Avaliação in vitro da viabilidade de Enterococcus faecalis nos túbulos dentinários após a aplicação de Hipoclorito de sódio 5.25% e Bio-Pure MTAD® e Clorexidina 2%

Abstract

Enterococcus faecalis has been associated to persistent periapical inflamation in clinical situations, with the ability to survive to environments with lack of nutrients, constitute biofilms, resist to chemical-mechanical instrumentation and the medications used inside the root canal. This microorganism and its toxic bioproducts are responsible for the development and persistence of endodontic apical periodontitis. Numerous measures have been described in order to reduce the number of microorganisms in the root canal, including the use of different instrumentation techniques, irrigations regimes and intracanal medications. A great number of in vivo and in vitro approaches have been applied in an effort to determine the efficacy of several endodontic disinfecting agents against the involved microorganisms. The present review of literature aimed to evaluate the efficacy of irrigation solutions: Sodium hypochlorite, Bio-Pure MTAD® and Chlorhexidine, taking as base the results obtained in different investigations. Classical and recent publications, refering each of the three solutions, were used for this comparative study, with the aim of finding the most effective irrigating regime for eradicating Enterococcus faecalis from the root canal system.