title: Tensile bond strength of cast commercially pure titanium dowel and cores cemented with three luting agents.
abstract: OBJECTIVE
  The purpose of this study was to compare the tensile strength of commercially pure titanium dowels and cores cemented with zinc phosphate or resin cements.
  
  
  METHODS
  Twenty-one extracted human canines were endodontically treated. The root preparations were accomplished using Largo reamers (10mm in depth and 1.7 mm in diameter). Acrylic resin patterns for the dowel and cores were made, and specimens were cast in commercially pure titanium (n=7) and divided in three groups: TZ-CP Ti dowels luted with zinc phosphate luting agent, TP-CP Ti dowels luted with Panavia F and TR-CP Ti dowels luted with RelyX U100. Tensile strengths were measured in a universal testing machine at a crosshead speed of 0.5mm/min. The results (N) were statistically analyzed by ANOVA and Tukey tests (α=0.01).
  
  
  RESULTS
  The ANOVA indicated that there were significant differences among the groups tested. A Tukey multiple comparison procedure was performed and revealed statistically significant higher retention values for the dowel luted with RelyX U100 when compared with zinc phosphate or Panavia F.
  
  
  CONCLUSIONS
  Cast commercially pure titanium dowels and cores fixed with RelyX U100 cement presented superior bond strength retention when compared to zinc phosphate and Panavia F.
authors.affiliation: Department of Dental Materials and Prosthodontics, Dental School of Ribeirão Preto, University of São Paulo, Brazil.
authors.forename: Karina Albino
authors.initials: KA
authors.lastname: Lencioni
authors.forename: Luiz Ricardo
authors.initials: LR
authors.lastname: Menani
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: Macedo
authors.forename: Ricardo Faria
authors.initials: RF
authors.lastname: Ribeiro
authors.forename: Rossana Pereira
authors.initials: RP
authors.lastname: de Almeida
mesh_terms: D003738:Dental Cements; D006801:Humans; D066298:In Vitro Techniques; D010710:Phosphates; D011176:Post and Core Technique / Q000592:standards*; D013718:Tensile Strength; D014025:Titanium; D017967:Zinc Compounds
chemical_list: D003738:Dental Cements; D010710:Phosphates; D017967:Zinc Compounds; C043952:zinc phosphate; D014025:Titanium