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Dissertations / Theses on the topic 'Nickel-titanium instruments'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Ho, Wing-lam. "Flexural rigidity of nickel-titanium instruments." Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B31954297.

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2

Sattapan, Boonrat. "Dynamic properties of nickel-titanium instruments." Connect to thesis, 1997. http://repository.unimelb.edu.au/10187/2437.

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Root canal preparation in narrow, curved canals is a challenge even for experienced endodontists. Recently nickel-titanium (NiTi) hand files have played an important role in root canal preparation, particularly in curved root canals. Nickel-titanium endodontic instruments were first investigated in 1988 by Walia et al. who found that NiTi files have two to three times more elastic flexibility in bending and torsion, as well as superior resistance to torsional fracture compared with similar stainless steel files.

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3

Ho, Wing-lam, and 何潁琳. "Flexural rigidity of nickel-titanium instruments." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31954297.

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4

Cheung, Shun-pan Gary. "Low-cycle fatigue of nickel-titanium rotary root-canal instruments /." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36666671.

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5

Cheung, Shun-pan Gary, and 張順彬. "Low-cycle fatigue of nickel-titanium rotary root-canal instruments." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B45015533.

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6

Alapati, Satish B. "An investigation of phase transformation mechanisms for nickel-titanium rotary endodontic instruments." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1140186903.

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7

Campbell, Les. "Effect of fatigue on torsional failure of nickel-titanium controlled memory instruments." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44903.

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Abstract Introduction: This study was undertaken to understand how fatigue affects the torsional properties of both traditional nickel-titanium (NiTi) and nickel-titanium controlled memory (CM) files. Methods: Typhoon (TYP) 25.04 and 40.04 rotary files, in both NiTi and CM, were tested using a three-point bending apparatus to obtain the mean number of cycles to failure (mNCF). New files were precycled to four conditions (i.e., 0%, 25%, 50%, and 75% of the mNCF) before torsional resistance tests were performed. Each file was exposed to torsional stress until failure, and at that point the to

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8

Yang, Eugenia You Yea. "Comparison of two methodologies for testing cyclic fatigue resistance of nickel-titanium rotary files." Thesis, Boston University, 2015. https://hdl.handle.net/2144/37825.

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Thesis (MSD) --Boston University, Henry M. Goldman School of Dental Medicine, 2015 (Department of Endodontics).<br>Includes bibliography: leaves 69-74.<br>Nickel titanium (NiTi) rotary files have become an important adjunct to endodontic treatment of the root canal system. However, despite the many advantages, Ni-Ti rotary files have a risk of unexpected fracture without any visible signs of previous permanent deformation. A wide range of methodologies have been developed over the years to test cyclic fatigue; yet to date, there is no specification or international standard for cyclic fatigue

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9

Alcalde, Murilo Priori. "Comparison of the mechanical properties of engine-driven nickel- titanium instruments manufactured by different thermal treatments." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/25/25147/tde-24012019-101418/.

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The aim of this study was to evaluate the mechanical properties of engine-driven Nickel-Titanium instruments manufactured by different thermal treatments. In the first part of this study, 60 reciprocating instruments were used (n=20): Reciproc R25 (REC 25.08), Unicone L25 (UNC 25.06) e Prodesign R 25 (PDR 25.06). The cyclic flexural fatigue resistance was performed measuring the time to failure in an artificial stainless steel canal with a 60º angle and a 5 mm radius of curvature (n=10). The torsional test was performed according to ISO 3630-1, measuring the torque and angle of rotation at fai

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10

Tomsic, Albert L. "The effect of multiple usages of nickel-titanium rotary endodontic files on cutting efficiency." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10032.

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Thesis (M.S.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains viii, 44 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 40-43).

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11

Kitchens, George Gray Jr. "The Effect of Operational Speed on the Fracture of Nickel Titanium Rotary Instruments." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd_retro/66.

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Numerous nickel titanium rotary file systems have been introduced in recent years. The recommended speed at which these files are to be operated varies widely between manufacturers. The purpose of this study was to test the number of rotations to fracture of NiTi rotary files when operated at different speeds and at different angles. Sixty size 25 Profile® nickel titanium rotary files were tested, thirty 0.04 and thirty 0.06 taper. Files were operated at speeds of 350 or 600 rpm and at angles of 25°, 28°, and 33.5°. The time to fracture was recorded and the numbers of rotations to fracture

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12

Prado, Marco Aurélio Rodrigues do. "Influência da conicidade no comportamento mecânico de instrumentos de níquel-titânio." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=611.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Este trabalho tem como objetivo avaliar a influência da conicidade de instrumentos de níquel-titânio acionados a motor, na flexibilidade; na resistência a fratura por torção à direita e na resistência a fratura por flexão rotativa, analisando ainda por meio de microscopia eletrônica de varredura a superfície de fratura dos instrumentos ocorridas por torção e por flexão rotativa, bem como a configuração das hélices das hastes de corte helicoidais dos instrumentos junto ao ponto de fratura. Foram utilizados sessenta instrumentos fabr

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13

Jonker, Casper Hendrik. "The influence of glide path preparation on the failure rate of nickel-titanium reciprocating instruments." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/40703.

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Introduction: The aim of this in vitro study was to determine the influence of two glide path preparation methods on the fracture rate of the Primary 25/08 WaveOne reciprocating instrument. The number of simulator Endo-Training-Blocks in each group were calculated at the time of instrument fracture and compared to determine the influence of glide path preparation on the failure rate of the Primary 25/08 WaveOne reciprocating instrument. Preparation times for different glide path methods and total time for root canal preparation, with or without glide path, was also calculated. Materials and Me

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14

Smith, Michael Shane. "SODIUM HYPOCHLORITE'S EFFECT ON NICKEL-TITANIUM ROTARY INSTRUMENTS AND ITS EFFECT ON RESISTANCE TO FRACTURE." VCU Scholars Compass, 2007. http://scholarscompass.vcu.edu/etd/941.

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The purpose of this study was to examine the effect of partial and total immersion in sodium hypochlorite on nickel-titanium rotary files and to determine whether resistance to fracture was influenced by the immersion time. One hundred K3 and 100 ProFile® rotary files were either partially or totally immersed in 5.25% sodium hypochlorite for zero, one, five, thirty, or sixty minutes. After immersion, files were subjected to cyclic fatigue testing. Time to fracture was recorded and analyzed by a two-way ANOVA. Tukey's honest significant difference was used to identify any differences in im

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15

Arantes, Werington Borges. "Avaliação das características superficiais de instrumentos rotatórios de NiTi antes e após o uso." Universidade de Taubaté, 2010. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=423.

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Objetivos: Avaliaram-se, por meio de MEV, instrumentos endodônticos do sistema rotatório Ni-Ti, antes e após o uso, considerando limpeza defeitos e deformações. Método: Vinte instrumentos, das marcas Twisted File, BioRaCe, Mtwo e EndoWave foram fotografados com aumento de 190 vezes quanto à presença de sujidade. As limas foram lavadas e novamente fotografadas para visualizar defeitos tendo como critérios a presença ou não de borda irregular, ranhura, microcavidade e rebarba. Realizou-se preparo dos canais radiculares simulados, nova limpeza e análise microscópica dos instrumentos após cinco us

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16

Wei, Xi. "Comparison of three nickel-titanium instruments and the step-down technique for preparing curved root canals." Click to view the E-thesis via HKUTO, 2000. http://sunzi.lib.hku.hk/HKUTO/record/B38628077.

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17

韋曦 and Xi Wei. "Comparison of three nickel-titanium instruments and the step-down technique for preparing curved root canals." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B38628077.

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18

Aljazaeri, Bassim. "Effect of previous angular deformation on flexural fatigue resistance of controlled memory nickel-titanium endodontic instruments." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/48451.

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Objective: To evaluate the effect of torsional stress preloading angle on fatigue resistance of Typhoon (TYP) CM instruments. Methodology: TYP NiTi 25/.04, TYP NiTi 40/.04, TYP CM 25/.04 and TYP CM 40/.04 were rotated until fracture to obtain the mean angular deflection according to the +-ISO 3630-1 standard. Files were pre-torqued to 25, 50, and 75% of their elastic limit and then subjected to cyclic loading in a three-point binding device until fracture. The fatigue life was recorded for each file.The fracture surface of each fragment was examined with a scanning electron microscope. Results

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19

Bang-Schaefer, Katrina H. "The Effect of Sodium Hypochlorite on Nickel Titanium Rotary Instruments and its Effect on Resistance to Fracture." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd_retro/75.

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The purpose of this study was to examine the effect of immersion in sodium hypochlorite on nickel titanium rotary files and determine whether resistance to fracture was influenced by the immersion time. 70 ISO size 25 0.04 taper nickel titanium K3 and Profile rotary instruments were immersed in 5.25% sodium hypochlorite for 1, 5, 15, 30, 60, and 120 minutes (n=5 each). Resistance to fracture was tested by rotating files at a 30 degree angle at 350 rpm in a universal testing machine. Time to fracture was recorded and analyzed by a two-way ANOVA. Within both file types, there was a decreased

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20

Franco, Emanuela de Carvalho. "Avaliação da influência do hipoclorito de sódio na qualidade da superfície e resistência à corrosão de limas de NiTi de diferentes procedências." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-18022014-164937/.

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O presente estudo avaliou a influência do hipoclorito de sódio a 1% e 2,5% na qualidade do acabamento superficial e na resistência à corrosão de duas limas endodônticas: Race® e Hyflex® através de ensaio eletroquímico de polarização potenciodinâmica cíclica (EPPC) e imagens obtidas por microscopia eletrônica de varredura (MEV). Para o EPPC foram utilizados vinte limas de cada marca comercial (#25, conicidade 0.04 e 25 mm de comprimento). Dez dos vinte instrumentos foram individualmente fixados pelo cabo a uma ponta de fio de cobre 0,12 mm de 20 cm de comprimento e posicionado no interior de um

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21

Duke, Frédéric. "Low-cycle cyclic fatigue properties of novel nickel-titanium rotary endodontic instruments in the single- and double-curvatures." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54277.

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Introduction: This in vitro study aimed to evaluate and compare the fatigue resistance of ProFile Vortex® (VX) and Vortex Blue® (VB) files in two different artificial double curvature canals (DC1 and DC2) and in an artificial single curvature canal (SC). The bending moment of VX and VB was assessed. Methods: The bending moment (g·cm) was used to measure flexibility of VX and VB (size 25/.04, length: 25mm) according to ISO 3630-1 specifications. Both files types were tested for cyclic fatigue failure inside canals containing: a single curvature (SC: 60⁰ curvature, 5 mm radius) and two canal

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22

Chiu, Mei-ling Bonnie, and 趙美玲. "Preparation of curved root canals with different nickel-titanium rotary systems: three-dimensional comparisonusing micro-computed tomography." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31954273.

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23

Chiu, Mei-ling Bonnie. "Preparation of curved root canals with different nickel-titanium rotary systems three-dimensional comparison using micro-computed tomography /." Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B31954273.

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24

Reynolds, Jake. "COMPARATIVE ANALYSIS OF TORSIONAL STRENGTH BETWEEN PROFILE® GT® AND GT® SERIES X(TM) NICKEL TITANIUM ROTARY INSTRUMENTS." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1683.

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The purpose of this study was to compare the resistance to fracture by the twisting of two nickel titanium (NiTi) rotary file systems. The Profile® GT® (GT) and the GT® Series X(TM) (GTX) files were tested to analyze the maximum torsional strength and the maximum angular deflection at the time of separation of the files. For each system, ten new files were tested at each of the following eight taper/size designations for a total of 160 files: 20/0.04, 20/0.06, 30/0.04, 30/0.06, 30/0.08, 40/0.04, 40/0.06, and 40/0.08. The American National Standards Institute / American Dental Association Speci

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25

Brito, Ana Paula Pedroso. "Caracterização das dimensões da aresta lateral de corte e do núcleo dos instrumentos Mtwo®, ProTaper®, Wizard Navigator® e BioRace®." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/8561.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2018-06-11T11:47:52Z No. of bitstreams: 2 Dissertação - Ana Paula Pedroso Brito - 2015.pdf: 1014799 bytes, checksum: e2dcf8a46ffc5134b0215684a6190af3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-06-11T11:50:48Z (GMT) No. of bitstreams: 2 Dissertação - Ana Paula Pedroso Brito - 2015.pdf: 1014799 bytes, checksum: e2dcf8a46ffc5134b0215684a6190af3 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made

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Salum, Graziela. "Avaliação da capacidade de corte e resistência à fadiga cíclica dos instrumentos Profile Vortex e ProTaper." Universidade de Taubaté, 2012. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=604.

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Objetivo: Analisar in vitro a capacidade de corte e a resistência à fadiga cíclica dos sistemas rotatórios ProFile Vortex (Dentsply Tulsa Dental, USA) e ProTaper (Dentsply Maillefer, Suíça). Metodologia: Para a análise da capacidade de corte, pesou-se em balança analítica digital cem blocos de resina fenólica que continham canais simulados com 75 de curvatura, obtendo-se os pesos iniciais (P0) e após a instrumentação dos canais, estes blocos foram novamente pesados obtendo-se os pesos finais (P1). Dividiram-se quarenta instrumentos em dois grupos. Grupo A: vinte instrumentos ProFile Vortex n25

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27

Diemer, Franck. "Utilisation en rotation continue des instruments de préparation canalaire en nickel-titane : évaluation des contraintes." Toulouse 3, 2006. http://www.theses.fr/2006TOU30283.

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The first part of this work exposes a bibliographical synthesis about properties of memory-shape alloys and the characteristics of the small electric motors. The second part is experimental. We compared the resistance of instruments characterized by different profiles. We measured the differences induced by profile and pitch length on stresses generated by endodontic instrument used in continuous rotation. Then we try to evaluate the conditions of disengaging of different electric motors and contra-angles. We finally use, with a torque control motor, a file with the tip maintained in a screw-l

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28

Kawakami, Dirce Akemi Sacaguti. "\"Resistência à fadiga cíclica flexural de instrumentos rotatórios de Ni-Ti em razão do uso e do torque\"." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-11052007-120620/.

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O objetivo do presente estudo foi avaliar a resistência à fadiga cíclica flexural de instrumentos rotatórios de níquel-titânio de número 25, conicidade 0,04 e 25 mm de comprimento (K3, SybronEndo), submetidos a variados torques de acionamento e repetidos ciclos de usos em canais simulados, valendo-se de dispositivo apropriado para ensaios dinâmicos. Procurou-se determinar se, além do fator de variação número de uso, há influência relacionada com o torque e, ainda, a possibilidade de interação entre número de uso e torque. Valendo-se motor elétrico acionado à velocidade de 300 rpm foram instrum

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29

Cervi, Devanir de Araújo [UNESP]. "Avaliação da infiltração apical, pós tratamento de canais radiculares, utilizando 4 diferentes técnicas combinadas de instrumentação rotatória e obturação por termoplastificação. Estudo in vitro." Universidade Estadual Paulista (UNESP), 2002. http://hdl.handle.net/11449/90422.

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Made available in DSpace on 2014-06-11T19:24:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-02-28Bitstream added on 2014-06-13T19:52:10Z : No. of bitstreams: 1 cervi_da_me_arafo.pdf: 2178427 bytes, checksum: c6ea8e8823b6b51fa82888cf17798887 (MD5)<br>Foram utilizados 115 dentes pré molares inferiores de humanos, que foram divididos em 5 grupos de 16 dentes cada; sendo 5 grupos com 5 dentes cada, utilizados como controle positivo e, 5 grupos de 2 dentes como controle negativo. Em todos os dentes após a abertura coronária, foi realizado o desbridamento foraminal com uma lima tipo Ker

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30

Sá, Júnio Pereira de. "Morfometria comparativa in vitro do desgaste dentinário do terço cervical de raízes mésio-vestibulares de primeiros molares superiores produzido por instrumentos rotatórios de aço e de níquel-titânio." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/23/23135/tde-04012012-111924/.

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No preparo dos canais radiculares, eminentemente os curvos, a abordagem cérvico-apical amplamente difundida promovendo a dilatação da região cervical do canal radicular previamente à atuação de instrumentos em sua região apical constitui técnica e inegavelmente uma forma adequada, tanto do ponto de vista mecânico como microbiológico, de interagir com o espaço endodôntico em busca de uma experiência bem sucedida e previsível. De outra forma, os mais recentes instrumentos endodônticos, muito mais flexíveis em decorrência das novas ligas de baixo módulo de elasticidade empregadas em sua fabricaçã

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31

Costa, Giovana Borba Gazzinelli. "Avaliação da eficiência de sistemas rotatórios para desobturação em canais curvos, por meio de tomografia computadorizada por feixe cônico." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-18022014-193143/.

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O presente estudo teve por objetivo avaliar ex vivo a eficiência de sistemas para retratamento (ProTaper Universal Retratamento, Mtwo Retratamento e D-Race), na desobturação de canais mésio vestibulares curvos de molares superiores, por meio de tomografia computadorizada por feixe cônico. Foram utilizados canais mésio vestibulares com curvatura entre 20° e 40°, de 36 molares superiores, preparados com Protaper Universal (até instrumento F2), obturados com cone ProTaper F2 e cimento AH Plus, pela técnica de condensação lateral. Para a desobturação, os dentes foram divididos em grupos (I: ProTap

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Gonçalves, Diogo Nuno Ferreira Gomes Ribeiro. "Comparação entre três sistemas diferentes de instrumentação mecanizada: ProTaper, WaveOne e Reciproc." Master's thesis, [s.n.], 2013. http://hdl.handle.net/10284/4144.

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Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária<br>Introdução: Comparação dos diferentes aspetos inerentes à instrumentação mecanizadade três sistemas endodônticos. Objetivos: Avaliar e comparar a resistência à fadiga cíclica e fratura dos instrumentos usados nos sistemas ProTaper, WaveOne e Reciproc, bem como perfurações iatrogénicas, extrusão de detritos a nível apical, desvios e falsos trajetos, capacidade de remoção de detritos dos canais e tempo de trabalho. Metodologia: Realiz

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Freire, Laila Gonzales. "Avaliação do preparo de canais radiculares com instrumentos rotatórios torcidos e usinados, por meio de cortes transversais e da microtomografia computadorizada." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-18082010-123433/.

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O preparo químico-cirúrgico é uma das etapas mais importantes do tratamento endodôntico, pois promove a desinfecção do sistema de canais radiculares através da limpeza e da modelagem. Realizar o preparo de canais curvos é um grande desafio, devido à ocorrência freqüente de acidentes operatórios como o transporte do canal. A introdução de instrumentos fabricados em ligas de níquel-titânio (NiTi) contribuiu consideravelmente para a melhora na qualidade da instrumentação dos canais. Os diferentes sistemas rotatórios que são apresentados continuamente ao profissional devem ser estudados com detalh

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Alves, Marília Fagury Videira Marceliano. "Avaliação microtomográfica de canais mesiais de molares inferiores preparados com sistemas rotatórios e reciprocantes." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7227.

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O objetivo do presente trabalho foi avaliar, em microtomografia computadorizada (CT), o preparo de canais de molares inferiores com diferentes sistemas acionados a motor. Foram selecionadas 58 raízes mesiais patentes, de diâmetro anatômico correspondente a #10. Para a avaliação em TC, um anel de aço inoxidável foi confeccionado nos moldes do suporte para amostra do microtomógrafo, para que servisse de fôrma para a inclusão das raízes em resina Duralay, a fim de padronizar a posição do espécime no escaneamento inicial e final. Os canais foram preparados com os sistemas Reciproc R25 (n=16); Wave

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35

Cervi, Devanir de Araújo. "Avaliação da infiltração apical, pós tratamento de canais radiculares, utilizando 4 diferentes técnicas combinadas de instrumentação rotatória e obturação por termoplastificação. Estudo "in vitro" /." Araraquara : [s.n.], 2002. http://hdl.handle.net/11449/90422.

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Orientador: Léa Assed Bezerra da Silva<br>Banca: Mario Roberto Leonardo<br>Banca: Jesus Djalma Pécora<br>Resumo: Foram utilizados 115 dentes pré molares inferiores de humanos, que foram divididos em 5 grupos de 16 dentes cada; sendo 5 grupos com 5 dentes cada, utilizados como controle positivo e, 5 grupos de 2 dentes como controle negativo. Em todos os dentes após a abertura coronária, foi realizado o desbridamento foraminal com uma lima tipo Kerr no 15 até 1mm além do forame apical e o preparo biomecânico a 1mm aquém comprimento real do dente. Foram utilizados para a instrumentação dos canais

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36

Almeida, Fabiano Costa 1969. "Analise de falhas de instrumentos endodonticos rotatorios de Ni-Ti em odontologia." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264928.

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Orientador: Itamar Ferreira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-12T18:16:51Z (GMT). No. of bitstreams: 1 Almeida_FabianoCosta_M.pdf: 5847726 bytes, checksum: 145c2a03eac9f5421c57057a5a6f9cb6 (MD5) Previous issue date: 2008<br>Resumo: Os instrumentos endodônticos rotatórios de Ni-Ti (limas rotatórias) são utilizados para o preparo dos condutos radiculares e apresentam características de memória de forma, alta flexibilidade e geometria variável. Apesar dessas características, quando solicitados n

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Mamede, Neto Iussif. "Análise multidimensional do preparo de canais radiculares curvos com instrumentos de níquel-titânio em rotação contínua e reciprocante." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6685.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2017-01-04T09:35:23Z No. of bitstreams: 2 Tese - Iussif Mamede Neto - 2016.pdf: 8414229 bytes, checksum: dbd825fbd28378443533fac54c7a09c1 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-01-04T09:59:04Z (GMT) No. of bitstreams: 2 Tese - Iussif Mamede Neto - 2016.pdf: 8414229 bytes, checksum: dbd825fbd28378443533fac54c7a09c1 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on

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Grilo, Tiago José Monteiro Carreirinha. "Sistema de instrumentação mecanizada reciprocante: reciproc®." Master's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4731.

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Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária<br>Introdução Nos últimos anos, a Endodontia tem sofrido inúmeros avanços e melhorias clínicas que ajudaram a tornar o tratamento Endodôntico cada vez mais viável e eficaz. Uma das áreas onde se tem verificado maior investigação e consequente aparecimento e disponibilização de avanços tecnológicos é a instrumentação dos canais radiculares, tais como instrumentação mecanizada com movimentos reciprocantes e sistemas de lima única. Propom

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OLIVEIRA, Henrique Cesar Marcal de. "Avaliação de erros operatórios durante o preparo do canal radicular após o uso de instrumentos rotatórios de níquel-titânio realizados por estudantes e especialistas." Universidade Federal de Goiás, 2010. http://repositorio.bc.ufg.br/tede/handle/tde/1388.

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Made available in DSpace on 2014-07-29T15:22:00Z (GMT). No. of bitstreams: 1 dissertacao henrique c m oliveira.pdf: 1002486 bytes, checksum: eddcaf3f31b0f29703a16146f9f05b7d (MD5) Previous issue date: 2010-02-26<br>The aim of this study was to determine the errors of procedures that occurred during the preparation of curved root canals after the use of instruments níqueltitânio powered motor managed by specialists in endodontics and dental students. Forty upper and lower molars of humans were randomly divided into two groups of 20, according to traders: G1A-(Molars, specialists in endodonti

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Mustafá, Nágila Ali. "Fadiga cíclica flexural de instrumentos Hyflex CM e TF Adaptive em diferentes situações experimentais." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-24052016-153057/.

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O presente estudo teve como objetivo avaliar a resistência à fadiga cíclica flexural dos instrumentos de níquel- titânio, Hyflex CM (Coltène, EUA) e TF Adaptive (SybronEndo, EUA) em diferentes situações experimentais. Todas as limas que foram selecionadas possuíam conicidade 0,04 e diâmetro de ponta 35. Utilizou-se um dispositivo desenvolvido especificamente para realizar o ensaio flexural dinâmico. Os instrumentos TF Adaptive foram divididos em 3 grupos de acordo com o ângulo de curvatura do ensaio: 45º, 60º e 90º e cada grupo subdividido em 2 subgrupos de acordo com o tipo de movimento: rota

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Poveda, Leonardo Medina. "Avaliação da resistência à fadiga cíclica flexural dos instrumentos Reciproc Blue e WaveOne Gold." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/23/23156/tde-27112017-151455/.

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Inquestionavelmente, inovações ocorridas nos últimos anos no preparo do canal radicular revolucionaram o tratamento endodôntico. Dentre elas, destaca-se o tratamento térmico recristalizador da liga de níquel-titânio na confecção de limas endodônticas, o qual aumentou de sobremaneira sua flexibilidade e as capacidades de flexibilidade, torção e resistência à fadiga cíclica flexural quando comparadas às limas de níquel-titânio convencionais fabricadas até então. O presente estudo teve como objetivo avaliar a resistência à fadiga cíclica flexural dos instrumentos de níquel-titânio tratados termic

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Esteves, Cristiane Linge Exposito. ""Influência da técnica de desobturação e do limite de obturação na extrusão apical"." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/23/23135/tde-21012005-102925/.

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O controle da extrusão apical durante a reintervenção endodôntica é essencial para o sucesso do novo tratamento. Nesse contexto, o presente estudo teve como objetivo comparar a quantidade de material sólido extruído na desobturação de canais radiculares variando-se a técnica de esvaziamento e o limite de obturação. Foram utilizados 40 incisivos inferiores previamente tratados divididos em dois grupos de acordo com o limite de obturação estabelecido. Cada grupo foi subdividido em dois subgrupos levando-se em conta a técnica de desobturação empregada; manual (subgrupos A1 e B1) e mecânico-rotató

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LI, UEI-MING, and 李偉明. "Study on the Fracture Mechanisms of Nickel Titanium Rotary Instruments." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/75790509060647015650.

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碩士<br>國立臺灣大學<br>臨床牙醫學研究所<br>89<br>Over the years, the revolutionary development of incorporating nickel-titanium（NiTi）into endodontic files has greatly transformed the methods of root canal instrumentation. They help minimize the undesirable complications often encountered during instrumentation in fine and curved canals. Files made from this alloy are biologically acceptable, highly flexible and considerably stronger in fatigue resistance than stainless steel (SS) files. Despite its increased strength and flexibility, separation is still a concern with NiTi instruments, and they have been rep

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Chi-Jr and 洪啟智. "Influence of Endodontic Irrigants on Fatigue Resistance of Nickel-titanium Instruments." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/18569040895307702610.

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碩士<br>中山醫學大學<br>口腔材料科學研究所<br>96<br>The introduction of NiTi instruments into endodontics has provided the profession with rotary instruments of greater taper, with characteristics of super-elasticity and high strength. However, various factors may cause unexpected fracture during clinical use of NiTi Rotary instruments. NiTi instruments come into contact with irrigants during disinfection or when the solution is present in the pulp chamber and root canal during instrumentation. The aim in this study was to evaluate the effect of immersion in NaOCl or CHX solution on the resistance of Protaper

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Liou, Ji-Uei, and 劉季煒. "Influence after Clinical Use and Sterilization onProFile Nickel-Titanium Rotary Instruments." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/51939690615284637339.

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碩士<br>國立臺灣大學<br>臨床牙醫學研究所<br>96<br>A major concern with use of nickel-titanium engine-driven rotary instruments is fracture without warning. The purpose of this study was to analyze the type and frequency of defects in ProFile nickel-titanium rotary endodontic files after routine clinical use and to draw conclusions regarding the reasons for failure. The differential scanning calorimetric (DSC) studies were utilized to undergo phase transformation within rotary nickel-titanium (Ni-Ti) endodontic instruments of the as-received condition and after more heat sterilization cycles. Static Bending Te

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Chang, Wen-Hsin, and 張文信. "Plasma Immersion Ion Implantation of Nitrogen on Nickel-Titanium Endodontic Instruments." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/60769046913947463614.

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碩士<br>國立臺灣大學<br>臨床牙醫學研究所<br>95<br>The purpose of this study was to investigate the effects of Plasma Immersion Ion Implantation (PIII) surface treatment on cyclic fatigue and cutting efficiency of Ni-Ti instruments. A total of 45 Quantec® NiTi instruments were divided into three groups for PIII treatment: two groups were subjected to 100% nitrogen, 50% nitrogen which was diluted with argon ion individually, and the other group was used as a control group. Cyclic Fatigue test was performed by following ISO 3630-1 specification. Pilot test of cutting efficiency of NiTi files was performed by cut

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Yen, Kuang I., and 顏光毅. "Development of non-destructive testing system applied to nickel-titanium endodontic instruments failure." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/42782479332360192307.

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碩士<br>長庚大學<br>機械工程學系<br>98<br>Conventional endodontic instrument used for cleaning root made from stainless have some problems such as perforation and transportation. More recently Ni-Ti instrument had been wildly used on endodontic treatment because of its pseudo elastic property which can avoid root from perforation or transportation. But in the same time this material property which exist a risk that can’t predictable, the clinical solution is to record it’s using times for a reference. This is necessary to develop an inspection system to detect the instrument for telling us the life time.

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Yeh, Pei-Ying, and 葉沛盈. "Fracture patterns and torsional properties of rotary nickel-titanium instruments after repeated use." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/88270375516301636046.

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碩士<br>國立陽明大學<br>臨床牙醫學研究所<br>93<br>Separation of rotary nickel-titanium (NiTi) instruments is a serious concern in root canal treatment. It is important for the clinician to have detailed research information to provide a rational basis for instrument selection. The purposes of this study were to evaluate the failure patterns of different rotary NiTi instruments in multiple simulated root canal preparations. The fractured instruments were examined under scanning electron microscope (SEM). The torque at fracture of rotary NiTi instruments after multiple uses were also investigated. In this study

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Li, Uei-Ming, and 李偉明. "Development of Nondestructive Testing and Application of Surface Treatment in Nickel Titanium Rotary Instruments." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/11568653405666136182.

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博士<br>國立臺灣大學<br>臨床牙醫學研究所<br>95<br>In the past 10 years, the revolutionary development of incorporating nickel-titanium (Ni-Ti) into endodontic files has greatly transformed the methods of root canal instrumentation. However, there are still a lot of problems demanding solutions till now. Instruments separation and surface blunt after repeated uses are the most concerned problems among them. Although a great deal of research has been undertaken to understand the reasons for instrument fracture, unexpected fractures of previous permanent deformation still occurred. Therefore, develop a possible

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Chou, Ying-fen, and 周瀅芬. "Effects of Nitrogen Ion Implanted Nickel-Titanium Rotary Instruments on Canal Shaping in Simulated Root Canal." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/19001387190409441865.

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碩士<br>國立陽明大學<br>臨床牙醫學研究所<br>98<br>Ni-Ti rotary instruments were used generally in Endodontic treatment. However, suprafacial defects such as metal flash and roller were common in unused Ni-Ti instruments. The defects were formed due to the grinding process of Ni-Ti instrument. Some surface engineering techniques have been used to improve the surface defects. Implantation of nitrogen ion creates a surface layer of titanium nitride (TiN), which can significantly improve cutting efficiency and wear resistance. The purpose of this study was to evaluate the effects of nitrogen ion implanted nickel-

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