title: Application of resin adhesive on the surface of a silanized glass fiber-reinforced post and its effect on the retention to root dentin.
abstract: BACKGROUND
  In this study, the effect of different post surface treatments on the retention of glass fiber-reinforced post to root dentin was evaluated. The hypotheses tested were (1) post silanization would not improve its retention and (2) the application of silane plus resin adhesive on the post would enhance its retention.
  
  
  METHODS
  After root canal preparation, 4 different protocols (n = 5) of post surface treatment were evaluated, combined with or without silane (Silane coupling agent) and adhesive (Scotchbond Multipurpose): silane + adhesive (S/A), only silane, only adhesive, or no treatment (control). RelyX ARC was used for post cementation. Next, specimens were subjected to push-out bond strength testing, and data were analyzed by two-way analysis of variance and Tukey test (P < .05).
  
  
  RESULTS
  S/A showed higher bond strength than other protocols in the middle and coronal root regions (P < .001). Only silane did not enhance post retention compared with control (P > .05). The root dentin region influenced bond strength results only in the S/A group.
  
  
  CONCLUSIONS
  Whereas silanization as the only post surface treatment did not improve retention, the combination of silane plus resin adhesive enhanced post retention to dentin in the middle and coronal root regions.
authors.affiliation: Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
authors.forename: Fernanda Weingartner
authors.initials: FW
authors.lastname: Machado
authors.affiliation: Control and Developmental Center of Biomaterials (CDC-Bio), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
authors.forename: Mayara
authors.initials: M
authors.lastname: Bossardi
authors.affiliation: Control and Developmental Center of Biomaterials (CDC-Bio), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
authors.forename: Tatiana dos Santos
authors.initials: Tdos S
authors.lastname: Ramos
authors.affiliation: Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
authors.forename: Lisia Lorea
authors.initials: LL
authors.lastname: Valente
authors.affiliation: Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil. Electronic address: eliseumunchow@gmail.com.
authors.forename: Eliseu Aldrighi
authors.initials: EA
authors.lastname: Münchow
authors.affiliation: Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil; Control and Developmental Center of Biomaterials (CDC-Bio), Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil.
authors.forename: Evandro
authors.initials: E
authors.lastname: Piva
mesh_terms: D000269:Adhesives / Q000737:chemistry*; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D002417:Cattle; D002484:Cementation / Q000379:methods; D001840:Dental Bonding / Q000295:instrumentation / Q000379:methods; D003786:Dental Pulp Cavity; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000737:chemistry; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005898:Glass / Q000737:chemistry*; D007180:Incisor; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry; D018915:Root Canal Preparation / Q000379:methods; D012821:Silanes / Q000737:chemistry*; D013314:Stress, Mechanical; D019227:Tooth Apex; D014092:Tooth Root / Q000737:chemistry / Q000187:drug effects*
chemical_list: D000269:Adhesives; D017220:Dentin-Bonding Agents; D019279:Resin Cements; D012821:Silanes; C009753:fiberglass; D017438:Bisphenol A-Glycidyl Methacrylate; C033930:Silar (3M); C041330:Scotchbond
keywords: Push-out test; root canal; silanization; surface treatment