Effetto antimicrobico di due nuovi irriganti nei confronti dell'Enterococcus faecalis: studio comparativo in vitro

Introduction: the antibacteric action of irri- gants in the endodontic therapy could be in- hibited by many factors. The most important one is the presence of bacterial strain (e.g. En- terococcus faecalis) resistant to irrigants and intracanal dressing action. Two new irrigants, based on antibiotics, Tetraclean and Bio Pure MTAD have been recently proposed to face this problem. The aim of this study is to com- pare the antibiotic action of these new irrig- ants. Methodology: according to NCCLS guide- lines the MIC of Tetraclean and MTAD against Enterococcus faecalis ATCC 29212 strain were determined, using dilutions from 1:2 to 1:2048. Results: Bio Pure MTAD killed all bacteria until a dilution of 1:256; Tetraclean has shown better results, until 1:1024. Conclusions: both Bio Pure MTAD and Tetr- aclean proved effective antibacteric action as compared to the Enterococcus faecalis strain examined. Tetraclean was better than MTAD. Other in vitro and in vivo studies should be performed to confirm these data.