Effects of different root canal obturation techniques on bacterial penetration

Abstract

Objectives. The aim of this study was to compare bacterial penetration following obturation with 5 different techniques. Study design. 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 Pro Taper Gutta-percha (P), and laterally compacted Pro Taper 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 chi(2) 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. Conclusion. 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. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2006;102:e88-e92)