title: The effect of silane on the bond strengths of fiber posts.
abstract: OBJECTIVE
  Esthetic posts have been developed to maximize the foundation of esthetic restorations. The purpose of this study was to evaluate the effect of silane on the bond strength of three fiber-reinforced resin posts (fiber posts).
  
  
  METHODS
  Fifty-four extracted human maxillary central incisors and canines were endodontically treated. D.T. Light Post (DT, Bisco), FRC Postec (FR, Ivoclar Vivadent), and ParaPost Fiber White (PP, Coltène/Whaledent) were inserted using the resin adhesive system provided by the respective manufacturer. For half of the specimens in each group, the fiber posts were treated with a silane solution (Monobond S, Ivoclar Vivadent). A push-out test was performed on three different sections of each root to measure bond strengths. Data were analyzed with ANOVA and Bonferroni's post hoc test at P<0.05.
  
  
  RESULTS
  The use of silane did not result in any statistically significant difference at any level of the root. Silane did not result in any significant different bond strengths (MPa) for each of the posts. When the data were pooled, the use of silane did not result in statistically significant different bond strengths at P>0.403: No silane=12.7+/-8.4; Silane=14.1+/-7.0. The coronal third of the root (17.5+/-6.7) resulted in statistically greater bond strengths than the medium third (12.9+/-6.8) and than the apical third (9.8+/-7.3) at P<0.002 and P<0.0001, respectively. The medium third and the apical third resulted in no statistically significant different bond strengths from each other at P>0.07. The type of post did not result in statistically significant different bond strengths at P>0.417: DT=14.7+/-6.8 MPa; FR=13.3+/-6.6 MPa; PP=12.2+/-6.6 MPa.
  
  
  CONCLUSIONS
  The use of a silane coupling agent did not increase the push-out bond strengths of the three fiber posts used in this study. All posts bonded to root dentin at the same magnitude. Bonding is more predictable at the most coronal level of the root.
authors.affiliation: Department of Restorative Sciences, Division of Operative Dentistry, University of Minnesota, 8-450 Moos Tower, 515 SE Delaware St, Minneapolis, MN 55455, USA. perdi001@umn.edu
authors.forename: Jorge
authors.initials: J
authors.lastname: Perdigão
authors.forename: George
authors.initials: G
authors.lastname: Gomes
authors.forename: Ignatius K
authors.initials: IK
authors.lastname: Lee
mesh_terms: D001729:Bismuth / Q000627:therapeutic use; D003188:Composite Resins / Q000737:chemistry*; D003481:Cuspid; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000648:ultrastructure; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004338:Drug Combinations; D004853:Epoxy Resins / Q000627:therapeutic use; D005898:Glass / Q000737:chemistry; D006171:Gutta-Percha / Q000627:therapeutic use; D006801:Humans; D007180:Incisor; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D011791:Quartz / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000627:therapeutic use; D012390:Root Canal Therapy; D012821:Silanes / Q000737:chemistry*; D012834:Silver / Q000627:therapeutic use; D014025:Titanium / Q000627:therapeutic use; D019227:Tooth Apex / Q000648:ultrastructure
chemical_list: C103506:Bis-GMA, BPDM, HEMA dental-bonding resin; D003188:Composite Resins; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D004853:Epoxy Resins; C420130:Excite cement; D008689:Methacrylates; C076808:Monobond S; C488490:ParaPost Cement; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012821:Silanes; C009753:fiberglass; C113130:obtura II; D011791:Quartz; D012834:Silver; C028044:epoxy resin AH-26; D006171:Gutta-Percha; D014025:Titanium; D001729:Bismuth