PURPOSE To evaluate the efficacy of different obturation techniques in root canals instrumented either by hand or rotary instruments with regard to the percentage of gutta- percha-filled area (PGFA). MATERIALS AND METHODS One hundred and sixty extracted mandibular premolars with single, straight root canals were studied. Root canals were prepared to an apical size of 30 by hand with a modifie...

Success in root canal treatment is achieved after thought cleaning and shaping followed by the complete obturation of root canal system. Such treatment may be performed in root canal systems that do not comply with the normal anatomical features described in standard textbooks. This article describes the conventional root canal treatment on an unusual mandibular second molar with four root-canals.

the use of diagnostic and therapeutic methods for assessing pulmonary vein due to its status as a main source of ectopic beats for the initiation of atrial dysrrythmias is strongly recommended.   we report the case of a 13-year-old girl who was admitted to our hospital with the electrocardiogram manifestation of an ectopic atrial tachycardia. the focus of arrhythmia was inside the right upper p...

The aim of this study was to evaluate the accuracy of five electronic apex locators (EALs) in determining the working length (WL) of teeth after removal of the root canal obturation materials. A total of 32 extracted straight, single-rooted teeth were used. The actual canal length (AL) was determined and the WL was established by subtracting 0.5 mm from the AL. The root canals were instrumented...

OBJECTIVES The aim of this study was to compare in vitro root fracture resistance following root canal filling with AH 26 using lateral condensation, BeeFill, and Thermafil techniques. STUDY DESIGN Eighty extracted human mandibular premolars with similar dimensions were selected. In order to standardize the roots, measurements were taken in two separate regions of the teeth--at the cemento-en...

INTRODUCTION The aim of this study was to assess the radiographic technical quality of root canal therapy performed by fifth year students of Dental School of Hamadan University of Medical Sciences from 2015 to 2016. METHODS AND MATERIALS Four hundred and seventy records of root canal therapies were evaluated. Records with graphies taken as initial, master apical file (MAF), master apical con...

postcholecystectomy clip migration is rare and can lead to complications such as clip-related biliary stones. most of such incidents have been reported as case reports. this study reviews a case of postcholecystectomy clip migration. it can occur at any time but typically occur at a median of 2 years after cholecystectomy. clinical presentations are similar to those with primary or secondary ch...

Background: It is difficult to identify a potential sealant with penetration depth until practically analyzed. A scanning electron microscopy (SEM) overview could better describe the internal picture of the materials sealed to the tooth surface on in vitro experimentation since it being a vital procedure for successful obturation. Hence, this study was undertaken to compare the penetration dept...

context different approaches are routinely applied in the treatment of concomitant cholecystocholedocholithiasis. most patients are treated by preoperative endoscopic sphincterotomy followed by laparoscopic cholecystectomy in a two-stage approach. however one-stage approach carrying out intraoperative endoscopic sphincterotomy (ioes) is emerging as a minimally invasive alternative option. our r...

background: juxta-ampullary diverticulum is an acquisitive disorder generally observed in patients over the age of forty years. the purpose of this study is to evaluate the relationship between this abnormality and the incidence of post-ercp complications. â  materials and methods: this was a case-control cross-sectional study that compared post- ercp complications between patients with juxta-a...