D'Ercole, S.Filippakos, A.Leonardo, Renato de Toledo [UNESP]Pameijer, C. H. [UNESP]Tripodi, D.2014-05-202014-05-202012-07-01Journal of Biological Regulators & Homeostatic Agents, v. 26, n. 3, p. 545-552, 2012.0393-974Xhttp://hdl.handle.net/11449/16700The aim of this ex vivo study was to evaluate bacterial penetration after filling root canals using 3 different techniques. Three experimental groups of 25 teeth each, obturated with lateral-warm-vertical condensation of gutta-percha, Microseal technique and EndoREZ (R) system, respectively, were tested in a split chamber model system using Enterococcus faecalis and monitored for 180 days to determine bacterial penetration. A statistical analysis was performed using the Kaplan-Meier method. Median survival time was 25 days for Microseal system, 41 for lateral-warm-vertical condensation and 81 for EndoREZ (R). Significant differences were demonstrated between Microseal and EndoREZ (R) (p<0.001) and between Microseal and lateral-warm-vertical condensation technique (p<0.05). No statistically significant differences were observed between EndoREZ (R) and lateral-warm-vertical condensation. After 180 days of assessment, 20% of the EndoREZ (R) samples resisted bacterial penetration and furthermore, the EndoREZ (R) system has the potential to be a filler system compatible with other currently used systems.545-552engresin sealergutta-perchafilling methodleakagebacteriabiocompatibilityArtigoWOS:000310192000025Acesso restrito