title: Effects of different root canal obturation techniques on bacterial penetration.
abstract: OBJECTIVE
  The aim of this study was to compare bacterial penetration following obturation with 5 different techniques.
  
  
  METHODS
  This study was performed on 120 teeth including negative control (n = 10), positive control (n = 10), and experimental groups (n = 100). One hundred teeth were randomly divided into 5 groups of 20 teeth each and obturated with System B (Sb), Lateral Compaction (Lc), Thermafil (T), Single ProTaper Gutta-percha (P), and laterally compacted ProTaper Gutta-percha (PLc). Enterococcus faecalis was used for determination of the bacterial penetration. Evaluation was carried out for 60 days.
  
  
  RESULTS
  At 30 days, the chi2 test showed that the slowest penetration was observed in Group Sb and Group PLc, which were not significantly different from each other. The fastest penetration in the all experimental groups was observed in Group T and Group P, which were not significantly different from one another. Also, there was no statistically significance difference (P > .05) among all groups at 60 days.
  
  
  CONCLUSIONS
  It may be concluded that under the conditions of this study System B and laterally compacted ProTaper Gutta-percha prevent bacterial penetration of the root canal at 30 days. Furthermore, there was no difference among obturation techniques at 60 days.
authors.affiliation: Ondokuz Mayis University, Faculty of Dentistry, Department of Restorative Dentistry, Samsun, Turkey.
authors.forename: Ali Cağin
authors.initials: AC
authors.lastname: Yücel
authors.forename: Alper
authors.initials: A
authors.lastname: Ciftçi
mesh_terms: D015169:Colony Count, Microbial; D003763:Dental Leakage / Q000517:prevention & control*; D013293:Enterococcus faecalis; D006171:Gutta-Percha; D006801:Humans; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*
chemical_list: D012387:Root Canal Filling Materials; D006171:Gutta-Percha