title: Effect of operator experience on the outcome of fiber post cementation with different resin cements.
abstract: OBJECTIVE
  To evaluate the influence of operator experience (dentist vs student) and cementation system (Adper Scotchbond Multi-Purpose [SBMP] + RelyX ARC [1]; Adper Single Bond 2 [SB] + RelyX ARC [2] and RelyX U100 [3]) on the push-out bond strength (BS) of fiber post to radicular dentin.
  
  
  METHODS
  The roots of 48 extracted human maxillary central incisors were prepared and divided into six groups (n=8), according to combination of the above factors. Glass fiber posts were cemented in accordance with the instructions of the manufacturer of each cementation system. After water storage at 37°C for one week, the roots were cross-sectioned into six 1-mm thick slices and the push-out test was performed (0.5 mm/min). Data were statistically analyzed by two-way analysis of variance and Tukey tests (α=0.05). The BS results obtained by dentist and student for each cementation system were compared using the Student t-test (α=0.05).
  
  
  RESULTS
  Higher BS means were observed for the expert operators, irrespective of the cementation system used (p=0.006). RelyX U100 showed the highest bond strength, but it did not differ from SBMP + RelyX ARC. The Student t-test revealed that only RelyX U100 was not affected by the operator's experience.
  
  
  CONCLUSIONS
  Within the limitations of this in vitro study, it can be concluded that the self-adhesive cement RelyX U100 showed the highest bond strength to the root canal in the student's group, and its performance was not affected by the operator's experience.
authors.forename: G M
authors.initials: GM
authors.lastname: Gomes
authors.forename: O M M
authors.initials: OM
authors.lastname: Gomes
authors.forename: A
authors.initials: A
authors.lastname: Reis
authors.forename: J C
authors.initials: JC
authors.lastname: Gomes
authors.forename: A D
authors.initials: AD
authors.lastname: Loguercio
authors.forename: A L
authors.initials: AL
authors.lastname: Calixto
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000008:administration & dosage / Q000627:therapeutic use; D002983:Clinical Competence; D001840:Dental Bonding / Q000379:methods / Q000592:standards; D003738:Dental Cements / Q000627:therapeutic use; D003815:Dentists / Q000592:standards; D006801:Humans; D007180:Incisor; D011092:Polyethylene Glycols / Q000008:administration & dosage / Q000627:therapeutic use; D011109:Polymethacrylic Acids / Q000008:administration & dosage / Q000627:therapeutic use; D011176:Post and Core Technique; D019279:Resin Cements / Q000627:therapeutic use*; D013335:Students, Dental
chemical_list: C554641:Adper single bond 2; D003738:Dental Cements; D011109:Polymethacrylic Acids; C483701:Rely X Unicem; C462240:RelyX ARC; D019279:Resin Cements; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate