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Endodontics Files

Daniele Angerame, Matteo De Biasi, Francesco Brun, Gianluca Turco, Vittorio Franco
This study assessed the effectiveness of modern endodontic shaping and filling procedures on mesiobuccal roots of maxillary molars with two canals. The canals of 20 mesiobuccal roots were treated with Mtwo rotary files, passive ultrasonic irrigation and Guttafusion obturators. X-ray computed microtomography analysis was carried out prior to treatment, after canal shaping and after canal filling to determine the alterations of the canal volume before and after the instrumentation, the volume of the hard tissue debris, and percentage of the volume occupied by filling materials...
August 16, 2018: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
Manucher Raees Sameye, Amin Mohammad Bahalkeh, Arash Izadi, Ania Jafaryan
Introduction: Accurate measurement of working length of the root canal is an important factor in endodontic treatment, because it determines the level of cleaning and shaping of the canal. This can be performed using numerous methods including conventional, digital and self-developing methods, which are studied in this work. Methods and Materials: In this study, 50 maxillary molars with appropriate conditions for the analysis were collected and their mesiobuccal canal lengths were estimated by three different types of radiographs with and without file...
2018: Iranian Endodontic Journal
Rafaela Cristina Trierveiler Paiva, Caroline Solda, Felipe Vendramini, José Roberto Vanni, Flávia Baldissarelli Marcon, Volmir João Fornari, Mateus Silveira Martins Hartmann
Introduction: Different techniques have been proposed to help achieving apical patency during endodontic treatment and retreatment. The objective of this in vitro study was to compare reestablishment of apical patency in teeth previously subjected to root canal treatment using manual and reciprocating instruments. Methods and Materials: A total of 40 single-rooted extracted human mandibular incisors were selected and prepared using the Hero 642 sequence to 45/0...
2018: Iranian Endodontic Journal
Y J Yang, B X Hou, X M Hou
Objective: To compare the phase transformation behavior, bending property and cyclic fatigue resistance of CM-wire, R-phase and M-wire nickel-titanium endodontic files treated by 3 heat treatment techniques. Methods: Hyflex CM (25 mm, 25#/0.06) made from CM wire, TF (25 mm, 25#/0.06) made from R-phase heat treatment, ProTaper Next X2 (25 mm, tip size 25#/0.06) made from M-wire, Mtwo (25 mm, 25#/0.06) and ProTaper F2 (25 mm, tip size 25#/0.08) made from conventional nickel-titanium wire were chosen. Five of each files were chosen for differential scanning calorimetric (DSC) evaluation ( n= 5)...
August 9, 2018: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Javier L Nino-Barrera, Luis F Gamboa-Martinez, Horacio Laserna-Zuluaga, Jessy Unapanta, Daniela Hernández-Mejia, Carolina Olaya, Diana Alzate-Mendoza
The aims of this study were to analyze whether age, tooth type and sex are related to radiographically visible extrusion of filling material as an unintended outcome in teeth undergoing endodontic treatment with a thermoplastic obturation technique (Calamus® or GuttaCore®) and to determine whether the presence of such overfilling is associated to postoperative pain. We selected 120 teeth with diagnoses involving vital pulp and indication for endodontic treatment. Biomechanical preparation was performed using the Protaper Next® system with X2 or X3 master apical file...
June 2018: Acta Odontológica Latinoamericana: AOL
Mohammad Sabeti, Majid Kazem, Omid Dianat, Nazanin Bahrololumi, Amirreza Beglou, Kasra Rahimipour, Farshad Dehnavi
INTRODUCTION: The susceptibility of endodontically treated teeth (ETT) to fracture is mainly associated with the loss of tooth structure. This study evaluated the effect of the access cavity design and taper preparation of root canals on ETT fracture resistance of maxillary molars. METHODS: For tapering assessment, 30 sound distobuccal roots of maxillary molars were randomly assigned to 1 of 3 groups (n = 10): a .04 taper, a .06 taper, or a .08 taper. Endodontic canal preparations were performed using the Twisted Files rotary system (Kerr Co, Glendora, CA)...
July 23, 2018: Journal of Endodontics
J-H Ha, G De-Deus, A Versluis, S W Kwak, H-C Kim
AIM: To determine the distortional angle and torsional load at the pseudo-elastic limit of Reciproc Blue instruments and to verify the safety of using pre-set dedicated motors designed for use with the original Reciproc instruments. METHODOLOGY: Two torsional conditions of Reciproc R25 and Reciproc Blue R25 were tested using a custom device. The first condition fixed the file tips at 3-mm and repetitively rotated them, with gradually increasing angles, from 10º to 270º, and the resulting torque was recorded (n=15)...
July 24, 2018: International Endodontic Journal
Eleni Krikeli, Georgios Mikrogeorgis, Kleoniki Lyroudia
INTRODUCTION: The objective of this study was to examine the influence of instrument taper on the fracture resistance of endodontically treated roots under in vitro experimental conditions. METHODS: In total, 58 maxillary canines complying with the inclusion criteria were sectioned at approximately 13 mm from the apex. The roots were standardized with respect to the buccolingual-mesiodistal diameter and weight before being randomly distributed into 3 experimental groups (n = 14) and 1 control group (n = 16)...
July 19, 2018: Journal of Endodontics
Thomas Connert, M Truckenmüller, A ElAyouti, F Eggmann, G Krastl, C Löst, R Weiger
OBJECTIVES: The study aimed at assessing, as primary objective, the periapical status and quality of root fillings, and, as secondary objective, the endodontic treatment need of a German urban population in a cross-sectional study 20 years after the first one. MATERIALS AND METHODS: Clinical and radiographic data of 353 patients were evaluated. Descriptive and regression analyses were performed and the endodontic treatment need was calculated. Results were compared with data from the year 1993...
July 18, 2018: Clinical Oral Investigations
Jung-Hong Ha, Asgeir Sigurdsson, Gustavo De-Deus, Antheunis Versluis, Sang Won Kwak, Hyeon-Cheol Kim
This study compares the safety limits and torsional resistances of WaveOne Gold (WOG) and WaveOne (WO) endodontic files while using the original motor. The safety limits for reciprocating angles were tested by measuring the torsional limit before plastic deformation (TLP) after repetitive torsional loading at gradually increasing load, and after single continuous rotation. Statistical analysis was performed by independent t -test at 95% confidence level. The tested specimens were observed under a scanning electron microscope (SEM)...
July 6, 2018: Materials
B Üreyen Kaya, C E Erik, E Sesli Çetin, M Köle, M Maden
AIM: To evaluate the bacterial reduction achieved by WaveOne Gold (Dentsply Sirona Endodontics, Ballaigues, Switzerland), Hyflex EDM (Coltene-Whaledent, Altstätten, Switzerland), and XP-endo Shaper (FKG Dentaire SA, La Chaux-de-Fonds, Switzerland) in canals infected with Enterococcus faecalis. The null hypothesis (H0 ) was that there would be no difference amongst the NiTi systems in reducing the root canal bacterial load. METHODOLOGY: Seventy-four mandibular premolar teeth with straight and round root canals were selected...
July 9, 2018: International Endodontic Journal
H Caballero-Flores, C K Nabeshima, E Binotto, M E L Machado
AIM: To assess the fracture incidence of instruments from single-file reciprocating systems when used by students in an endodontic graduate programme. METHODOLOGY: Dental records and periapical radiographs of patients treated by students on an endodontic graduate programme using reciprocating systems were assessed. Data on tooth type, number of treated root canals, number of fractured instruments, fragment size, angle, radius, arc length and position of root canal curvature where fractures occurred were tabulated for analysis...
July 9, 2018: International Endodontic Journal
Arun Kumar Patnana, Ankita Chugh
The curved and dilacerated roots in the posterior teeth often present the major challenge to the clinicians during the endodontic treatments. The efficient biomechanical preparation is also affected by improper instrumentation in the curved or the constricted canals. The use of conventional instruments and techniques in the dilacerated roots may develop ledges, fractured instruments, and canal blockages which further complicate the endodontic treatments. The introduction of ProTaper Universal rotary instruments has made a significant impact in the biomechanical preparation of root canals systems...
June 2018: Contemporary Clinical Dentistry
P K Thaju Raj, Durga P Mudrakola, Deepak Baby, Rajeev K Govindankutty, Dilu Davis, Thenasseri P Sasikumar, Kranti K R Ealla
AIM: To determine the effectiveness of two different endodontic retreatment systems for the removal of laterally compacted gutta-percha (GP). MATERIALS AND METHODS: Sixty-three freshly extracted human maxillary central incisors were used for the study. The teeth were instrumented with K-flex files and obturated using lateral condensation technique with GP and AH Plus sealer. The teeth were divided into three retreatment groups, each group consisting of 21 teeth...
June 1, 2018: Journal of Contemporary Dental Practice
Amir Arsalan Navabi, Abbas Ali Khademi, Masoud Khabiri, Paridokht Zarean, Parichehr Zarean
Background: Bacteria and their by-products are etiological factors for the failure of endodontic treatment. Reduction of root canal bacterial contamination is one of the chief aims of root canal therapy. The aim of this study was to compare the effects of different rotary file tapers and two irrigation fluids on Enterococcus faecalis counts. Materials and Methods: In this ex vivo study Root canals of 72 human upper lateral incisors were enlarged to ISO #20 K-file...
May 2018: Dental Research Journal
Suparna Ganguly Saha, Rudra Kumar Gupta, Anuj Bhardwaj, Abhinav Misuriya, Mainak Kanti Saha, Amit Singh Nirwan
Aim: The aim of this study is to compare the incidence of postoperative pain using the ProTaper Next (PTN), WaveOne Gold (WOG), and Self-Adjusting File (SAF) systems. Materials and Methods: Two hundred and fourteen patients with irreversible pulpitis were selected for single-visit endodontics. The teeth were blindly assigned to three groups based on the instrumentation system used: Group A (PTN), Group B (WOG), and Group C (SAF). Participants were asked to note the incidence of the pre- and postoperative pain on a visual analog scale at different time intervals...
May 2018: Journal of Conservative Dentistry: JCD
Fabiano Luiz Heggendorn, Aline Guerra Manssour Fraga, Dennis de Carvalho Ferreira, Lucio Souza Gonçalves, Viviane de Oliveira Freitas Lione, Márcia Teresa Soares Lutterbach
Aim: This study describes the biofilm formation and the corrosive capacity of sulfate-reducing bacteria (SRB) on the metallic structure of used endodontic files. Methods: Sulfate-reducing bacteria (SRB) ( Desulfovibrio desulfuricans oral and Desulfovibrio fairfieldensis or D. desulfuricans environmental) were inoculated into the culture media (Postgate C culture medium or modified Postgate E culture medium). The biocorrosive potential of these bacteria will be an important component of a biopharmaceutical under development called BACCOR...
2018: International Journal of Dentistry
Sanjeeb Chaudhary, Archana Gharti, Bhawana Adhikari
Purpose: A key factor affecting the success of endodontic treatment is correct determination of root canal working length (WL). The purpose of this in vivo study was to compare the accuracy of Propex II and iPex II electronic apex locator (EAL) in determining the WL under clinical conditions, to that of radiographic working length (RWL) using stainless steel (SS) and nickel-titanium (NiTi) hand files. Patients and methods: Thirty-seven patients, with 60 anterior teeth (60 canals) scheduled for endodontic treatment participated in this study after ethical approval...
2018: Clinical, Cosmetic and Investigational Dentistry
Sally Ali Tawfik, Marwa Mohamed Azab, Ali Abdellah Abdelrahman Ahmed, Dalia Mukhtar Fayyad
The use of high throughput next generation technologies has allowed more comprehensive analysis than traditional Sanger sequencing. The specific aim of this study was to investigate the microbial diversity of primary endodontic infections using Illumina MiSeq sequencing platform in Egyptian patients. Samples were collected from 19 patients in Suez Canal University Hospital (Endodontic Department) using sterile # 15K file and paper points. DNA was extracted using Mo Bio power soil DNA isolation extraction kit followed by PCR amplification and agarose gel electrophoresis...
2018: International Journal of Microbiology
Sivakami Rethnam Haug, Ane F Solfjeld, Line E Ranheim, Asgeir Bårdsen
INTRODUCTION: The aim of this study was to identify the effect of case difficulty on the number of endodontic mishaps and the number of treatment visits using 2 different instrumentation methods, hand files, and reciprocating engine-driven WaveOne files (Dentsply Maillefer, Ballaigues, Switzerland) in an undergraduate student clinic. METHODS: Endodontic treatment performed by fourth-year dental students using 2 different instrumentation methods was evaluated: hand files and reciprocating engine-driven WaveOne files...
July 2018: Journal of Endodontics
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