title: Bacterial leakage in coronally unsealed root canals obturated with 3 different techniques.
abstract: OBJECTIVE
  The purpose of this in vitro study was to evaluate the coronal leakage of microorganisms from saliva into root canals filled by 3 obturation techniques.
  
  
  METHODS
  Obturated canals were mounted in an apparatus and then exposed to human saliva. The number of days required for the entire contamination of the root canal was recorded. Evaluation was carried out for 60 days.
  
  
  RESULTS
  Regardless of the technique used, a significant number of specimens were contaminated after 30 and 60 days. No significant differences were detected among the techniques (P >.05).
  
  
  CONCLUSIONS
  Results indicated that none of the techniques tested could predictably produce a coronal bacteria-tight seal of the root canal after direct saliva challenge.
authors.affiliation: Estácio de Sá University, Department of Endodontics, Rio de Janeiro, Brazil. siqueira@estacio.br
authors.forename: J F
authors.initials: JF
authors.lastname: Siqueira
authors.forename: I N
authors.initials: IN
authors.lastname: Rôças
authors.forename: A
authors.initials: A
authors.lastname: Favieri
authors.forename: E C
authors.initials: EC
authors.lastname: Abad
authors.forename: A J
authors.initials: AJ
authors.lastname: Castro
authors.forename: S M
authors.initials: SM
authors.lastname: Gahyva
mesh_terms: D003763:Dental Leakage / Q000517:prevention & control; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D012389:Root Canal Obturation / Q000379:methods*; D012463:Saliva / Q000382:microbiology; D013997:Time Factors