Abstract
The main goal of this study will be the in vitro comparison of XP EndoFinisher and the ultrasonic passive irrigation (whether or not associatedwith EDTA) on microorganisms and endotoxins within flat radicular rootcanal. Sixty inferior incisive teeth with isthmus will be infected withmicroorganisms for 28 days and instrumented using the R40 systemassociated to 15Ml of a saline physiologica…