Bacterial microleakage and post space timing for two endodontic sealers: an in vitro study.

摘要: AIM The effects of immediate versus delayed post space preparation on the apical seal using resin and zinc oxide eugenol (ZOE) sealers were compared by a bacterial leakage model. METHODOLOGY Eighty-six premolars randomly assigned to four experimental groups 20 teeth. Three teeth each control group, either positive (filled only with guttapercha) or negative (not obturated but root surfaces completely covered). Obturation was achieved gutta-percha ZOE sealer lateral condensation technique. Post prepared immediately week later, while had been stored in 100 percent relative humidity at 37 degrees C. inserted into plastic vials suspended glass bottles. All covered cyanoacrylate layers nail varnish 3 mm sterilized gamma rays. Phenol red lactose broth inoculated vials. Staphylococcus epidermidis introduced canal access Turbidity (discoloration) evaluated daily for period 70 days. data analyzed statistically Pearson Chi Square two ways ANOVA 45 days RESULTS When depth time considered, mean showed no differences between AH26 Dorifil (p = 0.37 p 0.217, respectively). In days, considering number leakage, there significant difference 0.028). No present 0.14). CONCLUSION According results this study despite type sealer, did not achieve better sealing than preparation. Resin least leaking it made