INTRODUCTION The purpose of this study was to evaluate the incidence of dentinal defects after root canal preparation with reciprocating instruments (Reciproc and WaveOne) and rotary instruments. METHODS One hundred human central mandibular incisors were randomly assigned to 5 groups (n = 20 teeth per group). The root canals were instrumented by using the reciprocating single-file systems Rec...

OBJECTIVE The aim of this study was to compare the fracture strength of roots instrumented with three different single file rotary systems in curved mesial root canals of maxillary molars. MATERIALS AND METHODS Curvatures of 25°-35° on mesial roots of 60 maxillary molar teeth were sectioned below the cementoenamel junction to obtain roots 11 mm in length. The roots were balanced with respect ...

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...

Full Text PDF Images References Journal of Endodontics Volume 39, Issue 10 , Pages 1226-1233, October 2013 A Survey of Dentists' Preferences for the Treatment of Teeth with Apical Periodontitis Amir Azarpazhooh, DDS, MSc, PhD , Thuan Dao, DDS, MSc, PhD, Rafael Figueiredo, DDS, MSc, Murray Krahn, MD, MSc, Shimon Friedman, DDS Abstract Introduction This study surveyed the preferences of Ontario, ...

Nickel-titanium engine-driven rotary instruments are used increasingly in endodontic practice. One frequently mentioned problem is fracture of an instrument in the root canal. Very few studies have been conducted on torsional characteristics of these instruments, and none has been done under dynamic conditions. The purposes of this study were to measure the torque generated and the apical force...

AIM The aim of the present study was to compare the remaining dental thickness (RDT) in the mesiobuccal root of mandibular first molars at 3 and 7 mm from the anatomic apex after instrumentation with ProTaper, light speed LSX, K3 and M2 and to compare with that of K-files. MATERIALS AND METHODS In this study, 60 extracted, untreated human mandibular first molars with fully formed apices, with...

introduction: preparation techniques and instruments produce and push debris out of canals. this can induce inflammation within the periapical area. therefore, instrumentation that causes less extrusion of debris is more desirable. the purpose of this in vitro study was to evaluate the quantity of debris extruded from the apical foramen during root canal preparation by using one hand, and two r...