نتایج جستجو برای: mtwo r

تعداد نتایج: 446993  

Journal: :Journal of endodontics 2016
Edgar Schäfer Caroline Schrenker Jonas Zupanc Sebastian Bürklein

INTRODUCTION The aim of this study was to compare different obturation techniques in terms of the percentage of gutta-percha filled areas (PGFA), sealer filled areas (PSFA), and voids in straight root canals prepared with different instruments. METHODS One hundred sixty extracted single-rooted mandibular premolars with straight canals were allocated into 10 groups (n = 16 teeth per group): A,...

2010
Jung-Hong Ha Myoung-Uk Jin Young-Kyung Kim Sung-Kyo Kim

Screw-in effect is one of the unintended phenomena that occurs during the root canal preparation with nickel-titanium rotary files. The aim of this study was to compare the screw-in effect among various nickel-titanium rotary file systems. Six different nickel-titanium rotary instruments (ISO 20/.06 taper) were used: K3 (SybronEndo, Glendora, CA, USA), Mtwo (VDW GmbH, München, Germany), NRT wit...

Journal: :iranian endodontic journal 0
sahar jalali behrooz eftekhar payam paymanpour mohammad yazdizadeh mansour jafarzadeh

introduction: the aim of this study was to compare the formation of dentinal crack and craze lines in the root dentin during root canal preparation with three different niti endodontic systems, naming reciproc (rcp), protaper universal (ptu) and mtwo. methods and materials: one hundred extracted mandibular premolars with single canals were selected and decoronated. the teeth were randomly divid...

Journal: :International endodontic journal 2010
G Plotino N M Grande M C Melo M G Bahia L Testarelli G Gambarini

AIM To evaluate the cyclic fatigue resistance of five NiTi rotary systems in an abrupt apical curvature. METHODOLOGY Cyclic fatigue testing was performed in stainless-steel artificial canals with a 2-mm radius of curvature and an angle of curvature of 90 degrees constructed to the dimensions of the instruments tested. The middle of the simulated curvature was 2.5 mm from the tip of the instru...

Journal: :iranian endodontic journal 0
safi laaya department of endodontics, dental school, shiraz university of medical science, shiraz, iran leila khojastehpour department of oral radiology, dental school, shiraz university of medical sciences, shiraz, iran abdol hosein layeghnejad general practitioner, shiraz, iran

introduction: the preparation of the root canal space includes debridement, shaping and apical preparation. these procedures are challenging and constitute. the recent introduction of automated techniques for canal preparation has created considerable interest. the aim of this study was to test shaping ability of one hand instrumentation (passive step-back technique) and new rotary niti system ...

Journal: :iranian endodontic journal 0
hossein labaf dental school, shahed university roza haghgoo dental school, shahed university kumars nazarimoghaddam dental school, shahed university mahshid mahammadi basir

introduction: file fracture is one of the main procedural mishaps in endodontic treatment. the aim of this in vitro study was to compare the fracture rate of three niti rotary systems; hero 642, mtwo and flexmaster in artificial canals. methods and materials: in this study, bovine long bone was used. after primary preparation of bones, longitudinal sections with 4-cm diameter were cut and encod...

Journal: :Journal of endodontics 2016
Clarissa Teles Rodrigues Marco Antonio Hungaro Duarte Marcela Milanezi de Almeida Flaviana Bombarda de Andrade Norberti Bernardineli

INTRODUCTION The aim of this ex vivo study was to evaluate the removal of filling material after using CM-wire, M-wire, and nickel-titanium instruments in both reciprocating and rotary motions in curved canals. METHODS Thirty maxillary lateral incisors were divided into 9 groups according to retreatment procedures: Reciproc R25 followed by Mtwo 40/.04 and ProDesign Logic 50/.01 files; ProDesi...

2014
Benjamin Briseño Georg Thieme

[1] Ahmad M. Comparison between two ultrasonic units in shaping curved canals in teeth using macroradiography. cleaning effectiveness of two single-file systems in severely curved root canals of extracted teeth: Reciproc WaveOne versus Mtwo ProTaper. Fidel RAS. The ability of the Reciproc R25 instrument to reach the full root canal working length without a glide path.

Journal: :iranian endodontic journal 0
hengameh akhavan yaser khalil azdadi shahram azimi bahare dadresanfar anahid ahmadi

introduction: retreatment is performed in teeth with unsuccessful root canal therapy or persistent apical lesion. the most important factor for achieving successful retreatment is thorough cleaning and reshaping. niti files and rotary instruments are widely used for the removal of obturatants. this study compared the ability of mtwo and d-race retreatment systems to remove residual gutta-percha...

Journal: :iranian endodontic journal 0
hadi mokhtari mahdi niknami aydin sohrabi ehsan habibivand hamid reza mokhtari zonouzi saeed rahimi

introduction: the aim of this in vitro study was to evaluate the transportation of mesiobuccal canals of mandibular first molars prepared with either biorace or mtwo rotary instruments or hand k-flexofile, by means of cone-beam computed tomography (cbct). methods and materials: forty-five mandibular molars were selected and randomly divided into three groups ( n =15). mesiobuccal roots of these...

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