title: The adhesive system and root canal region do not influence the degree of conversion of dual resin cement.
abstract: OBJECTIVE
  The aim of this study was to evaluate the influence of two adhesive systems and the post space region on the degree of conversion of dual resin cement and its bond strength to root dentin.
  
  
  METHODS
  One three-step etch-and-rinse (All-bond 2, Bisco) and another one-step self-etch (Xeno III, Dentsply) adhesive systems were applied on 20 (n=10) crownless bovine incisors, at 12-mm-deep post space preparation, and a fiber post (DT Light Post, Bisco) was cemented using a dual cure resin cement (Duo-Link, Bisco). Three transverse sections (3 mm) were obtained, being one from each study region (cervical, middle and apical). The degree of conversion of the dual cure resin cement was determined by a micro-Raman spectrometer. The data (%) were submitted to repeated-measures analysis of variance and Tukey's test (p<0.05).
  
  
  RESULTS
  For both groups, the degree of conversion means (%) (All bond 2cervical = 69.3; All bond 2middle = 55.1; All bond 2apical= 56; Xeno IIIcervical = 68.7; Xeno IIImiddle = 68.8; Xeno IIIapical = 54.3) were not significantly different along the post space regions (p<0.05).
  
  
  CONCLUSIONS
  Neither the adhesive nor the post space region influenced the degree of conversion of the cement layer.
authors.affiliation: Department of Dental Materials and Prosthodontics, São José dos Campos Dental School, São Paulo State University, São José dos Campos, SP, Brazil.
authors.forename: Priscilla Cristoforides
authors.initials: PC
authors.lastname: Pereira
authors.forename: Renata Marques de
authors.initials: RM
authors.lastname: Melo
authors.forename: Carolina
authors.initials: C
authors.lastname: Chaves
authors.forename: Graziela A P
authors.initials: GA
authors.lastname: Galhano
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Bottino
authors.forename: Ivan
authors.initials: I
authors.lastname: Balducci
mesh_terms: D000818:Animals; D002417:Cattle; D001840:Dental Bonding / Q000379:methods; D003786:Dental Pulp Cavity / Q000737:chemistry*; D003804:Dentin / Q000737:chemistry* / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D066298:In Vitro Techniques; D008422:Materials Testing; D058105:Polymerization; D019279:Resin Cements / Q000737:chemistry*; D055116:Self-Curing of Dental Resins; D013059:Spectrum Analysis, Raman; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D017220:Dentin-Bonding Agents; D019279:Resin Cements