title: The influence of operator variability on adhesive cementation of fiber posts.
abstract: OBJECTIVE
  The aim of this study was to evaluate the influence of the operator's experience on the outcome of fiber post cementation using an etch-and-rinse acetone-based adhesive.
  
  
  METHODS
  Fifteen human anterior teeth were used in the study. One trained operator performed the endodontic procedures and prepared the roots for the insertion and cementation of the posts. At this point, teeth were divided into 3 groups and distributed to 3 operators to lute the posts: an expert operator (EO), a moderately experienced operator (ME), and an operator with a low level of experience (LE). Quartz fiber posts (DT Light Post #1 or #2, RTD) were used. Posts were cemented using Prime&Bond NT Dual Cure adhesive system (Dentsply Caulk) in combination with the dual-curing resin cement Calibra (Dentsply Caulk). The post retention was assessed with the "thin-slice" push-out test. One-way ANOVA was performed to examine the effect of the operator on push-out strength, followed by post-hoc multiple comparisons using Tukey's test, with the significance level set at alpha = 95%.
  
  
  RESULTS
  The results of push-out strength testing were as follows: EO (12.44+/-3.63 MPa), ME (11.68+/-2.64 MPa), LE (11.18+/-3.12 MPa). No statistically significant differences were determined among the three groups.
  
  
  CONCLUSIONS
  There was no statistically significant difference in the retention measured for fiber posts luted by operators with different levels of clinical experience. Given the parameters of this investigation, the level of operator experience in luting fiber posts does not affect post retention under laboratory conditions.
authors.affiliation: Department of Dental Materials and Restorative Dentistry, Policlinico Le Scotte, University of Siena, Siena, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Simonetti
authors.forename: Ivana
authors.initials: I
authors.lastname: Radovic
authors.forename: Michele
authors.initials: M
authors.lastname: Vano
authors.forename: Nicoletta
authors.initials: N
authors.lastname: Chieffi
authors.forename: Cecilia
authors.initials: C
authors.lastname: Goracci
authors.forename: Francesco
authors.initials: F
authors.lastname: Tognini
authors.forename: Marco
authors.initials: M
authors.lastname: Ferrari
mesh_terms: D000096:Acetone / Q000737:chemistry; D000134:Acid Etching, Dental / Q000379:methods; D002484:Cementation / Q000379:methods*; D002983:Clinical Competence; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D011109:Polymethacrylic Acids / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D011791:Quartz / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D018915:Root Canal Preparation; D012997:Solvents / Q000737:chemistry; D013314:Stress, Mechanical
chemical_list: C433205:Calibra; D003738:Dental Cements; D003764:Dental Materials; D017220:Dentin-Bonding Agents; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D019279:Resin Cements; D012997:Solvents; D000096:Acetone; D011791:Quartz