BACKGROUND The purpose of this study was to investigate the consistency of working length control between hand instrumentation in comparison to engine driven Mtwo nickel-titanium rotary files. MATERIAL AND METHODS Forty extracted maxillary molars were selected and divided onto two parallel groups. The working lengths of the mesiobuccal root canals were estimated. The teeth were fixed in a pha...

Since instrumentation of the apical foramen has been suggested for cleaning and disinfection of the cemental canal, selection of the file size and position of the apical foramen have challenging steps. This study analyzed the influence of apical foramen lateral opening and file size can exert on cemental canal instrumentation. Thirty-four human maxillary central incisors were divided in two gro...

The idea of the hybrid concept is to combine instruments of different file systems and use different instrumentation techniques to manage individual clinical situations to achieve the best biomechanical cleaning and shaping results and the least procedural errors. The hybrid concept combines the best features of different systems for safe, quick, and predictable results. Several hybrid instrume...

INTRODUCTION The purpose of this in vitro study was to assess the amount of apically extruded debris using rotary and reciprocating nickel-titanium instrumentation systems. METHODS Eighty human mandibular central incisors were randomly assigned to 4 groups (n = 20 teeth per group). The root canals were instrumented according to the manufacturers' instructions using the 2 reciprocating single-...

Objectives This study evaluated the amount of remaining root canal filling materials after retreatment procedures performed by undergraduate students using manual, rotary, and reciprocating techniques through micro-computed tomographic analysis. The incidence of instrument fracture and the instrumentation time were also evaluated. Materials and Methods Thirty maxillary single rooted teeth wer...

background: nickel-titanium (ni-ti) rotary instrument files are important devices in endodontics in root canal preparation. ni-ti file breakage is a critical and problematic issue and irrigation techniques were applied to decrease risk of file failure root. the aim of the present study was to compare the temperature gradient change of different irrigation solutions with ni-ti rotary instrument ...

statement of problem: bacterial agents are the primary cause of pulpoperiapical diseases. therefore, an irrigating solution with proper antibacterial ability should be used to eliminate the bacterial agents during canal instrumentation. purpose: the aim of present study was to compare the antibacterial effect of 0.2% chlorhexidine to 0.5% sodium hypochlorite as canal irrigating solutions. mater...

The purpose of this study was to compare intracanal bacterial reduction on teeth instrumented with 0.04 tapered nickel-titanium (NiTi) rotary instrumentation to bacterial reduction when using a stainless-steel K-file step-back technique using sterile saline irrigation. Forty-eight patients with apical periodontitis were randomly assigned treatment type. The canals were sampled before, during, a...