title: Fluid filtration evaluation of 3 obturation techniques.
abstract: OBJECTIVE
  To evaluate coronal leakage and apical material extrusion of 3 obturation techniques.
  
  
  METHODS
  The coronal part of 60 freshly extracted human maxillary central incisors was removed, leaving roots 10 mm in length. After instrumentation by hand K-files and smear layer removal, the 60 roots were divided randomly into 3 groups. The roots of each group were obturated using different obturation techniques. The obturation techniques tested were cold lateral condensation, System B, and Thermafil. Leakage measurements were accomplished using fluid filtration methodology. Filling material extrusion was recorded using a yes or no statement. Results were subjected to statistical analysis using chi-square tests.
  
  
  RESULTS
  Fluid filtration results revealed no significant differences among the 3 techniques tested 48 hours after obturation (P >.05). Thermafil tended to extrude significantly more material beyond the apex (P <.05).
  
  
  CONCLUSIONS
  The 3 obturation techniques are equally effective at sealing the root canals. Thermafil's tendency for slight material extrusion should be considered when obturating canals with insufficient apical constriction.
authors: Department of Endodontics, Dental School of Athens, Athens, Greece.
authors: Evangelos
authors: E
authors: Kontakiotis
authors: Antonis
authors: A
authors: Chaniotis
authors: Maria
authors: M
authors: Georgopoulou
mesh_terms: D016009:Chi-Square Distribution; D003763:Dental Leakage / Q000517:prevention & control*; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000517:prevention & control*; D006801:Humans; D007180:Incisor; D012389:Root Canal Obturation / Q000379:methods*