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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.
Full textIntrodução 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. Propomo-nos então com a execução deste trabalho, realizar um levantamento relativo ao sistema Reciproc®, acerca de vários factores, tais como a resistência à fadiga cíclica, resistência à fratura dos instrumentos, extrusão de detritos a nível apical, erros de instrumentação, capacidade de remoção de detritos dos canais e tempo de trabalho do sistema Reciproc, bem como à sua comparação com os sistemas ProTaper e WaveOne. Metodologia Elaboração de uma pesquisa bibliográfica recorrendo às bases de dados: Pubmed, B-On e RCAAP, Scielo, Mesh Database e Science Direct com as seguintes palavras-chave: “Continuous Rotation”, “Reciprocating Motion”, “Single-file”, “Instrumentation”, “ WaveOne”, “ProTaper”, “Reciprocating”, “cyclic fatigue”, “torsional resistance”, “endodontic instruments”, “nickel-titanium”, “canal curvature”, “endodontic treatment” e “rotary systems” Conclusão Com a realização deste trabalho podemos constatar que o sistema Reciproc® se apresenta como uma excelente opção, apresentando os melhores resultados, relativamente à fadiga clinica e resistência à fractura, capacidade de limpeza e redução do tempo de trabalho. Recomendamos a execução de mais estudos sobre o tema aumentando as amostras em estudo e realizando estudos in vitro. Introduction During the last years, Endodontic’s has suffered a huge development and clinical improvements that helped to make the endodontic treatments more viable and effective. One of the areas where there has been more research and consequent appearance and availability of technological advances is the instrumentation of root canals, such as mechanical instrumentation with reciprocating movements and single file systems. We propose with the execution of this work, to perform a survey on the Reciproc® system on various factors, such as resistance to cyclic fatigue, fracture resistance of the instruments, extrusion of debris at the apical level, instrumentation errors, capacity debris removal channels Reciproc system and working time, as well as its comparison with ProTaper and Waveone systems. Methodology Bibliographic research was performed using databases such as Pubmed, B-On, RCAAP, Scielo, Mesh Database and Science Direct with the following key-words: “Continuous Rotation”, “Reciprocating Motion, “Single-file”, “Instrumentation”, “WaceOne”, “ProTaper”, “Reciprocating”, “cyclic fatigue”, “torsional resistance”, endodontic instruments”, “nickel-titanium”, “channel curvature”, “endodontic treatment” and “rotary systems”. Conclusion With this work we conclude that the Reciproc® system is presented as an excellent option, with the best results in relation to clinical fatigue and fracture resistance, cleanability and reduction of working time. We recommend running more studies on the subject by increasing the samples analyzed and performing in vitro studies.
Spicciarelli, Valentina. "NEW TRENDS AND SIMPLIFICATION IN ENDODONTICS: ARE THEY MEANT TO STAY OR IS IT JUST A HYPE?" Doctoral thesis, Università di Siena, 2019. http://hdl.handle.net/11365/1073478.
Full textGonçalves, 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.
Full textIntrodução: 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: Realizou-se uma pesquisa bibliográfica recorrendo às bases de dados da Pubmed, B-On e RCAAP com as seguintes palavras-chave: “ WaveOne”, “ProTaper”, “Reciprocating”, “cyclic fatigue”, “torsional resistance”, “endodonticinstruments”, “nickel-titanium”, “canal curvature”, “endodontictreatment” e “rotarysystems”. Resultados: Da análise e estudo dos artigos utilizados nesta dissertação, pode concluir –seque Reciproc apresenta mais vantagens do que os restantes sistemas. Introduction: Comparison of the different aspects involved in three rotary instrumentation systems. Aims: Evaluate and compare the resistance to cyclic fatigue and fracture of instruments used in systems WaveOne, Reciprocating and ProTaper, as well as iatrogenic perforations, extrusion of debris at the apical level, detours and false paths, debris removal capacity and working time. Methodology: We performed a search using the bibliographic databases PubMed, and B-on RCAAP with the following keywords: "WaveOne", "ProTaper", "Reciprocating", "cyclic fatigue", "torsional resistance", "endodontic instruments "," nickel-titanium "," channel curvature "," endodontic treatment "and" rotary systems ". Results: With the analysis and study of the articles used in this dissertation, it can be concluded that Reciproc has more advantages than other systems.
Versiani, Marco Aurelio. "Avaliação do preparo biomecânico e da obturação de canais radiculares ovais promovidos pelos sistemas de instrumento único WaveOne, Reciproc e SAF." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/58/58133/tde-22052012-164928/.
Full textThe purpose of this ex vivo study was to evaluate the biomechanical preparation and obturation of root canals using ProTaper, WaveOne, Reciproc and Self-Adjusting File systems. It was evaluated: 1) area, perimeter, roundness, major diameter, minor diameter, surface area, volume and SMI after biomechanical preparation, using microcomputed tomography (μTC), 2) percentage volume of voids in the obturation material by means of μTC, 3) bond strength (BS) and type of failure after the pushout test, and 4) the analysis of the interface dentin / filling material using scanning electron microscopy (SEM). One-hundred human mandibular canines were scanned in the SkyScan 1174v.2 device. After preparing the coronal third of the canals, the teeth were divided into 4 groups (n=25), according to the biomechanical preparation system used: ProTaper, WaveOne, Reciproc, and Self-Adjusting File (SAF). After the second TC, eigthteen specimens of each group were assigned to two groups (n=9), according to the obturation technique: the Modified Continuous Wave of Condensation Technique and the technique recommended by the manufacturer. The remaining seven specimens of each group were used as negative and positive controls. After scanning, the obturated specimens were sectioned perpendicularly to its long axis into 1-mm slice thickness of the coronal, middle and apical thirds. The bond strength (BS) was performed by the push-out test and, after dislodgments, the failures were observed in a digital microscope. The specimens were processed for SEM analysis to observe bonding interface formation and resin tag density using a four-step scale method. Overall, the analysis of the biomechanical parameters showed that the most significant changes in the root canal occurred in the ProTaper group and WaveOne groups. Reciproc results were in an intermediate level and smaller changes were observed in the SAF group (ANOVA, p<0.05). In the coronal third, the Modified Continuous Wave of Condensation Technique showed a lower percentage volume of voids than the technique recommended by the manufacturer (Kruskal-Wallis test, p<0.05). After the push-out test, the analysis indicated the mean BS (MPa) was significantly higher in specimens filled by the manufacturer\'s technical than the Modified Continuous Wave of Condensation Technique (t test for independent samples, p<0.05). The adhesive failures were frequent in all groups. The Modified Continuous Wave of Condensation Technique showed the highest percentage of adhesive failure in dentin while in the technique recommended by the manufacturer, mixed failure was predominant. Overall, in SEM analysis, no tags were observed in most of the specimens filled by the Modified Continuous Wave of Condensation Technique. When present, they were small and irregularly distributed. The specimens filled by the technique recommended by the manufacturer showed long and well-distributed tags, especially in the apical third (Friedman test, p<0.05). It was concluded that all systems promoted root canal changes after the biomechanical preparation, the obturation technique recommended by the manufacturer resulted in a higher volume of voids in the coronal third and BS of the Modified Continuous Wave of Condensation Technique group.
Costa, Tatiana Dias. "Avaliação da resistência à corrosão das limas endodônticas Protaper® Universal, Mtwo®, Reciproc® e Wave-One® imersas em solução de hipoclorito de sódio a 5,25%." Universidade Federal de Juiz de Fora, 2014. https://repositorio.ufjf.br/jspui/handle/ufjf/1356.
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Neste estudo foi testada a hipótese de que instrumentos endodônticos fabricados com a liga de NiTi com tratamento térmico M-Wire são mais resistentes à corrosão em solução de NaOCl. Avaliou-se, por ensaio de polarização potenciodinâmica, a resistência à corrosão de 14 limas de NiTi sem tratamento de superfície (ProTaper® Universal Finishing 2 – F2, n = 7 e Mtwo® 25.07, n = 7) e de 14 limas de NiTi com tratamento de superfície (Reciproc® R25 25.08, n = 7 e Wave- One® Primary 25.08, n = 7), quando imersas em solução irrigante de NaOCl a 5,25%. Em miscroscópio eletrônico de varredura, as micromorfologias das 28 limas testadas foram analisadas antes e após o ensaio eletroquímico. As curvas de polarização anódica foram obtidas com potencial de varredura que iniciou no Ecorr de cada lima, com uma taxa de 0,333 mV/segundos (1,2 V/hora) até os Epite, sendo considerada como faixa passiva, a região onde os valores de potencial tinham densidade de corrente inferior a 10-5 A/cm2. A fim de se comparar as médias dos grupos aos pares foi empregada a prova não paramétrica de Mann-Whitney, utilizando-se o software estatístico SPSS-15 e o nível de significância adotado foi de p < 0,05. As curvas de polarização anódica demonstraram que todas as limas testadas foram passíveis de corrosão na solução de NaOCl a 5,25% (pH = 6,5). Observou-se que, no geral, apenas entre as limas Mtwo® (sem tratamento térmico) e Reciproc® (com tratamento térmico) não houve diferença estatisticamente significante para Epite ECS e Epite-Ecorr (p = 1,000). Ao se comparar, aos pares, as limas sem tratamento térmico (ProTaper® Universal F2 e Mtwo®) com as limas com tratamento térmico (Reciproc® e Wave-One®) não houve diferença estatisticamente significante (Ecorr ECS, p = 1,000; Epite ECS, p = 0,265; Epite-Ecorr, p = 0,265). A lima Reciproc® foi a que se apresentou mais resistente à corrosão e a ProTaper® foi a lima que mais sofreu corrosão na solução testada. Assim, a hipótese inicial de que instrumentos endodônticos fabricados com a liga de NiTi com tratamento térmico MWire são mais resistentes à corrosão em solução de NaOCl foi negada.
This study tested the hypothesis that endodontic instruments manufactured with the NiTi alloy heat treated M-Wire are more resistant to corrosion in NaOCl solution. Was evaluated by potentiodynamic polarization test, the corrosion resistance of NiTi files 14 without surface treatment (Universal ProTaper® Finishing 2 - F2, n = 7 and Mtwo® 25.07, n = 7) and 14 files NiTi with surface treatment (R25 Reciproc® 25.08, n = 7 and Primary Wave-One® 25.08, n = 7), when immersed in irrigating solution of NaOCl 5.25%. In electronic scanning microscopy, the micromorfologies of 28 tested files analyzed before and after the electrochemical test. The anodic polarization curves obtained by scanning the potential Ecorr that initiated in each file with a rate of 0.333 mV/sec (1.2 V/minute) to the Epite, being considered passive track, the region where the values potential had density of less than 10-5 A/cm2 current. In order to compare the averages of the groups in pairs used to non-parametric Mann-Whitney test, using the SPSS-15 statistical software and the significance level was p < 0.05. The anodic polarization curves show that all tested files are liable to the corrosion solution of 5.25% NaOCl (pH = 6.5). It was observed that, in general, only between Mtwo® (without heat treatment) and Reciproc® (heat treated) files there was no statistically significant difference for Epite ECS and Epite- Ecorr (p = 1.000). When comparing in pairs, the files without heat treatment (ProTaper® Universal F2 and Mtwo®) with files with heat treatment (Reciproc® and Wave-One®) there was no statistically significant difference (Ecorr ECS, p = 1.000; Epite ECS, p = 0.265; Epite-Ecorr, p = 0.265). The Reciproc® file introduced more resistant to corrosion and the ProTaper® was the file that suffered most corrosion in the tested solution. Thus, the initial hypothesis that endodontic instruments manufactured with the NiTi heat treated M-Wire are more resistant to corrosion in a solution of NaOCl was refused.
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/.
Full textInnovations that have occurred in recent years in the preparation of the root canal have revolutionized endodontic treatment. Among them, the heat treatment of the nickel-titanium alloy in the manufacture of endodontic files, which greatly increased the flexibility, torsional and flexural fatigue resistance capacities when compared to the conventional nickel-titanium files manufactured until then. The present study aimed to evaluate the resistance to flexural cyclic fatigue of thermally treated Reciproc Blue R25 (VDW) and WaveOne Gold Primary (Dentsply-Maillefer) instruments in a device specifically developed to perform dynamic flexural tests. The selected files had taper 0.08 mm and 0.07 mm respectively, with tip diameters of 0.25 mm and were used in the reciprocating movement of each system in the VDW Silver Reciproc (VDW) electric motor. The instruments were divided into 2 groups of 15 files and tested in simulated steel channels with angle of 60º and radius of curvature of 5mm. The number of cycles and the time in seconds until the occurrence of fracture of the instruments were recorded and statistically evaluated. The Reciproc Blue R25 files presented significantly better performance (p <0.05), by the higher number of cycles and time to fracture when compared to WaveOne Gold files. Thus, it was concluded that the Reciproc Blue R25 system was safer than the WaveOne Gold Primary reciprocating system in terms of resistence of flexural fatigue
Cavalcante, Thiane Elys Prado Arruda. "Análise da eficácia do instrumento RECIPROC #25 em atingir o forame apical sem glide path." Universidade do Estado do Rio de Janeiro, 2012. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3923.
Full textThe aim of the present studywas to evaluate the effectiveness of the Reciproc #25 instrument in reaching the apical foramen of mandibular molars root canals without any manual glide path. For this, a general sample of 300 mandibular molars was radiographed and graded accordantly the degree of curvature (Schneiders criteria) classes I and II. After applying the inclusion and exclusion criteria, a total of 502 root canals were included to form the two experimental groups: 253 canals in the class Igroupand 249 in the class II group. All canals were instrumented directly with R25 file, without any manual glide path, carefully following the manufactures guidelines. The pooled results of two experimental groups showed that the R25 instrument was able to reach the apical foramen without glide path in 93.4% of the cases. In 6.4%, the instrument R25 was unable to reach the apical foramen and in only 0.2% of the cases occurredinstrument fracture (one fracture in the class I group andnone in the class II group). The chi-square test was accomplished to verify that a certain class of channels is more associated with or without the need for glide path when the Reciproc system is used. . In the group of class II molar higher number of channels (23) that the instrument was not able to go to the apical foramen than in the molar class I (9), and this difference was statistically significant (Chi-square test, p = 0.020, X2 = 5.452) Within the experimental conditions of this study, it can be concluded that the file R 25 showed to be a highly effective instrument in the instrumentation of the entire length of the canals of mandibular molars class I and II without prior glide path. In addition, the instrumentation system was shown to be highly safe in the rate of fracture.
Pillar, Rafael. "ANÁLISE COMPARATIVA DOS SISTEMAS DE INSTRUMENTO ÚNICO RECIPROC, WAVEONE E ONE SHAPE NA INCIDÊNCIA DE DEFEITOS DENTINÁRIOS." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/6105.
Full textDentinal defects are characterized by cracks in the root dentin that can develop into a vertical root fractures (VRF), thus leading to tooth loss. Endodontic procedures may generate these defects and between these steps, the biomechanical preparations with NiTi rotary instruments are associated with the incidence of these amendments dentinal. A new concept in minimally invasive preparation was introduced, along with a new reciprocating movement, using a single instrument for root canal instrumentation. This allows less root dentin is removed, thus avoiding the weakening of tooth structure. The aim of this study was evaluate the incidence of dentinal defects after root canal preparation by three single-file systems. One hundred forty mesial roots of mandibular molars were selected and randomly assigned to 4 groups (n= 35 mesial roots per group). One group was left unprepared as control. In two groups, the root canals were instrumented by using the reciprocating single-file systems WaveOne (Dentsply-Maillefer) and Reciproc (VDW), while other group was prepared with single-file of continuous rotation One Shape (Micro-Mega). The specimens were sectioned in 03, 06 and 09 mm from the apex with a low-speed saw under water cooling (IsoMet 1000 Precision Saw) and observed through a stereomicroscope (Zeiss Stemi SV6, Carl Zeiss) at a magnification of 20×. The pictures were recorded and evaluated by two blinded calibrated observers. The slices were categorized in: 0- No defects; 1- Others defects and 2 vertical root fracture. The dates were statistically analyzed with a significance level set at α = 0.05. The chi-square and Fisher exact tests were used to assess the differences between groups. No defects were observed in control group. All the experimental groups showed dentinal defects. The reciprocating files were associated with more defects than the continuous rotary file and control group (P < 0.05), but no significant difference between them (P = .115). VRF was observed only in the One Shape group. The results of this study suggest that the biomechanical preparation could cause damage in the root dentin and that the continuous rotary has a tendency to result in fewer defects compared to reciprocating files.
Defeitos dentinários são caracterizados por trincas na dentina radicular que podem evoluir para uma Fratura Vertical da Raiz (FVR), levando assim a perda do elemento dentário. O preparo biomecânico com o uso de sistemas rotatórios está associado com a incidência dessas alterações dentinárias. Atualmente, o uso de um único instrumento para a instrumentação dos canais radiculares juntamente com uma cinemática reciprocante tem sido introduzido. Desse modo, o objetivo desse estudo foi avaliar a incidência de defeitos dentinários causado por três sistemas de instrumento único. Cento e quarenta raízes mesiais de molares inferiores foram selecionadas e aleatoriamente divididas em quatro grupos (n= 35 por grupo). Um grupo não sofreu intervenção e serviu como controle. As demais raízes foram preparadas pelos instrumentos reciprocantes WaveOne (Dentsply-Maillefer) e Reciproc (VDW) e por um instrumento de rotação contínua One Shape (Micro-Mega). As raízes foram seccionadas horizontalmente com auxílio de uma máquina de corte de precisão (IsoMet 1000 Precision Saw) em 03, 06 e 09 mm a partir do ápice e observadas em um estereomicroscópio (Zeiss Stemi SV6, Carl Zeiss) sob um aumento de 20×. Imagens das fatias foram gravadas e avaliadas por dois observadores cegos, previamente calibrados. As fatias foram categorizadas em: 0 - Ausência de defeitos; 1- Outros defeitos; 2- Fratura Vertical da Raiz. Os resultados obtidos foram submetidos à análise estatística com nível de significância fixado em α= 0.05. Os testes Qui-quadrado e Exato de Fisher foram utilizados para analisar e comparar as diferenças entre os grupos. O grupo controle não apresentou defeito. Todos os grupos experimentais apresentaram defeitos dentinários e foram diferentes estatisticamente do grupo controle (P < 0.05). Os grupos reciprocantes foram associados à presença de mais defeitos do que o grupo One Shape, mas não houve diferença significante entre eles (P = .115). O grupo One Shape foi o único que apresentou FVR. Os resultados obtidos nesse estudo sugerem que o preparo biomecânico com instrumentos rotatórios e/ou de reciprocidade podem causar danos na dentina radicular.
DONIDA, Fernanda Araújo. "Influência da geometria de canais curvos simulados no número de ciclos até a fratura (NCF) instrumentos RECIPROC®." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16925.
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CAPES
Objetivo Avaliar a influência da geometria de canais curvos simulados no número de ciclos até a fratura (NCF) de instrumentos Reciproc®. Metodologia Foram confeccionados quatro canais simulados em aço inoxidável com geometrias diferentes variando o comprimento de arco, o raio de curvatura e a posição da curvatura radicular. Uma plataforma de suporte da peça de mão também foi confeccionada em aço inoxidável com o objetivo de coincidir a trajetória vertical do instrumento instalado na peça de mão com o eixo longitudinal da parte reta do canal simulado. Foram selecionados 40 instrumentos R25, alocados por sorteio em 4 grupos (A, B, C e D), de maneira que cada grupo foi instrumentado com 10 amostras cada. Os ensaios de fadiga foram realizados e o tempo decorrido até a visualização da fratura ocorrer foi cronometrado. O número de ciclos até a fratura (NCF) foi obtido pela multiplicação da velocidade de rotação, em segundos, pelo tempo decorrido até a fratura em flexão rotativa da cada instrumento, também em segundos. Os resultados obtidos foram submetidos ao teste estatístico de Mann-Whitney, com 95% de confiança (p≤0,05). Resultados Ao comparar a geometria do Canal A com Canal B o instrumentos R25 obteve um maior número de ciclos até a fratura no canal A. Comparando o Canal A ao Canal C, foi constatado que o instrumento R25 é mais resistente quando utilizado em canais com raios maiores. Ao comparar o Canal A com o Canal D, foi comprovado que, os instrumentos R25 se mostraram mais resistentes quando utilizados em canais com um menor comprimento de arco. Conclusão A intensidade do estresse sobre o instrumento aumenta à medida que o raio da curvatura diminui, ou quando se aumenta o comprimento do arco, como também quando o arco esta localizado na porção coronária do canal.
Aim To evaluate the influence of simulated curved canals geometry in the number of cycles to failure (NCF) of Reciproc® instruments. Methodology Four Stainless steel simulated channels with different geometries were made by varying the arc length, the radius of curvature and the position of the root curvature. A hand piece support platform was also made of stainless steel in order to match the vertical trajectory of the instrument installed in the handpiece to the longitudinal axis of the straight part of the simulated canal. Forty (40) R25 instruments were select, allocated by lot in 4 groups (A, B, C e D) of 10 samples each. The fatigue tests were performed and the time until the fracture could be visualized was chronometrically measured. The number of cycles to fracture (NCF) was obtained by multiplying the rotation speed, in seconds, by the time until fracture of each rotating bending tool, also in seconds. The results were submitted to the statistical Mann-Whitney test, with 95% confidence (p≤0,05). Results By comparing the geometry of the channel A to channel B, R25 instruments obtained a larger number of cycles to fracture comparing the channel A. Comparing Channel A to Channel C, it was found that the R25 instrument is more resistant when used in channels with larger ratius. When comparing Channel A with Channel D, it was proven that the R25 instruments were more resistant when used in channels with a shorter arc length. Conclusions The intensity of stress on the instrument increases as the radius of curvature decreases, as the arc length increases, as well as when the arc is located on the coronal portion of the channel.
Chiarella, Montoya Sara Grecia. "Comparación in vitro de la cantidad de debris apical extruido tras la utilización de una técnica manual, un sistema rotatorio y un reciprocante." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2015. http://hdl.handle.net/10757/581920.
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Pereira, Isabel. "Cyclic fatigue behaviour of wave one gold compared to reciproc blue instruments." Master's thesis, 2017. http://hdl.handle.net/10451/29545.
Full textINTRODUCTION: Mechanical files have drastically altered the treatment protocol in endodontics, allowing for quicker and easier treatment times and more thorough debridement of the canal system. Despite the advantages of the Ni-Ti alloy files, instrument separation still remains a major concern when using these files. OBJECTIVES: The purpose of this study was to compare the cyclic fatigue behavior of WaveOne® Gold instruments and compare it to Reciproc® Blue instruments. MATERIAL AND METHODS: Forty nickel-titanium files of WOG and RB systems were analyzed in this study. Files were divided into 4 experimental groups (n=10):Group A1: WaveOne® Gold Primary files without sodium hypochlorite, Group A2: Reciproc® Blue files without sodium hypochlorite, Group B1: WaveOne® Gold Primary with sodium hypochlorite and Group B2: Reciproc® Blue with sodium hypochlorite. A mechanical device was used to simulate the root canal system , a radius of curvature 4,7mm and an angle of curvature 45º. Each WOG and RB files, were submitted to a respectively, rotational speed of 350 rpm and 300 rpm . The time to fracture was registered with a digital chronometer until tip separation occurred. The number of cycles to fracture was calculated by multiplying time by rotational speed. The fracture length was measured with a manual caliper. Data obtained was recorded and statistically analyzed using the non-parametric Mann-Whitney U test or the independent t-student test taking into account the results of the normality tests previously applied. Significance was set at 95% confidence level. RESULTS: B2 instrument proved to be statistically more resistant to cyclic fatigue than A1, A2 and B2. CONCLUSION: Within the limitations of this study, Reciproc® Blue files with irrigation demonstrated statistically greater resistance to cyclic fatigue. Clinicians should be aware of the mechanical properties to choose the best file, selecting systems with higher fracture resistance to cyclic fatigue.
Hiller, Sandra. "Vergleichende In - vitro - Studie zur maschinellen Wurzelkanal präparation mit den NiTi - Single - File - Systemen RECIPROC ® , Wave One ™ und One Shape ®." Doctoral thesis, 2015. http://hdl.handle.net/11858/00-1735-0000-0022-5F7E-D.
Full textMroue, Sawsan. "Instrumentação em endodontia com instrumentos reciprocantes." Master's thesis, 2019. http://hdl.handle.net/10284/8429.
Full textThe development of new technologies in Endodontics has helped the dentist to perform an increasingly safer procedure, fast and comfortable for the patient. The present work aims to study the reciprocating instrumentation, reviewing the literature about its main characteristics and advantages in relation to the use of the instruments by continuous rotation. Through the search engines Bireme, SciELO, LILACS, PubMed, CAPES Journals, a limited search was conducted to articles in English and Portuguese, published between 2007 and 2019, using the key words, "Reciproc®", "Reciproc Blue®", "Root canal", "mechanical instrument", "NiTi AND Endodontic Instrument", where 175 articles were found, of which 48 obeyed the criteria established in the present research. Reciprocating systems may be considered to provide a relatively practical and rapid technique, with a lower risk of cross-infection, for using only a single-use instrument. It becomes necessary to carry out new studies to elucidate other circumstances relevant to the effectiveness of the canal preparation with this proposal.
Karam, Fida EL Tawil. "Single file preparation: Reciproc® and Reciproc® Blue." Master's thesis, 2017. http://hdl.handle.net/10284/6200.
Full textThe expanded use of nickel-titanium (NITI) rotary instruments root canal procedures has led to the development of a wide variety in shapes,designs and applications.This literature review present the single file preparation.The first part develops the metallurgy of the NITI alloy.the second part focus on the reciprocating movement. In the last part we present the reciprocating systems and compare their mechanical properties. For the accomplishment of the present work a bibliographical revision was made, this year, using several online search engines ; Pubmed and articles from VDW and DENTISPLY official sites.
Camilo, Ana Filipa Machado. "Sistemas de instrumentação reciprocante: Reciproc® e Reciproc Blue®." Master's thesis, 2017. http://hdl.handle.net/10284/6458.
Full textEndodontics is increasingly important in the realization of several cases of the day-to-day life of a general practitioner. The instrumentation of root canals is one of the key points for the success of an Endodontic, where the mechanical chemical preparation has the cleaning functions, disinfection and modeling of the root canal, so that it can receive the shutter material. This work aims to describe, through a literary review, two types of systems of Single Files and alternate movements: Reciproc ® and ReciprocBlue ®, identifying the main characteristics andrelevance as a therapeutic measure in clinical practice. Methodologically, it has been decided to make a literary review based on a survey of articles in online databases as well as using the query of books in digital format.
Almeida, Ana Sofia Morgado Pinto Fonseca e. "Técnicas e sistemas de desobturação canalar no retratamento endodôntico não cirúrgico." Master's thesis, 2016. http://hdl.handle.net/10284/5748.
Full textIn clinical practice, the diversity of manual, rotatory and reciprocating instruments complicates the selection of the system to be used for nonsurgical dental retreatment. This study aimed to compare different instruments regarding different parameters: removability of Gutta-Percha (GP), apical extrusion of debris, fracture of instruments and occurrence of iatrogenic processes. In this study, we used 111 publications later to 2011, obtained through PubMed e Science Direct. The bibliographic analysis indicates that, regardless of the system, it is not possible to remove all the filling material of the root walls and the difficulty of this task is higher for curved canals and in the apical area. It appears that the removal of GP improves towards H files, ProTaper and Mtwo. The Reciproc system was associated with better performance and lower working time, when compared with rotatory systems The considered instruments are not capable of fully preventing the apical extrusion of debris. Despite the different results, most studies assume that the Reciproc system produces the least apical extrusion of debris. In Endodontics, the two main causes of instrument fracture are cyclic fatigue and torsion. Most studies agree that the reciprocating movement, as in the Reciproc system, increases the fracture toughness and resistance to torsion, while maintaining the original canal anatomy. Regarding the production of perforations and root fractures, the superiority of NiTi instruments compared to manual files was not clear. According to the literature, the Reciproc system, made of NiTi alloy M-Wire, is associated with less frequent iatrogenic events. Finally, it is concluded that future studies would be beneficial to clarify the potential of the different systems analyzed.
Li-Yun, Hsu, and 許黎云. "Reciprocal Spyte Strategies used in Elementary School Life Curriculum— A Study of Aesthetic Experience as an example Rhythmic Instrument." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/10836219973533239482.
Full textReicherts, Pamela. "Effektivität von reziprok und rotierend arbeitenden Nickel-Titan-Instrumenten zur Revisionsbehandlung an gekrümmten Molaren - Eine Mikro-Computertomografie-Studie -." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0003-C10D-5.
Full textMutsindikwa, Canisio. "The role of social capital in undocumented migration : the case of undocumented Zimbabwean migrants in Botswana." Diss., 2013. http://hdl.handle.net/10500/9487.
Full textSociology