Background/Aim. During retreatment, filling material and debris may extrude trigger an inflammatory reaction of periapical tissues. Resilon? has not been investigated in terms solvent use influence on apical extrusion during retreatment. The aim the study was to evaluate amount apically extruded removal using ProTaper (PT), Twisted File (TF), Hedstrom instruments, with without solvent. Methods....

Background: This study aimed to compare the continuous rotation and reciprocating movements of rotary files in achieving apical patency root canal retreatment. Materials Methods: vitro, experimental evaluated 64 extracted mandibular molars. The teeth were prepared up F3 with ProTaper Universal obturated using lateral compaction technique. divided into four groups (n = 16) based on mesiobuccal c...

Aim of the study: To evaluate the efficacy and cleaning ability of Hedstrom files, and ProTaper retreatment instruments in removing gutta-percha from root canals with and without xylene as solvent. Materials and methods: Sixty extracted single rooted human teeth were selected and decoronated, straight access established working length determined 1 mm short of canal, chemomechanical preparation ...

Objective: The purpose of this study was to use confocal laser microscopy analysis evaluate the effectiveness conventional needle irrigation (CNI), EndoActivator (EA), and EDDY during endodontic retreatment.
 Methods: This included 45 maxillary incisor teeth with a single root canal. Root canals were prepared ProTaper Universal files (Dentsply Sirona, Ballaigues, Switzerland) obturated lab...

BACKGROUND Endodontic therapy is considered a series of important and interdependent steps, and failure of any of these steps may compromise the treatment outcome. This study aimed to evaluate the effectiveness of three different rotary systems in removing obturation materials during endodontic retreatment using scanning electron microscopy (SEM) analysis. MATERIAL AND METHODS Thirty-six endo...

Aim The aim of this study is to compare curved root canal preparation between reciprocal rotary files and rotational rotary files in extracted teeth using cone-beam computed tomography (CBCT). The independent variable was the file type (reciprocal vs. rotary), and the primary outcome variable was the centering ratio of distance change after canal preparation. Secondary outcomes were canal trans...

introduction: the preparation of the root canal space includes debridement, shaping and apical preparation. these procedures are challenging and constitute. the recent introduction of automated techniques for canal preparation has created considerable interest. the aim of this study was to test shaping ability of one hand instrumentation (passive step-back technique) and new rotary niti system ...

introduction: the purpose of this in-vitro study was to compare shaping ability of niti rotary mtwo and flexmaster with stainless steel hand k-flexofile in curved root canals of extracted teeth. materials and methods: mesiobuccal canals of 45 mandibular molar teeth were balanced into three groups of 15 each, with respect to the schneider angle, canal access angle, height, dis-tance and radius o...