Obturation with a Fluid Filtration Method

R e s e a R c h The most important factors for a suc-cessful root canal treatment are bio-mechanical instrumentation of the root canal, disinfection and dissolution of organic matter to eliminate bacterial pathogens, and 3-dimensional obturation of this space.1 In recent years, rotary nickel-titanium (NiTi) instruments have become popular be-cause of their superiority over stainless steel hand files, elasticity and resistance to torsional fracture.2 Moreover, rotary NiTi instruments improve working safety, shorten working time and prepare well-shaped root canals with fewer canal transportations.3,4 Recently, new file designs of rotary NiTi instruments with sharp cutting edges called ProTaper (Dentsply Maillefer, Ballaigues, Switzerland) were introduced. The ProTaper files were specially designed to provide superior flexibility and efficiency, and greater safety. These instruments have a convex tri-angular cross-sectional design, a noncutting safety tip and an advanced flute design that combines multiple tapers within the shaft.3,