Unforeseen root fractures during endodontic therapy are often difficult to diagnose and treat. Apex locators have been shown to be accurate in measuring the working lengths of root canals, and it was postulated whether they could also be used to determine the position of root fractures. This study was undertaken to assess the accuracy of two different apex locators in determining the position o...

Knowledge workers frequently lack sufficient expertise to perform work effectively. This paper describes a recently developed expertise locator system based on automated key-phrase identification of experts from electronic mail (e-mail) messages. The paper provides an analysis of the key socio-ethical challenges involved in the implementation and use of the e-mail expertise locator system. Find...

AIMS The aim of this study was to evaluate the effectiveness of two different varieties of electronic apex locators and radiovisiography (RVG) for working length determination in primary teeth. MATERIALS AND METHODS A total of 30 primary teeth indicated for pulpectomy in children aged 3 to 8 years were randomly selected and subjected to working length determination using two varieties of elec...

The success of an endodontic treatment relies on a correct working length determination. The canal terminus must be detected accurately and a precise control of the working length during the endodontic treatment must be maintained. The aim of this study was to investigate the working length determination in vivo with the Quill Apex Locator® for apical limit established at 1 mm short from the ap...

AIM To study the effectiveness of an electronic apex locator (EAL; Justy II; Yoshida Dentcraft, Tokyo, Japan) in locating simulated horizontal and vertical fractures in single roots. METHODOLOGY An EAL was used to measure the distance within the canal of horizontal (n = 31) and vertical (n = 31) fractures, created with a disk in single-rooted teeth. Accuracy of the EAL was evaluated by compar...