title: Effect of eugenol-based endodontic sealer on the adhesion of intraradicular posts cemented after different periods.
abstract: OBJECTIVE
  This study evaluated in vitro the influence of an eugenol-based sealer (EndoFill) on the retention of stainless steel prefabricated posts cemented with zinc phosphate and resin-based (Panavia F) cements after different periods of root canal obturation, using the pull-out test.
  
  
  METHODS
  Sixty upper canines were decoronated and the roots were embedded in resin blocks. The specimens were distributed into 3 groups, according to the period elapsed between canal obturation and post cementation: Group I - immediately; Group II - 72 h and Group III - 4 months. The groups were subdivided according to the type of cement used for post cementation: A - zinc phosphate and B - Panavia F. Following the experimental periods, specimens were subjected to pullout test in an Instron machine with application of tensile force at a crosshead speed of 0.5 mm/min until post dislodgement. The maximum forces required for post removal were recorded (kN) and means were subjected to statistical analysis by 2-way ANOVA and Tukey-Kramer test (alpha=0.001)
  
  
  RESULTS
  There were statistically significant differences (p<0.01) between the posts cemented with zinc phosphate cement (0.2112 kN) and Panavia F (0.0501 kN). However, no statistically significant differences (p>0.05) were found between the three post cementation periods, regardless of the cement.
  
  
  CONCLUSIONS
  It was concluded that the eugenol-based sealer influenced the tensile strength of the posts cemented with the resin cement, but had no influence on the time waited between root canal obturation and post space preparation/post cementation.
authors.affiliation: Department of Dentistry, University of Ribeirão Preto, SP, Brazil.
authors.forename: Larissa Lustosa Lima
authors.initials: LL
authors.lastname: Dias
authors.forename: Alessandro Rogério
authors.initials: AR
authors.lastname: Giovani
authors.forename: Yara Teresinha Corrêa
authors.initials: YT
authors.lastname: Silva Sousa
authors.forename: Luiz Pascoal
authors.initials: LP
authors.lastname: Vansan
authors.forename: Edson
authors.initials: E
authors.lastname: Alfredo
authors.forename: Manoel Damião
authors.initials: MD
authors.lastname: Sousa-Neto
authors.forename: Silvana Maria
authors.initials: SM
authors.lastname: Paulino
mesh_terms: D002484:Cementation / Q000379:methods*; D003481:Cuspid / Q000473:pathology; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation; D018915:Root Canal Preparation; D013193:Stainless Steel / Q000737:chemistry; D013314:Stress, Mechanical; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D019553:Tooth, Nonvital / Q000473:pathology; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry*; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D003722:Dental Alloys; C438843:Panavia-Fluoro; D019279:Resin Cements; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C074417:Endo-Fill; D013193:Stainless Steel; D015036:Zinc Phosphate Cement