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Electronic apex locater

K Vidya Bhat, Prakashchandra Shetty, Latha Anandakrishna
AIMS: The purpose of this study was to evaluate the accuracy of a new-generation electronic apex locator (iPex) to determine working length in primary teeth with or without root resorption as compared with the conventional radiographic method. MATERIALS AND METHODS: A sample of 30 primary posterior teeth which are indicated for pulpectomy were selected for the study. After obtaining the informed consent from the parents, local anesthesia was administered. Access cavity was prepared with no...
January 2017: International Journal of Clinical Pediatric Dentistry
Rüstem Kemal Sübay, Özlem Kara, Melike Ordulu Sübay
OBJECTIVE: The objective of this study is to evaluate the performance of four electronic root canal length measurement devices (ERCLMDs) [Root ZX, Raypex 6, ProPex II, and VDW Gold with ERCLMD] in wet and dry root canals with different major foramen diameters, in association with three file positions within the final 1 mm of canals. MATERIALS AND METHODS: Fifty roots were divided into five groups that were instrumented apically to the terminus diameter using K-files 15, 20, 30, 40, and 60...
March 29, 2017: Acta Odontologica Scandinavica
Hamid Jafarzadeh, Masoud Beyrami, Maryam Forghani
INTRODUCTION: The purpose of this in vitro study was to compare the accuracy of working length determination using the apex locator versus conventional radiography in C-shaped canals. METHODS AND MATERIALS: After confirming the actual C-shaped anatomy using cone-beam computed tomography (CBCT), 22 extracted C-shaped mandibular second molars were selected and decoronated at the cemento-enamel junction. The actual working length of these canals were determined by inserting a #15 K-file until the tip could be seen through the apical foramen and the working length was established by subtracting 0...
2017: Iranian Endodontic Journal
Bruno Carvalho de Sousa, Fábio de Almeida Gomes, Cláudio Maníglia Ferreira, Márcia Maria de Negreiros Pinto Rocha, Eduardo Bede Barros, Diana Santana de Albuquerque
Biofilms are the main cause of endodontic failures. Even the best executed endodontic treatment can fail, when the infection is resistant to treatment or when it is located in inaccessible areas, such as the external surface of the root apex. The purpose of this study was to evaluate, by scanning electron microscopy, the presence of bacterial biofilm on endodontically treated teeth considered clinical failures and suitable for apical surgery. Root apices were collected from 20 teeth undergoing apical surgery and one negative control and analyzed under SEM...
February 5, 2017: Microscopy Research and Technique
Demet Altunbaş, Alper Kuştarcı, Mustafa Toyoğlu
INTRODUCTION: The aim of this study was to assess the accuracy of the Dentaport ZX (Morita Co, Kyoto, Japan) and the Rootor (Meta Biomed, Cheongwon-gun, Korea) electronic apex locators (EALs) in detecting root perforations in dry conditions and in the presence of the following irrigation solutions: 2.5% sodium hypochlorite (NaOCl), 0.9% saline solution (NaCl), and 17% EDTA. METHODS: Twenty extracted, single-rooted human teeth were perforated artificially in the middle section...
March 2017: Journal of Endodontics
Funda Yılmaz, Kıvanç Kamburoğlu, Buğra Şenel
INTRODUCTION: The aim of this study was to evaluate the accuracy of working length determination by using an electronic apex locator, periapical radiography, and cone-beam computed tomographic (CBCT) imaging obtained at different voxel sizes and field of views (FOVs) in extracted human teeth. METHODS: Thirty extracted human mandibular premolar teeth were used. The electronic working length measurements were performed by using an electronic apex locator (Root ZX; J Morita Corp, Kyoto, Japan)...
January 2017: Journal of Endodontics
Roy George
Data sourcesCochrane Central Register of Controlled Trials, Medline, Embase and Scopus databases.Study selectionStudies that reported the precision of electronic apex locators (EALs) in locating the apical constriction (AC) in primary root canal treatment of human teeth compared with a histologic evaluation of the AC were considered.Data extraction and synthesisData were extracted and quality assessed independently by two reviewers.ResultsTen studies were included, reporting on 1105 EAL measurements. Seven studies were considered to be at high risk of bias and three at low risk...
2016: Evidence-based Dentistry
Jaume Miranda-Rius, Eduard Lahor-Soler, Lluís Brunet-Llobet, Xavier Sabaté de la Cruz
Patients with cardiac implantable electrical devices should take special precautions when exposed to electromagnetic fields. Proximity to equipment used in clinical dentistry may cause interference. This study evaluated in vitro the risks associated with different types/makes of cardiac devices and types of dental equipment. Six electronic dental tools were tested on three implantable cardioverter defibrillators and three pacemakers made by different manufacturers. Overall, the risk of interference with the pacemakers was 37% lower than with the implantable cardioverter defibrillators...
December 2016: European Journal of Oral Sciences
Maciej Janeczek, Piotr Kosior, Dagmara Piesiak-Pańczyszyn, Krzysztof Dudek, Aleksander Chrószcz, Agnieszka Czajczyńska-Waszkiewicz, Małgorzata Kowalczyk-Zając, Aleksandra Gabren-Syller, Karol Kirstein, Aleksandra Skalec, Ewelina Bryła, Maciej Dobrzyński
Measurements of the root canal during endodontic treatment have a significant influence on the course of the therapeutic process as well as on its final result in both human and veterinary medicine. The apical constriction should be the termination point for the preparation and filling of the root canal. This research was conducted with the use of a Septodont kit consisting of a small chamber filled with the examined solution in which a healthy second incisor was placed. The step back method was applied for the root canal preparation and master apical file of 30 was used...
2016: BioMed Research International
Javad Sadeghinezhad, Zahra Tootian, Faezeh Javadi
This study was carried out to describe the anatomical, histological and mucinous histochemical characteristics of the tongue in the Persian squirrel. This species is a rodent distributed all over the Middle East and recently has been considered a companion animal. Anatomical observations showed the median sulcus on the apex and absence of a lingual prominence in the body. Light and scanning electron microscopy showed that the filiform papillae cover the entire dorsal surface of the tongue, and their sizes increased approaching the root...
August 26, 2016: Anatomical Science International
Yakup Üstün, Tuğrul Aslan, Ahmet Ercan Şekerci, Burak Sağsen
INTRODUCTION: This study evaluates the endodontic working-length measurements in teeth with large periapical lesions and persistent intracanal exudate by using preexisting cone-beam computed tomography (CBCT). It compares the measurements with clinical root canal lengths determined by using 2 electronic apex locators. METHODS: All patients had undergone a CBCT scan independent of the present study and needed root canal treatment of at least 1 tooth visible in the field of view...
September 2016: Journal of Endodontics
André Luiz Gomide de Morais, Ana Helena Gonçalves de Alencar, Cyntia Rodrigues de Araújo Estrela, Daniel Almeida Decurcio, Carlos Estrela
INTRODUCTION: The purpose of this clinical study was to compare the accuracy of working length (WL) determination using cone-beam computed tomography (CBCT), conventional periapical radiographies and electronic apex locator. METHODS AND MATERIALS: This study was conducted during root canal treatment of 19 patients with a total of 30 single-rooted teeth diagnosed with apical periodontitis. After taking the initial parallel periapical radiographies, the initial file was advanced into the canal until the WL was detected by the apex locator...
2016: Iranian Endodontic Journal
Joshua C D Long, Ervin Fodor
UNLABELLED: The polymerase basic 2 (PB2) subunit of the RNA polymerase complex of seasonal human influenza A viruses has been shown to localize to the mitochondria. Various roles, including the regulation of apoptosis and innate immune responses to viral infection, have been proposed for mitochondrial PB2. In particular, PB2 has been shown to inhibit interferon expression by associating with the mitochondrial antiviral signaling (MAVS) protein, which acts downstream of RIG-I and MDA-5 in the interferon induction pathway...
October 1, 2016: Journal of Virology
Ahsan Abdullah, Neerja Singh, Monika S Rathore, Shobha Tandon, Balakrishnan Rajkumar
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 electronic apex locators and RVG separately. The data were then subjected to statistical analysis...
April 2016: International Journal of Clinical Pediatric Dentistry
Lucila Piasecki, Everdan Carneiro, Ulisses Xavier da Silva Neto, Vânia Portela Ditzel Westphalen, Christian Giampietro Brandão, Gianluca Gambarini, Adham A Azim
INTRODUCTION: The aim of this study was to compare the accuracy of 2 electronic apex locators (EALs), Apex ID (SybronEndo, Glendora, CA) and Root ZX (J. Morita, Tokyo, Japan), by means of micro-computed tomographic (micro-CT) imaging and to determine anatomic variations that may affect their accuracy. METHODS: The root canal length (RCL) and working length (WL) of 33 single-rooted premolars were measured using a visual method, 3-dimensional micro-CT reconstructions, and 2 different EALs...
August 2016: Journal of Endodontics
Yanan Hao, Christopher H Dietrich, Wu Dai
Mouthparts are among the most important sensory and feeding structures in insects and comparative morphological study may help explain differences in feeding behavior and diet breadth among species. The spotted lanternfly Lycorma delicatula (White) (Hemiptera: Fulgoromorpha: Fulgoridae) is a polyphagous agricultural pest originating in China, recently established and becoming widespread in Korea, and more recently introduced into eastern North America. It causes severe economic damage by sucking phloem sap and the sugary excrement produced by nymphs and adults serves as a medium for sooty mold...
2016: PloS One
Song-Yi Lee, Myeong-Gyun Kang, Jong-Seok Park, Geunsik Lee, Alice Y Ting, Hyun-Woo Rhee
Deciphering the sub-compartmental location of a given protein of interest may help explain its physiological function, but it can be challenging to do using optical or biochemical methods. Imaging with electron microscopy (EM) can provide highly resolved mapping of proteins; however, EM requires complex sample preparation and a specialized facility. Here, we use engineered ascorbate peroxidase (APEX)-generated molecular labeling patterns to provide information regarding intracellular microenvironments in living cells...
May 24, 2016: Cell Reports
Dan Bruellmann, Steven Sander, Irene Schmidtmann
BACKGROUND: The endodontic working length is commonly determined by electronic apex locators and intraoral periapical radiographs. No algorithms for the automatic detection of endodontic files in dental radiographs have been described in the recent literature. METHOD: Teeth from the mandibles of pig cadavers were accessed, and digital radiographs of these specimens were obtained using an optical bench. The specimens were then recorded in identical positions and settings after the insertion of endodontic files of known sizes (ISO sizes 10-15)...
May 1, 2016: Computers in Biology and Medicine
A Kfir, N Blau-Venezia, I Tsesis, T Goldberger, Z Metzger
AIM: To examine whether local anaesthesia is required for treating teeth with necrotic pulps (TNP) and retreatment cases (RCs) associated with periapical lesions. METHODOLOGY: Root canal treatment was performed in TNP and RCs without the administration of local anaesthesia. Patients were assured that if they experienced pain, local anaesthesia would be provided. Eighty canals, 40 TNP and 40 RCs, were included in the study. Two length measurements were performed: one using an electronic apex locator (EAL), which was defined as the electronic length (EL), and the second, the length at which the patient first reported that a size 15 file was touching the periapical tissues, which is defined as the periodontal length (PL)...
March 19, 2016: International Endodontic Journal
Labishetty Vinay Kumar, Natta Sreelakshmi, E Rajendra Reddy, M Manjula, S Thabitha Rani, Aduri Rajesh
PURPOSE: This study's purposes were to: (1) compare the accuracy of conventional radiography (CR), radiovisiography (RVG), and the Root ZX mini apex locator (EAL) in determining the working length in primary teeth; and (2) determine the effect of wet/dry conditions on the accuracy of the EAL. METHODS: Twenty-two children (six to 15 years old), with 41 root canals of primary teeth with or without resorption indicated for extraction, were selected. CR and RVG were used to determine the working length, followed by EAL, according to the manufacturer's instructions in both dry and wet fields (saline)...
January 2016: Pediatric Dentistry
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