The Effectiveness of Three Irrigation Systems in the Enterococcus faecalis Reduction after Instrumentation with a Reciprocating Instrument.

Objective:  This study aimed to analyze the effectiveness of three irrigation systems: EndoActivator, passive ultrasonic irrigation (PUI), and Easy Clean in the reduction of , after instrumentation with the reciprocating system, through microbiological collection and culture method.

Materials And Methods:  A total of 60 extracted human lower premolars were used and standardized at 16 mm in length. The teeth were accessed, contaminated with , and incubated for 21 days at 37°C.

evaluation of painful symptomatology after endodontic treatment with or without the use of photodynamic therapy.

Context: Postoperative pain control after endodontic treatment is important to maintain patient comfort.

Aim: The aim of this prospective clinical study was to evaluate the postoperative symptomatology of endodontic treatments performed in a single session, with or without photodynamic therapy (PDT), using Reciproc #40 file in necrotic unirradicular anterior teeth.

Materials And Methods: In a prospective clinical study, 40 teeth indicated for endodontic treatment were treated by a single endodontist according to a preestablished protocol.