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https://www.readbyqxmd.com/read/28430299/effect-of-retreatment-instruments-on-microcrack-formation-a-microcomputed-tomography-study
#1
Mustafa M Koçak, Neslihan Y Çırakoğlu, Sibel Koçak, Baran C Sağlam, Ersan Çiçek, Sevinç A Türker, Emre Bodrumlu
INTRODUCTION: The purpose of this study was to compare the occurrence of microcracks in teeth prepared with different retreatment systems using microcomputed tomography (micro-CT). METHODS: Forty-two freshly extracted mandibular premolar teeth were used. The root canals were instrumented with stainless steel K-files to an apical size of 35/.02 using the balanced-force technique and were obturated using the passive compaction technique. The specimens were divided into 3 experimental groups according to retreatment system used (n = 14): ProTaper Universal retreatment (PTUR), Mtwo retreatment (MTR), or D-RaCe retreatment (D-RC) systems...
April 4, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28416307/the-efficacy-of-the-waveone-reciprocating-file-system-versus-the-protaper-retreatment-system-in-endodontic-retreatment-of-two-different-obturating-techniques
#2
Ben Jorgensen, Anne Williamson, Rene Chu, Fang Qian
INTRODUCTION: This ex vivo study aimed to evaluate the efficacy of retreating GuttaCore (Dentsply Tulsa Dental Specialties, Tulsa, OK) and warm vertically condensed gutta-percha in moderately curved canals with 2 different systems: ProTaper Universal Retreatment (Dentsply Tulsa Dental) and WaveOne (Dentsply Tulsa Dental). METHODS: Eighty mesial roots of mandibular molars were used in this study. The mesiobuccal canals in each sample were prepared to length with the WaveOne Primary file (Dentsply Tulsa Dental)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416304/micro-computed-tomographic-analysis-of-apical-microcracks-before-and-after-root-canal-preparation-by-hand-rotary-and-reciprocating-instruments-at-different-working-lengths
#3
Bruna Paloma de Oliveira, Andréa Cruz Câmara, Daniel Amancio Duarte, Richard John Heck, Antonio Celso Dantas Antonino, Carlos Menezes Aguiar
INTRODUCTION: This study aimed to compare apical microcrack formation after root canal shaping by hand, rotary, and reciprocating files at different working lengths using micro-computed tomographic analysis. METHODS: Sixty mandibular incisors were randomly divided into 6 experimental groups (n = 10) according to the systems and working lengths used for the root canal preparation: ProTaper Universal for Hand Use (Dentsply Maillefer, Ballaigues, Switzerland), HyFlex CM (Coltene-Whaledent, Allstetten, Switzerland), and Reciproc (VDW, Munich, Germany) files working at the apical foramen (AF) and 1 mm short of the AF (AF - 1 mm)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28413595/effect-of-retreatment-on-the-push-out-bond-strength-of-mta-based-and-epoxy-resin-based-endodontic-sealers
#4
Hamidreza Yavari, Shahriar Shahi, Saeedeh Galledar, Mohammad Samiei, Maryam Janani
Background. Further studies on the adhesion properties of MTA-based materials seem necessary due to their growing use in endodontic treatment. This research aimed to assess the effect of retreatment on the bond strength of MTA-based (MTA Fillapex) and epoxy resin-based (AH Plus) sealers. Methods. ProTaper rotary files were applied to prepare the root canals of 80 human mandibular premolars. Then, the roots were randomly divided intotwo groups of A (n=40) and B (n=40), which were obturated with gutta-percha and MTA Filla-pex and AH Plus sealer, respectively...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28387992/influence-of-post-space-preparation-on-the-apical-leakage-of-calamus-single-cone-and-cold-lateral-condensation-obturation-techniques-a-computerized-fluid-filtration-study
#5
Zeynep Özkurt-Kayahan, Güher Barut, Zuhal Ulusoy, Hasan Oruçoğlu, Mehmet Baybora Kayahan, Ender Kazazoğlu, Faruk Haznedaroğlu
PURPOSE: Apical microleakage between the root canal and periapical tissues is considered a common cause of endodontic failure. The aim of this study was to evaluate the apical microleakage of various obturation techniques after immediate post space preparations with different drills. MATERIALS AND METHODS: One hundred twenty human single-rooted teeth were selected for this study. The coronal portions were removed to achieve a uniform length of 15 mm. All root canals were instrumented with ProTaper Next rotary files using crown-down technique...
April 7, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28383607/efectiveness-of-the-waveone-and-protaper-d-systems-for-removing-gutta-percha-with-or-without-a-solvent
#6
Ana Pm Colombo, Carlos E Fontana, Aline Godoy, Alexandre S De Martin, Augusto S Kato, Daniel Gp Rocha, Rina A Pelegrine, Carlos Es Bueno
Endodontic retreatment requires complete removal of the filling material and access to the apical foramen. The purpose of this study was to evaluate the effectiveness of the Wave One reciprocating system and compare it to the ProTaper D rotarysystem, with or without the use of a solvent, in removing filling material from root canals. The time required for each filling removal technique employed was also determined and compared. Forty extracted human mandibular premolars with a single, straight, flattened canal were prepared and filled...
December 2016: Acta Odontológica Latinoamericana: AOL
https://www.readbyqxmd.com/read/28357000/root-canal-transportation-and-centering-ability-of-nickel-titanium-rotary-instruments-in-mandibular-premolars-assessed-using-cone-beam-computed-tomography
#7
Iussif Mamede-Neto, Alvaro Henrique Borges, Orlando Aguirre Guedes, Durvalino de Oliveira, Fábio Luis Miranda Pedro, Carlos Estrela
INTRODUCTION: The aim of this study was to evaluate, using cone-beam computed tomography (CBCT), transportation and centralization of different nickel-titanium (NiTi) rotary instruments. METHODS: One hundred and twenty eight mandibular premolars were selected and instrumented using the following brands of NiTi files: WaveOne, WaveOne Gold, Reciproc, ProTaper Next, ProTaper Gold, Mtwo, BioRaCe and RaCe. CBCT imaging was performed before and after root canal preparation to obtain measurements of mesial and distal dentin walls and calculations of root canal transportation and centralization...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/28349903/presence-of-metallic-microfragments-on-dentinal-walls-and-instrument-defects-following-root-canal-preparation
#8
Caroline Solda, Marina C Langaro, Alessandra N Machado, José R Vanni, Daniel de A Decurcio, Julio A Silva, Carlos Estrela, Fernando B Barletta
AIM: To determine the presence of metallic microfragments and their elemental composition in the dentinal walls of root canals following preparation using different endodontic instruments and to assess the active cutting edges of instruments with regard to structural defects. MATERIALS AND METHODS: A total of 108 molar teeth were selected and prepared using different endodontic instruments. Teeth were randomly divided into nine groups of 12 teeth each, according to the instruments employed: Manual systems -K-FlexoFile, K-File, and Hedstroem; rotary systems - ProTaper Next, Mtwo, BioRaCe; and reciprocating systems - Reciproc, Unicone, and WaveOne...
April 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28333370/influence-of-nickel-titanium-rotary-systems-with-varying-tapers-on-the-biomechanical-behaviour-of-maxillary-first-premolars-under-occlusal-forces-a-finite-element-analysis-study
#9
S Askerbeyli Ors, A Serper
AIM: To evaluate the effect of three nickel-titanium (Ni-Ti) rotary systems with varying tapers on stress distribution and to analyse potential fracture patterns as well as the volume of fracture-susceptible regions in two-rooted maxillary premolars. METHODOLOGY: The root canals of three single-rooted premolars were prepared with either HeroShaper (Micro-Mega, Besançon, France) to (size 30, .04 taper), Revo-S (Micro-Mega) to AS30 (size 30, .06 taper) or ProTaper Universal (Dentsply Maillefer, Ballaigeus, Switzerland) to F3 (size 30, ...
March 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28329438/influence-of-clinical-use-on-physical-structural-surface-properties-and-electrochemical-potential-of-niti-endodontic-instruments
#10
E S J Pereira, C C F Amaral, J A P Gomes, O A Peters, V T L Buono, M G A Bahia
AIM: To investigate the surface morphology and electrochemical potential of superelastic (SE), M-Wire (MW), and shape memory technology (SMT) NiTi instruments before and after single clinical use in vivo. METHODOLOGY: A total of 60 ProTaper Universal F2 (PTU - SE), ProTaper Next X2 (PTN - MW), Typhoon (TYP), Hyflex (HF) and Vortex Blue (VB), the last three SMT, and size 25, .06 taper (n = 6 of each type) files were examined. Scanning electron microscopy (SEM), X-ray energy-dispersive spectroscopy (EDS) and electrochemical potential analysis were employed before and after clinical use...
March 22, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28329416/influence-of-continuous-rotation-or-reciprocation-of-optimum-torque-reverse-motion-on-cyclic-fatigue-resistance-of-nickel-titanium-rotary-instruments
#11
E Pedullà, G Corsentino, E Ambu, F Rovai, F Campedelli, S Rapisarda, G R La Rosa, E Rapisarda, S Grandini
AIM: To evaluate the resistance to cyclic fatigue of ProTaper Next (PTN; Dentsply Sirona, Ballaigues, Switzerland), Revo-S (Micro-Mega, Besançon, France), Mtwo (Sweden & Martina, Padova, Italy), Twisted Files (TF, SybronEndo, Orange, CA, USA) and EndoWave (J Morita Corporation, Osaka, Japan) used in continuous rotation or in reciprocation of Optimum Torque Reverse motion (OTR). METHODOLOGY: A total of 120 nickel-titanium files were tested. Twenty-four instruments for each brand were divided into 2 groups (n = 12) on the basis of the motion tested: continuous rotation (Group 1) or reciprocation of OTR motion (Group 2)...
March 22, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28302945/the-incidence-of-dentinal-cracks-during-root-canal-preparations-with-reciprocating-single-file-and-rotary-file-systems-a-meta-analysis
#12
Xi Wei, Bo Hu, Haiyang Peng, Ming Tang, Jinlin Song
As a dangerous factor in vertical root fracture, dentinal crack formation is often associated with root canal instruments. We conducted this meta-analysis to compare the influence of two types of nickel titanium (NiTi) instruments that have different movements (reciprocating single-file versus full-sequence rotary file systems) on dentinal cracks formation during root canal preparation. Searches were conducted in PubMed, ISI Web of Knowledge, Embase and Cochrane Library using a combination of keywords. Titles and abstracts of all articles were independently assessed by two reviewers in accordance with the predefined inclusion criteria...
March 8, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28298975/evaluation-of-antimicrobial-and-antifungal-efficacy-of-chitosan-as-endodontic-irrigant-against-enterococcus-faecalis-and-candida-albicans-biofilm-formed-on-tooth-substrate
#13
Pankaj Yadav, Sarika Chaudhary, Rajendra K Saxena, Sangeeta Talwar, Sudha Yadav
BACKGROUND: Bacterial biofilms formed on the root canal wall are often difficult to remove. This study aimed to evaluate the cytotoxic effect and antibacterial efficacy of chitosan when used as root canal irrigant against E. Faecalis and Candida albicans biofilm formed on tooth substrate. MATERIAL AND METHODS: The present study evaluated antibacterial effect of 0.25% Chitosan, 0.5% Chitosan, 2% chlorhexidine and 3% sodium hypochlorite against Enterococcus faecalis and Candida Albicans...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28258810/apically-extruded-debris-after-retreatment-procedure-with-reciproc-protaper-next-and-twisted-file-adaptive-instruments
#14
Koray Yılmaz, Taha Özyürek
INTRODUCTION: The aim of this study was to compare the amount of debris extruded from the apex during retreatment procedures with ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland), Reciproc (RCP; VDW, Munich, Germany), and Twisted File Adaptive (TFA; SybronEndo, Orange, CA) files and the duration of these retreatment procedures. METHODS: Ninety upper central incisor teeth were prepared and filled with gutta-percha and AH Plus sealer (Dentsply DeTrey, Konstanz, Germany) using the vertical compaction technique...
April 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28243300/comparison-of-apical-extrusion-of-debris-by-using-single-file-full-sequence-rotary-and-reciprocating-systems
#15
Maryam Ehsani, Robab Farhang, Azadeh Harandi, Saeid Tavanafar, Maryam Raoof, Saeedeh Galledar
OBJECTIVES: During root canal preparation, apical extrusion of debris can cause inflammation, flare-ups, and delayed healing. Therefore, instrumentation techniques that cause the least extrusion of debris are desirable. This study aimed to compare apical extrusion of debris by five single-file, full-sequence rotary and reciprocating systems. MATERIALS AND METHODS: One hundred twenty human mandibular premolars with similar root lengths, apical diameters, and canal curvatures were selected and randomly assigned to six groups (n=20): Reciproc R25 (25, 0...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28218957/cyclic-fatigue-resistance-of-a-novel-rotary-file-manufactured-using-controlled-memory-ni-ti-technology-compared-to-a-file-made-from-m-wire-file
#16
E Alshwaimi
AIM: To compare the cyclic fatigue properties of a novel file made using controlled memory NiTi technology with those of files made from M-wire. METHODOLOGY: Twelve files with similar cross-sectional geometry and tip size from each of the following groups were tested: Proflexendo made from CMT (PE; size 30 .04) (Nexden, Houston, Tx, USA), ProFile Vortex made from M-wire (PV; size 30 .04) (Dentsply Tulsa Dental, Tulsa, OK, USA), and ProTaper Universal made from regular alloy (PU; F3) (Dentsply Tulsa Dental)...
February 20, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28215346/a-micro-computed-tomography-evaluation-of-the-shaping-ability-of-two-nickel-titanium-instruments-hyflex-edm-and-protaper-next
#17
Pier Matteo Venino, Claudio Luigi Citterio, Alberto Pellegatta, Marta Ciccarelli, Marcello Maddalone
INTRODUCTION: The aim of this study was to evaluate and compare, by means of micro-computed tomography imaging, the shaping ability of ProTaper Next (PTN) and the novel HyFlex EDM (HFEDM) instruments. METHODS: Forty teeth were randomly divided into 2 groups and prepared with PTN or HFEDM. Root canal transportation and centering ratio were evaluated in mesiodistal and buccolingual directions at 5 levels (at the midpoint of the apical, middle, and coronal thirds and at the boundaries between them)...
April 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28210445/evaluation-of-conventional-protaper-hand-and-protaper-rotary-instrumentation-system-for-apical-extrusion-of-debris-irrigants-and-bacteria-an-in-vitro-randomized-trial
#18
Pinky Kalra, Arathi Rao, Ethel Suman, Ramya Shenoy, Baranya-Shrikrishna Suprabha
BACKGROUND: Endodontic instrumentation carries the risk of over extrusion of debris and bacteria. The technique used and the type of instrumentation influences this risk. AIM: The purpose of this study was to evaluate and compare the K-file, ProTaper hand and ProTaper rotary instrumentation systems for the amount of apically extruded debris, irrigant solution and intracanal bacteria. DESIGN: Experimental single blinded randomized type of in vitro study with sample of 30 single rooted teeth...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28203015/-effect-of-thermal-conductivity-on-apical-sealing-ability-of-4-dental-gutta-percha-cones
#19
C Fan, C Y Yuan, J C Zhang, X Y Wang
OBJECTIVE: To investigate the effect of thermal conductivity on the apical sealing ability of different dental gutta-percha cones during the warm vertical condensation obturation. METHODS: Four kinds of dental gutta-percha cones were used in this study: Bio-GP points (BP, B&L, Korea), large-tapered gutta-percha (DP, DENTSPLY, America), PROTAPER Universal gutta-percha points (DPP, DENTSPLY, America) and mtwo gutta-percha points (VP, VDW, Germany). Volume differences method was used to determine the main components and the thermal conductivity determinator was used to measure the thermal conductivity of these dental gutta-percha cones...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28198973/influence-of-niti-alloy-on-the-root-canal-shaping-capabilities-of-the-protaper-universal-and-protaper-gold-rotary-instrument-systems
#20
Jussaro Alves Duque, Rodrigo Ricci Vivan, Bruno Cavalini Cavenago, Pablo Andrés Amoroso-Silva, Ricardo Affonso Bernardes, Bruno Carvalho de Vasconcelos, Marco Antonio Hungaro Duarte
Objective: This study aimed to evaluate the influence of the NiTi wire in Conventional NiTi (ProTaper Universal PTU) and Controlled Memory NiTi (ProTaper Gold PTG) instrument systems on the quality of root canal preparation. Material and Methods: Twelve mandibular molars with separate mesial canals were scanned using a high-definition microcomputed tomography system. The PTU and PTG instruments were used to shape twelve mesial canals each. The canals were scanned after preparation with F2 and F3 instruments of the PTU and PTG systems...
January 2017: Journal of Applied Oral Science: Revista FOB
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