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Electronic apex locater

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https://www.readbyqxmd.com/read/29740728/transvenous-cardiac-implantable-electronic-device-implantation-in-patients-with-persistent-left-superior-vena-cava-in-a-tertiary-center
#1
Xueying Chen, Ziqing Yu, Jin Bai, Wei Wang, Shengmei Qin, Jingfeng Wang, Zhe Sun, Fei Han, Yangang Su, Junbo Ge
PURPOSE: Persistent left superior vena cava (PLSVC) is rare and often asymptomatic, which might cause difficulties in the implantation of cardiac implantable electronic devices (CIEDs). The aim of this study was to determine the prevalence of PLSVC and to study the clinical characteristics and significance of PLSVC in patients with CIED implantation. METHODS: Thirty-three patients with PLSVC were collected from 7047 CIED recipients over recent 10 years in our center...
May 9, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29703619/the-accuracy-of-a-new-cone-beam-computed-tomographic-software-in-the-preoperative-working-length-determination-ex-vivo
#2
André Vinícius Kaled Segato, Lucila Piasecki, Marcos Felipe Iparraguirre Nuñovero, Ulisses Xavier da Silva Neto, Vânia Portela Ditzel Westphalen, Gianluca Gambarini, Everdan Carneiro
INTRODUCTION: This study investigates the accuracy of 3D Endo software (Dentsply Sirona, Salzburg, Austria) to determine the working length when using preoperative cone-beam computed tomographic (CBCT) scans of extracted teeth, compared with conventional CBCT software and an electronic apex locator (EAL). METHODS: CBCT scans of 30 premolars were obtained. Using OnDemand3D software (Cybermed, Seoul, Korea), the measurement obtained from the coronal reference to the apical foramen (AF) was recorded as the conventional CBCT length...
April 24, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29681478/deviations-of-mesial-root-canals-of-mandibular-first-molar-teeth-at-the-apical-third-a-micro-computed-tomographic-study
#3
Ali Keles, Cangül Keskin
INTRODUCTION: The present study aimed to quantitatively analyze apical foramen deviations of mesial root canals of mandibular first molar teeth by means of micro-computed tomographic (micro-CT) imaging. METHODS: Micro-CT images of the mesial roots of 109 mandibular first molar teeth with independent mesiobuccal (MB) and mesiolingual (ML) root canals were analyzed. The deviations of the apical foramina of the MB, ML, and middle mesial root canals from the anatomic apex were measured...
April 19, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29667141/triplanar-correction-of-adolescent-idiopathic-scoliosis-by-asymmetrically-shaped-and-simultaneously-applied-rods-associated-with-direct-vertebral-rotation-clinical-and-radiological-analysis-of-36-patients
#4
Cesare Faldini, Fabrizio Perna, Giuseppe Geraci, Francesco Pardo, Antonio Mazzotti, Federico Pilla, Alberto Ruffilli
PURPOSE: Aim of this study was to investigate the effectiveness of a new surgical corrective manoeuvre for adolescent idiopathic scoliosis (AIS) by asymmetrically shaped and simultaneously applied rods and in combination with direct vertebral rotation, to control both the triplanar deformity and the kyphosis apex location. METHODS: We retrospectively reviewed 36 patients who undergo surgical treatment using simultaneous translation on two differently contoured rods, in combination with direct vertebral rotation...
April 17, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29599591/comparison-of-tentative-radiographic-working-length-with-and-without-grid-versus-electronic-apex-locator
#5
Tanikonda Rambabu, Visinigiri Srikanth, Girija S Sajjan, Sirisha Ganguru, Chava Gayatri, K Roja
The apical termination of obturation is the most important factor influencing the success of root canal treatment (RCT). Working length (WL) is the key element in achieving this. Aim: The aim of this study is to compare and evaluate the preoperative estimated WL with conventional radiograph and with grid radiograph, with reference to electronic apex locator (EAL) in single-rooted teeth. Settings and Design: Thirty permanent anterior teeth with complete root formation indicated for RCT were included in this study...
January 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29573115/accuracy-and-consistency-of-electronic-root-canal-length-determination-with-electrically-isolating-rubber-stoppers
#6
Susanne Kowollik, David Sonntag
The aim of this study was to investigate the influence of an isolating silicone stopper on the measuring accuracy and display consistency of three electrometric apex locators. The length of the canal to the major foramen was determined electrometrically using an ISO size 10 file in 20 extracted teeth each with natural crowns (Group I), amalgam fillings (Group II) or base-metal crowns (Group III), The measurements were performed with isolating or conventional silicone stoppers using three different apex locators with a four-level scale consistency rating...
March 23, 2018: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/29525491/correlating-the-depth-of-compensation-to-the-3-d-shape-of-the-breast-to-achieve-homogeneous-dose-distribution-using-the-electronic-tissue-compensation-treatment-technique
#7
Abdulraouf H Alghufaili, Luxshan Shanmugarajah, Lalith K Kumaraswamy
Our study aimed to correlate the overall 3-dimensional (3-D) shape of the breast to the compensation depth to produce a homogeneous dose distribution using the electronic tissue compensation (ECOMP) treatment technique. The study involved creating a number of semioval water phantoms with the diameter of the larger axis representing the breast separation and the shorter axis representing the distance from the chest wall to the apex of the breast. Multiple plans with 2 tangential fields were created for each phantom using different transmission penetration depths (TPDs) to determine the optimum TPD value based on the evaluation of dose uniformity and maximum hot spot...
March 7, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29385637/validation-of-contralateral-premolars-as-the-substrate-for-endodontic-comparison-studies
#8
G F Johnsen, P T Sunde, H J Haugen
AIM: To use micro-CT technology and metrology software to validate the use of contralateral premolars as samples in endodontic comparison studies by comparing them before and after canal instrumentation with one instrumentation system. Furthermore, to determine whether contralateral premolar roots (CPRs) will yield non-significantly different outcomes regarding shaping ability (volume), degree of twisting and three-dimensional shape changes. The null-hypothesis (H0 ) is that there are no differences between the CPRs pre- or post-instrumentation...
January 31, 2018: International Endodontic Journal
https://www.readbyqxmd.com/read/29379097/multi-wavelength-emission-from-a-single-ingan-gan-nanorod-analyzed-by-cathodoluminescence-hyperspectral-imaging
#9
Gunnar Kusch, Michele Conroy, Haoning Li, Paul R Edwards, Chao Zhao, Boon S Ooi, Jon Pugh, Martin J Cryan, Peter J Parbrook, Robert W Martin
Multiple luminescence peaks emitted by a single InGaN/GaN quantum-well(QW) nanorod, extending from the blue to the red, were analysed by a combination of electron microscope based imaging techniques. Utilizing the capability of cathodoluminescence hyperspectral imaging it was possible to investigate spatial variations in the luminescence properties on a nanoscale. The high optical quality of a single GaN nanorod was demonstrated, evidenced by a narrow band-edge peak and the absence of any luminescence associated with the yellow defect band...
January 29, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29308796/giant-gap-plasmon-tip-enhanced-raman-scattering-of-mos-2-monolayers-on-au-nanocluster-arrays
#10
Alexander G Milekhin, Mahfujur Rahaman, Ekaterina E Rodyakina, Alexander V Latyshev, Volodymyr M Dzhagan, Dietrich R T Zahn
In this article, we present the results of a gap-plasmon tip-enhanced Raman scattering study of MoS2 monolayers deposited on a periodic array of Au nanostructures on a silicon substrate forming a two dimensional (2D) crystal/plasmonic heterostructure. We observe a giant Raman enhancement of the phonon modes in the MoS2 monolayer located in the plasmonic gap between the Au tip apex and Au nanoclusters. Tip-enhanced Raman mapping allows us to determine the gap-plasmon field distribution responsible for the formation of hot spots...
February 8, 2018: Nanoscale
https://www.readbyqxmd.com/read/29308517/-comparison-of-the-accuracy-of-measuring-root-canal-working-length-in-3-different-ways
#11
Chang-Xi Lu, Ya-Qin Zhu
PURPOSE: To compare the accuracy of measuring root canal working length with two different electronic apex locators and digital X-ray. METHODS: Ninety patients treated from January 2015 to June 2016 were selected, 232 root canals in total were randomly divided into 3 groups: X-ray group, Raypex5 group and i-root group. The accuracy of working length measured was assessed according to the filling quality of related main tips. The data were analyzed with SPSS19.0 software package for Chi-square test...
October 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29302280/a-smart-rotary-technique-versus-conventional-pulpectomy-for-primary-teeth-a-randomized-controlled-clinical-study
#12
Negar Mokhtari, Alireza-Sarraf Shirazi, Masoumeh Ebrahimi
Background: Techniques with adequate accuracy of working length determination along with shorter duration of treatment in pulpectomy procedure seems to be essential in pediatric dentistry. The aim of the present study was to evaluate the accuracy of root canal length measurement with Root ZX II apex locator and rotary system in pulpectomy of primary teeth. Material and Methods: In this randomized control clinical trial complete pulpectomy was performed on 80 mandibular primary molars in 80, 4-6-year-old children...
November 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29279620/can-active-signals-of-cellphone-interfere-with-electronic-working-length-determination-of-a-root-canal-in-a-dental-clinic-an-in-vivo-study
#13
Umadevi Kiritsinh Gohil, Vaishali V Parekh, Niraj Kinariwala, Kaushal M Oza, Mona C Somani
Objective: To evaluate the interference of active cellphones during electronic working length (EWL) determination of a root canal. Materials and Methods: Thirty patients requiring root canal treatment in the anterior teeth or premolars having single canal and mature apices were selected for this study. Working length determination was done using no. 15 K-file. Electronic apex locators ProPex Pixi and Root ZX mini were used for working length determination. Cellphones iPhone 6s and Xolo Q3000 were evaluated for their interference...
May 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29259362/a-comparative-evaluation-of-accuracy-of-three-electronic-apex-locators-using-histological-section-as-gold-standard-an-ex-vivo-study
#14
Divya Saxena, Suparna Ganguly Saha, Anuj Bharadwaj, Neelam Vijaywargiya, Sandeep Dubey, Shubham Kala
Introduction: The aim of the present study was to comparatively evaluate the accuracy of iRoot, iPex II, and Propex pixi apex locator using histological sections as the gold standard. Materials and Methods: Thirty patients indicated for extraction of single-rooted permanent teeth with single canal system were selected. Working lengths (WLs) of teeth were determined using iRoot, iPex II, and Propex pixi. Teeth were then extracted, and the files were reintroduced to the anatomic apex to measure anatomic canal length (ACL) and fixed at the ACL using flowable composite...
July 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29187169/the-accuracy-of-the-auto-stop-function-of-different-endodontic-devices-in-detecting-the-apical-constriction
#15
David W Christofzik, Andreas Bartols, Mahmoud Khaled, Birte Größner-Schreiber, Christof E Dörfer
BACKGROUND: Electronic apex locators (EALs) are modern devices used to determine the working length during root canal preparation. The newest endodontic motors provide an integrated EAL with auto-stop function to prevent instrumentation beyond the predefined working length during rotary root canal preparation. The aim of this study was to compare the accuracy of the auto-stop function of the VDW.Gold RECIPROC motor (VDW, Munich, Germany), the EndoPilot motor (Schlumbohm, Brokstedt, Germany) and the manual measurement with Raypex 6 (VDW, Munich, Germany) to detect the apical constriction (AC)...
November 29, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29149844/use-of-artificial-primary-teeth-for-endodontic-laboratory-research-experiments-related-to-canal-length-determination
#16
Anna Carolina V Mello-Moura, Carmela R Bresolin, Cacio Moura-Netto, André Ito, Angela T Araki, José Carlos P Imparato, Fausto M Mendes
BACKGROUND: Due to the scarcity of exfoliated/extracted human primary teeth with complete roots, artificial teeth were developed as an alternative to be used for educational and laboratory research purposes. This study aimed to assess the feasibility of using artificial primary teeth for conducting laboratory research through an experiment related to canal length determination, comparing artificial teeth with natural teeth. METHODS: Thirty anterior and 21 posterior artificial teeth, and the same number of natural primary teeth were selected...
November 17, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29098239/-cytocompatibility-of-co-cr-ceramic-alloys-after-recasting
#17
Yu-Feng Hu, Wen-Zhong Jin
PURPOSE: To study the correlation between apical foramen area and accuracy of PropexII electronic apex locator under destroyed apical constriction. METHODS: Forty extracted teeth with single straight root canal were ground down 1 mm in the root tip and placed in 2% liquid agar gel injected into Castro model. The length of root canal was measured by PropexII electronic apex locator. The difference (L) between the electronic length (LP) and actual length was calculated...
June 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28955583/a-comparative-assessment-of-the-accuracies-of-raypex-5-raypex-6-ipex-and-ipex-ii-electronic-apex-locators-an-in-vitro-study
#18
Mugem Asli Gurel, Bagdagul Helvacioglu Kivanc, Adil Ekici
PURPOSE: The aims of this study were to examine the accuracy of iPex II and to compare it with those of Raypex 5, Raypex 6 and iPex electronic apex locators (EALs). MATERIALS AND METHODS: Thirty fresh human mandibular premolar teeth were used in this study. Crown segments were cut and root canals were coronally flared. A #10 K-file was inserted until its tip can be seen within apical foramen to determine actual working length (AWL). Teeth were embedded in alginate and each multi-frequency EALs were randomly tested to determine the electronic working length (EWL)...
2017: Journal of Istanbul University Faculty of Dentistry
https://www.readbyqxmd.com/read/28940563/influence-of-different-sized-files-on-the-accuracy-of-two-electronic-apex-locators
#19
Fernando A Orosco, Guilherme F da Silva, Paulo H Weckwerth, Maria Thereza M Lopes, Alan M R Garcia, Marco Antônio H Duarte, Ivaldo G de Moraes
The aim of this study was to evaluate the impact of different file sizes on the accuracy of two electronic apex locators (EALs). Thirty extracted human single-rooted permanent mandibular incisors were used. A #10 K-file was inserted in the root canal until its end could be observed (using a light microscope) through the apical foramen. One millimetre was subtracted to establish working length (WL). Electronic readings were performed using MiniApex Locator or Root ZX II, from #10 K-file to #130 K-file. Statistical analysis was performed by two-way anova and Tukey test (P ≤ 0...
September 20, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
https://www.readbyqxmd.com/read/28808636/in-vivo-assessment-of-accuracy-of-propex-ii-root-zx-ii-and-radiographic-measurements-for-location-of-the-major-foramen
#20
Fernanda Garcia Tampelini, Marcelo Santos Coelho, Marcos de Azevêdo Rios, Carlos Eduardo Fontana, Daniel Guimarães Pedro Rocha, Sergio Luiz Pinheiro, Carlos Eduardo da Silveira Bueno
OBJECTIVES: The aim of this in vivo study was to assess the accuracy of 2 third-generation electronic apex locators (EALs), Propex II (Dentsply Maillefer) and Root ZX II (J. Morita), and radiographic technique for locating the major foramen (MF). MATERIALS AND METHODS: Thirty-two premolars with single canals that required extraction were included. Following anesthesia, access, and initial canal preparation with size 10 and 15 K-flex files and SX and S1 rotary ProTaper files, the canals were irrigated with 2...
August 2017: Restorative Dentistry & Endodontics
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