introduction: the purpose of this study was to evaluate the sealing ability of dentin bonding agents in root canals obturated with gutta-percha and mta. methods: forty-five single rooted human premolar teeth were decoronated so that remaining root portions were 12 mm in length. the samples were divided randomly into three experimental (n=13) and two control groups (n=3). all teeth were instrume...

303 T JOB Spring (the acronym is formed from the names of the last three authors of this article) was developed to facilitate correction of partial canine-first premolar transposition in the maxillary arch.1-6 This new device helps move the premolar toward the center of the palate to allow mesial displacement of the canine. The spring is attached to the archwire and can be activated either outs...

Aim: To evaluate the incidence of apical root crack formation after canal preparation using ProTaper Universal (PTU), Next (PTN) and Gold (PTG) rotary file systems compare at various instrumentation lengths. Subjects Methods: One hundred single rooted extracted mandibular premolar teeth were mounted in acrylic resin blocks simulating periodontal ligament. The divided into four groups. Group I w...

The maxillary first premolar may present large number of anatomic variations. The clinician should be aware of the configuration of the pulp system. Maxillary first premolars usually have two canals. The incidence of three canals in these teeth is quite rare. This case report presents the diagnosis and clinical management of a maxillary first premolar with two distinct canals in the apical thir...

Mandibular second premolars with three canals (Type V, Vertucci) and separate foramina are very rare. The anatomy of the pulp chamber floor in these premolars usually reveals one lingual and two buccal orifices at the same level. This case report describes a second premolar with three canals and an unusual pulpal floor anatomy with one distobuccal and one distolingual orifice at the same level ...

AIM The aim of the present study was to evaluate the efficiency of different endodontic irrigants in the removal of smear layer through scanning electron microscopic image analysis. MATERIALS AND METHODS The present in vitro study was carried out on 45 single-rooted extracted human mandibular premolar teeth with single canal and complete root formation. Teeth were randomly assigned to three g...

This article describes a clinical case of mandibular second premolar with three separated canals in apical third of the root that are diagnosed and endodontically treated. Sound knowledge of root canal anatomy and morphology, tactile examination of canal walls, critical interpretation of radiographs and high magnification examination are essential elements of success in complicated root canal t...