DT Light SL Post); (5) No treatment (DT Light Post). Two self-adhesive resin cements (RelyX Unicem and MaxCem) were used as luting agents. The bonded specimens were stored up to 1 month (37 degrees C and 100% humidity). The force required to dislodge the post (MPa) via an apical-coronal direction was measured with the push-out bond strength test (cross-head speed: 0.5 mm/minute until failure). Failure patterns were evaluated under SEM. Data was statistically analyzed with one-way ANOVA and Tukey tests (P< 0.05).
  
  
  RESULTS
  No increase in the push-out bond strength values were observed for RelyX Unicem, independently from the post surface treatment performed. MaxCem attained higher bond strengths when luted to silanated posts.
authors.affiliation: Department of Fixed Prosthodontics and Dental Materials, School of Dental Medicine, Policlinico "Le Scotte", University of Siena, viale Bracci 1, Siena, 53100, Italy. claudiamazzitelli@yahoo.it
authors.forename: Claudia
authors.initials: C
authors.lastname: Mazzitelli
authors.forename: Federica
authors.initials: F
authors.lastname: Papacchini
authors.forename: Francesca
authors.initials: F
authors.lastname: Monticelli
authors.forename: Manuel
authors.initials: M
authors.lastname: Toledano
authors.forename: Marco
authors.initials: M
authors.lastname: Ferrari
mesh_terms: D000704:Analysis of Variance; D001641:Bicuspid; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D004853:Epoxy Resins; D006801:Humans; D006861:Hydrogen Peroxide; D011176:Post and Core Technique; D011791:Quartz; D019279:Resin Cements; D012821:Silanes; D018709:Statistics, Nonparametric; D013499:Surface Properties
chemical_list: D003738:Dental Cements; D017220:Dentin-Bonding Agents; D004853:Epoxy Resins; C515955:Maxcem; C076808:Monobond S; C483701:Rely X Unicem; D019279:Resin Cements; C076811:Rocatec; D012821:Silanes; D011791:Quartz; D006861:Hydrogen Peroxide