Littérature scientifique sur le sujet « Self-Adjusting File »
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Articles de revues sur le sujet "Self-Adjusting File"
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ADIGÜZEL, Özkan. « A Literature Review of Self Adjusting File ». International Dental Research 1, no 1 (15 avril 2011) : 18. http://dx.doi.org/10.5577/intdentres.2011.vol1.no1.4.
Texte intégralRésumé :
A primary aim of root canal treatment is to completely clean and shape the root canal system. Various instruments are available for endodontic instrumentation. Although rotary systems do prepare many canals without major procedural errors, they do not address canal types with long-oval or flat cross sections. A newly developed self-adjusting file (SAF) was designed to address the shortcomings of traditional rotary files by adjusting itself to the canal cross section. This instrument consists of a compressible opened NiTi tube that, on placement into a root canal, will exert pressure against the canal Wall. The SAF is used in an in-and-out motion powered by a handpiece and under constant irrigation. The aim of this review was to describe instrument design, usage parameters and features of Self Adjusting File.
How to cite this article: Adıgüzel Ö. A Literature Review of Self Adjusting File. Int Dent Res 2011;1:18-25.
Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.
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Nayak, Ankit, PK Kankar, Prashant K. Jain et Niharika Jain. « Force and vibration generated in apical direction by three endodontic files of different kinematics during simulated canal preparation : An in vitro analytical study ». Proceedings of the Institution of Mechanical Engineers, Part H : Journal of Engineering in Medicine 233, no 8 (5 juin 2019) : 839–48. http://dx.doi.org/10.1177/0954411919854574.
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During root canal shaping, pain could result from the high level of force or vibration generated. This could be related to file kinematics or geometry. In the present study, a comparison is made between forces and vibrations generated by endodontic files having three different kinematics. Square pillar resin blocks were used as simulated root canals to study forces and vibrations generated by the file having reciprocating motion (WaveOne Gold), transline motion (Self-Adjusting File), and rotary motion (2Shape). The forces and vibrations were measured using the dynamometer and accelerometer, respectively. Recorded time domain signals were processed in MATLAB to calculate the root mean square value. A one-way analysis of variance and Tukey’s test for post hoc comparison at 95% confidence interval were applied over the root mean square data of different files. From a statistical analysis of the file systems, the null hypotheses could not be accepted ( P < 0.05) as 95% of the confidence interval. Differences between the means were statistically significant. The root mean square values of force and vibration for WaveOne Gold significantly exceeded those of Self-Adjusting File, 2Shape1, and 2Shape2 while the root mean square values of vibration for 2Shape1 and 2Shape2 were significantly less than the Self-Adjusting File; however, the root mean square value of force for the 2Shape2 was significantly more than for the Self-Adjusting File. Under the present experimental conditions, significant differences in the root mean square values of force and vibration of the three endodontic files of different kinematics have been observed. The WaveOne Gold file system generated higher apical force and vibration than the transline and rotary file system.
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Hof, Rafael, Valery Perevalov, Moshe Eltanani, Raviv Zary et Zvi Metzger. « The Self-adjusting File (SAF). Part 2 : Mechanical Analysis ». Journal of Endodontics 36, no 4 (avril 2010) : 691–96. http://dx.doi.org/10.1016/j.joen.2009.12.028.
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Neves, M. A. S., I. N. Rôças et J. F. Siqueira. « Clinical antibacterial effectiveness of the self-adjusting file system ». International Endodontic Journal 47, no 4 (6 juillet 2013) : 356–65. http://dx.doi.org/10.1111/iej.12151.
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Kaul, Shalan, Feby Kuriakose, Jittin James, Basil Joy et Reema Malik. « Evaluation of Radicular Dentin Microcracks Formation after Instrumentation with NiTi Hand and Rotary File System : A Stereomicroscopic Study ». Journal of Contemporary Dental Practice 21, no 11 (2020) : 1233–37. http://dx.doi.org/10.5005/jp-journals-10024-2955.
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ABSTRACT Aim and objective The present study aimed to assess the formation of microcracks in root dentin post-instrumentation with nickel–titanium (NiTi) hand and rotary file system. Materials and methods Totally, 80 freshly extracted mandibular premolar teeth with single roots were chosen for this study. Access opening was performed and #10 K-file was used to attain patency of canal. All specimens were divided into four groups (each group having 20 specimens), i.e., Group I: Unprepared, Group II: NiTi hand K-files, Group III: Self-adjusting file, and Group IV: XP-Shaper single file. Complete irrigation of all the canals was performed after instrumentation. All roots were cut horizontally at three levels [apical third (3 mm), middle third (6 mm), and cervical third (9 mm)] from the apex with diamond disc. A stereomicroscope was used to view the sections under 20× magnification. Results Self-adjusting file showed least number of defects with a percentage of 75% followed by XP-Shaper and NiTi hand K-files with a values of 65 and 60%, respectively. Use of hand K-files resulted in greater number of incomplete cracks (30%) and use of XP-Shaper demonstrated greater number of craze lines (15%). A statistically significant difference was found between the experimental groups in the formation of dentinal defects of root at apical third (3 mm) (p < 0.031) and middle third (6 mm) (p < 0.001), whereas the sections at cervical third (9 mm) did not show any statistically significant difference (p > 0.312). Conclusion The present study concluded that the self-adjusting file system gives promising better results in cleaning ability with minimal incidence of radicular dentin microcracks than XP-Shaper and NiTi hand K-files system. Clinical significance The root dentin may unavoidably get damaged during instrumentation resulting in the formation of dentinal cracks and tiny complicated fractures, thus leading to endodontic failures. Various factors cause dentinal cracks, but the flexibility of file due to heat treatment, kinematics of the file, and the basic architecture of the file are the most significant ones. Self-adjusting file system represented satisfactory results with minimal microcracks defects. How to cite this article Kumar A, Kaul S, Kuriakose F, et al. Evaluation of Radicular Dentin Microcracks Formation after Instrumentation with NiTi Hand and Rotary File System: A Stereomicroscopic Study. J Contemp Dent Pract 2020;21(11):1233–1237.
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Topcu, K. Meltem, Ertugrul Karatas, Damla Ozsu et Ibrahim Ersoy. « Efficiency of the Self Adjusting File, WaveOne, Reciproc, ProTaper and hand files in root canal debridement ». European Journal of Dentistry 08, no 03 (juillet 2014) : 326–29. http://dx.doi.org/10.4103/1305-7456.137636.
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ABSTRACT Objectives: The aim of this study was to compare the canal debridement capabilities of three single file systems, ProTaper, and K-files in oval-shaped canals. Materials and Methods: Seventy-five extracted human mandibular central incisors with oval-shaped root canals were selected. A radiopaque contrast medium (Metapex; Meta Biomed Co. Ltd., Chungcheongbuk-do, Korea) was introduced into the canal systems and the self-adjusting file (SAF), WaveOne, Reciproc, ProTaper, and K-files were used for the instrumentation of the canals. The percentage of removed contrast medium was calculated using pre- and post-operative radiographs. Results: An overall comparison between the groups revealed that the hand file (HF) and SAF groups presented the lowest percentage of removed contrast medium, whereas the WaveOne group showed the highest percentage (P < 0.001). The ProTaper group removed more contrast medium than the SAF and HF groups (P < 0.05). Conclusions: None of the instruments was able to remove the contrast medium completely. WaveOne performed significantly better than other groups.
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Metzger, Zvi. « The self-adjusting file (SAF) system : An evidence-based update ». Journal of Conservative Dentistry 17, no 5 (2014) : 401. http://dx.doi.org/10.4103/0972-0707.139820.
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Kim, Hyeon-Cheol, Sang Yup Sung, Jung-Hong Ha, Michael Solomonov, Jung-Min Lee, Chan-Joo Lee et Byung-Min Kim. « Stress Generation during Self-Adjusting File Movement : Minimally Invasive Instrumentation ». Journal of Endodontics 39, no 12 (décembre 2013) : 1572–75. http://dx.doi.org/10.1016/j.joen.2013.07.021.
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Solomonov, Michael. « Eight Months of Clinical Experience with the Self-Adjusting File System ». Journal of Endodontics 37, no 6 (juin 2011) : 881–87. http://dx.doi.org/10.1016/j.joen.2011.02.036.
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Shenvi, Suresh, et VASUNDHARA SHIV ANNA. « SELF-ADJUSTING FILES (SAF) A FILE WITH A WILL OF ITS OWN-A REVIEW ». CODS Journal of Dentistry 3, no 1 (2011) : 42–45. http://dx.doi.org/10.5005/cods-3-1-42.
Texte intégralThèses sur le sujet "Self-Adjusting File"
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Ribeiro, Marcus Vinícius de Melo. « Avaliação da capacidade de limpeza do sistema Self Adjusting File (SAF), em comparação com instrumentos rotatórios, em canais achatados ». Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/58/58133/tde-22052012-141741/.
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A limpeza e modelagem dos canais radiculares consiste em uma etapa fundamental para o sucesso da terapia endodôntica. O objetivo deste estudo foi avaliar um novo conceito de instrumento endodôntico Self Adjusting File (SAF), e instrumentos rotatórios de NiTi, na capacidade de limpeza de canais achatados por meio de microscopia óptica. Vinte e dois incisivos inferiores instrumentados com instrumentos rotatórios K3 (n=11) e sistema SAF (n=11), tiveram seus terços apicais submetidos ao processamento histológico e analisados em microscopia óptica (40×). As imagens capturadas pelo software Adobe Photoshop 5.1 foram analisadas com auxilio de grade de integração do software Image J. O perímetro de ação dos instrumentos nas paredes dos canais radiculares foi determinado com auxilio do software Image J e uma mesa digital Bamboo. Os dados obtidos foram submetidos à análise de variância e teste de T não pareado corrigido pelo teste de Welch, considerando-se a presença de debris no terço apical e a superfície de dentina sem contato com o instrumento (α=5%). A análise estatística mostrou haver diferença significante entre os grupos. Canais instrumentados com o sistema endodôntico SAF apresentaram valores percentual de debris e superfície não tocada pelo instrumento menores (2,18 ± 2,71 e 12,33 ± 7,85 respectivamente) quando comparado com canais instrumentados com instrumentos rotatórios (13,11 ± 12,98 e 53,54 ± 15,95, respectivamente) (p<0.05). Concluiu-se que o sistema SAF proporcionou melhor preparo de canais radiculares por tocar mais nas paredes radiculares promovendo consequentemente melhor limpeza.Cleaning and shaping of root canals are essential steps for the success of endodontic therapy. The purpose of this study was to evaluate a new concept of endodontic instrument - the Self Adjusting File (SAF) system - and NiTi rotary instruments, regarding their cleaning capacity in flattened root canals, using optical microscopy. Twenty-two mandibular incisors prepared with K3 rotary instruments (n=11) and SAF system (n=11) had their apical thirds subjected to histological processing and analyzed by optical microscopy (40×). The images captured by Adobe Photoshop 5.1 software were analyzed with the integration grid of Image J software. The perimeter of action of the instruments on the root canals walls was determined using Image J software and a Bamboo digital tablet. Data were analyzed statistically using analysis of variance and unpaired t-test with Welchs correction, considering the presence of debris in the apical third and the root dentin surface untouched by the instrument (α=5%). The statistical analysis revealed significant difference between the groups. Canals prepared with the SAF system presented lower percent values of debris and untouched root dentin surfaces (2.18 ± 2.71 and 12.33 ± 7.85, respectively) compared with canals prepared with rotary instruments (13.11 ± 12.98 and 53.54 ± 15.95, respectively) (p<0.05). In conclusion, the SAF system was associated with better root canal preparation, as it touched more the root dentin walls and consequently promoted a more effective cleaning.
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Sousa, Vinicius Caixeta de. « Efeito antibacteriano dos sistemas Self-Ajusting File, XP-endo finisher e irrigação ultrassônica passiva sobre biofilme de Enterococcus faecalis ». Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/7290.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Abstract: Objective: To evaluate the effectiveness of complementary protocols of sanitization in the decontamination of infected root canals. Methods: Fifty uniradicular maxilary anterior human teeth were selected. The crowns were removed and the lengths standardized at 16 mm. The specimens were inoculated with Enterococcus faecalis and incubated at 37 °C for sixty days. Thirty teeth were performed with BioRace instruments until diameter corresponding to #60.02, and then complemented with Self-Adjusting File (SAF); XP-endo Finisher (XPF) and passive ultrasonic irrigation (PUI). Ten samples were used as positive control and 10 were not contaminated. Initial and final samples were collected and incubated at 37 °C for a period of 48 hours. The bacterial growth was analyzed in culture, determining the presence or absence of bacteria. The optical density of the culture medium was interpreted by UV spectrophotometry. The specimens were sectioned and prepared for evaluation in SEM. The images of the root surfaces were analyzed and classified by scores according to the presence of debris. The Kruskal-Wallis test was used for statistical analysis. The level of significance was 5%. Results: The mean optical density (μm) of the sanification protocols showed bacterial reduction in all groups. The experimental groups did not present statistically significant differences (p = 0.196). The analysis of SEM images revealed no significant difference (p = 0.414) between the scores of the groups. Conclusion: Complementary sanitization protocols reduced bacterial contamination.
Resumo: Objetivo: Avaliar a efetividade de protocolos complementares de sanificação na descontaminação de canais radiculares infectados. Materiais e métodos: Cinquenta dentes humanos anteriores superiores unirradiculares foram selecionados. As coroas foram removidas e os comprimentos padronizados em 16 mm. Os espécimes foram inoculados com Enterococcus faecalis e incubados a 37°C por sessenta dias. Trinta dentes foram preparados com instrumentos BioRace até alcançar o diâmetro correspondente ao #60.02, e a seguir complementados com Self-Adjusting File (SAF); XP-endo Finisher (XPF) e irrigação ultrassônica passiva (PUI). Dez amostras foram usadas como controle positivo e 10 não foram contaminadas. Amostras inicial e final foram coletadas e incubadas a 37°C por um período de 48 horas. O crescimento bacteriano foi analisado em cultura, determinando a presença ou ausência de bactérias. A densidade óptica do meio de cultura foi interpretada por espectrofotometria UV. Os espécimes foram seccionados e preparados para avaliação em MEV. A análise das imagens das superfícies radiculares foram analisadas e classificadas em scores de acordo com a presença de debris. O teste de Kruskal-Wallis foi utilizado para as análises estatísticas. O nível de significância foi 5%. Resultados: A média da densidade óptica (μm) dos protocolos de sanificação revelou redução bacteriana em todos os grupos. Os grupos experimentais não apresentaram diferenças estatisticamente significante (p=0,196). A análise das imagens de MEV revelou ausência de diferença significante (p=0,414) entre os scores dos grupos. Conclusão: Os protocolos complementares de sanificação favoreceu a redução da contaminação bacteriana.
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Ferraz, José Antonio Brufato. « Avaliação da limpeza das paredes em canais radiculares instrumentados pelas técnicas rotatória e self-adjusting file (SAF) associadas ao uso de diferentes quelantes ». Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/58/58133/tde-22052012-165946/.
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O presente trabalho avaliou, por microscopia eletrônica de varredura (MEV), a limpeza das paredes dos canais radiculares instrumentados pelas técnicas rotatória e Self-adjusting file (SAF®) com uso do NaOCl a 1% como solução irrigadora e o uso do EDTA a 15% e da Quitosana 0,20% como soluções quelantes, e quantificou os íons cálcio removidos pelas diferentes soluções irrigadoras por meio de espectrometria de absorção atômica. Trinta dentes caninos inferiores humanos foram divididos em dois grupos (n=15), de acordo com a técnica de instrumentação utilizada: A - instrumentos FlexMaster® usados na técnica Free Tip Preparation, assegurado alargamento mínimo de 200, até o instrumento # 60.02, irrigados com 1 mL de NaOCl 1% em cada troca de instrumento e B - sistema SAF®, com prévio alargamento manual até o instrumento K #20, aplicação da SAF® por 4 minutos, com fluxo de irrigação pelo sistema VATEA de 5mL/min. Os dentes foram divididos em três subgrupos conforme a irrigação final: G1-NaOCl 1%, G2- EDTA 15% e G3 Quitosana 0,20%. Utilizou-se 5mL de cada solução à 1mL/min. A solução extravasada pelo forame foi coletada e submetida à análise espectrométrica. O EDTA 15% apresentou maior capacidade de remoção de íons cálcio do que a Quitosana a 0,20% (p<0,05) e o NaOCl 1% não removeu íons. Os espécimes foram analisados em MEV. As fotomicrografias obtidas foram avaliadas qualitativamente em relação à remoção da camada de smear observada. Não houve diferença entre as instrumentações rotatória e SAF® nos terços dos canais avaliados. Analisadas as interações entre as técnicas utilizadas e aos terços do canal, o EDTA 15% apresentou melhores resultados que a Quitosana 0,20% (p<0,05), sendo ambas as soluções melhores que o NaOCl 1%. Conclui-se que as soluções quelantes testadas foram capazes de remover íons cálcio das paredes dos canais radiculares - com superioridade do EDTA 15% sobre a Quitosana 0,20%, e o NaOCl a 1% não apresentou essa capacidade - e removeram a camada de smear das paredes dos canais radiculares com superioridade do EDTA 15%, sem interferência das técnicas de instrumentação avaliadas rotatória e SAF®.The present study evaluated, by scanning electron microscopy (SEM), the cleanness of the root canal walls instrumented by rotary and the self-adjusting file (SAF®) techniques using 1% NaOCl as an irrigating solution and 15% EDTA, 0.20% Chitosan as chelator solutions, and quantified the calcium ions removed by the different irrigants with atomic absorption spectrometry. Thirty human mandibular canine teeth were divided into 2 groups (n=15) according to the instrumentation technique used: A- FlexMaster® instruments used with the Free tip Preparation, assuring a minimal enlargement of 200m, up to a #60 .02 instrument, irrigated with 1mL of 1% NaOCl between each instrument; and B- SAF® system, with previous enlargement to a type K #20 manual instrument, application of SAF during 4 minutes, with VATEA irrigation system at a flow of 5mL/min. The teeth were divided into three subgroups according to the final irrigation protocol: G1- 1% NaOCl, G2- 15% EDTA and G3- 0.20 % Chitosan. Five mL of solution were used at 1mL/min. The solution extruded thru the foramen was collected and submitted to spectrometric analysis. 15% EDTA showed higher calcium ion removal capacity then 0.20% Chitosan (p<0.05) and the 1% NaOCl did not remove ions. The specimens were evaluated by means of SEM. The photomicrographs obtained were qualitatively evaluated in terms of smear layer removal. There was no significant difference between the rotary and SAF® instrumentation systems in the evaluated canal thirds. The interaction techniques used and canals thirds showed that the 15% EDTA revealed better results than the 0.02% Chitosan (p<0.05), and both were better than 1% NaOCl. It can be concluded that the tested chelating solutions removed calcium ions from the root canals walls with better results for 15% EDTA than 0.20% Chitosan; 1% NaOCl did not present this capacity - and removed the smear layer form the root canal walls with better results for 15% EDTA, with no difference between the evaluated techniques rotary and SAF®.
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Wrastil, Tobias [Verfasser], Michael [Akademischer Betreuer] Hülsmann et Ralf [Akademischer Betreuer] Bürgers. « Vergleichende In-vitro-Studie zur maschinellen Wurzelkanalaufbereitung mit dem BioRaCe-System und dem Self-Adjusting-File-System / Tobias Wrastil. Gutachter : Michael Hülsmann ; Ralf Bürgers. Betreuer : Michael Hülsmann ». Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://d-nb.info/1044770457/34.
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Leonardo, Mario Francisco de Pasquali. « Efetividade de diferentes sistemas de preparo do canal radicular na eliminação de Enterococcus faecalis ». Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-14012013-125412/.
Texte intégralRésumé :
O objetivo deste estudo consiste em avaliar a efetividade de diferentes sistemas empregados no preparo biomecânico, dentre eles: Self-adjusting file (SAF), TiLOS Anatomic Endodontic Technology System (TiLOS) e Mtwo sobre a eliminação de Enterococcus faecalis cultivados em canais radiculares. Para isso, foram selecionados 47 prés-molares inferiores humanos, os quais foram contaminados por Enterococcus faecalis (ATCC 29212) durante 21 dias e divididos em três grupos: GI - SAF com irrigação contínua; GII - EndoEze Tilos e irrigação com auxílio de agulhas NaviTip; GIII - MTwo e irrigação com NaviTip a cada troca de instrumento. A irrigação foi realizada com solução de NaOCl a 2,5%. Coletas bacterianas foram realizadas em três tempos experimentais: coleta da contaminação (S1), posterior ao preparo dos canais radiculares (S2) e após sete dias do preparo biomecânico (S3). Os dados em UFC foram submetidos aos testes ANOVA e Tukey ou Kruskal-Wallis e Dunn com P<0.05. Na análise dos resultados, foi observada redução de E.faecalis após preparo (P < .05) em todos os grupos, sem diferença significante entre os grupos (P > .05). A coleta final demonstrou aumento bacteriano similar em todos os grupos, esclarecendo a viabilidade das bactérias incubadas. Dessa forma, conclui-se que o preparo dos canais radiculares realizado com SAF, EndoEze Tilos e Mtwo contribuem na desinfecção do canal radicular, sem, todavia, eliminar o E. faecalis do sistema de canais radiculares.The aim of this study was to evaluate the effectiveness of different chemo-mechanical systems for root canal preparation Self-adjusting File (SAF), TiLOS Anatomic Endodontic Technology System (TiLOS), and Mtwo against Enterococcus faecalis in the canal. Forty seven human mandibular bicuspids were contaminated with E. faecalis (ATCC 29212) for 21 days and divided into groups according to preparation methodÇ SAF group with continuous irrigationç TiLOS;Endo-Eze group and irrigation with a NaviTip needle Mtwo group and irrigation eith NaviTip. The irrigant used was 2.5% NaOCl. Bacterial harvests were performed after the contamination period (initial harvest), immediately post-preparation, and seven days after chemo-mechanical preparation. Data were expressed as CFU and subjected to ANOVA and Tukey or Kruskal-Wallis and Dunn tests at P < 0.05. Reduction in E.faecalis was observed after preparation (P< .05), with no significant differences between the groups (P> .05). The final harvest demonstrated statistically similar increase in the bacterial counts in all groups. Root canal preparation using SAF, TiLOS;Endo-Eze, and Mtwo systems contribute for the disinfection of the root
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Martins, Filipe Augusto Moreno Cornélio do Carmo. « Self Adjusting Files (SAF®) : perspetiva comparativa com o sistema ProTaper® ». Master's thesis, [s.n.], 2012. http://hdl.handle.net/10284/3430.
Texte intégralRésumé :
Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina DentáriaA Endodontia é uma área da Medicina Dentária que tem evoluído muito ao longo dos tempos. Surgiu no século XVII e desde aí, os conceitos, as técnicas e os materiais têm apresentado uma constante evolução e desenvolvimento. Alguns desses exemplos são as novas ligas metálicas que têm sido criadas e investigadas; os novos métodos de potenciação da irrigação; e as novas técnicas de obturação tridimensional que asseguram o correto selamento do sistema de canais radiculares. Existem diversos sistemas de instrumentação mecanizada de canais radiculares, sendo o sistema SAF® dos mais recentes. Este sistema apresenta as características de apenas ser necessária uma lima única para a instrumentação de todo o canal, sendo a parte ativa um tubo compressível: respeitar a morfologia canalar existente e apresentar irrigação contínua e simultânea durante a instrumentação. No que diz respeito ao sistema ProTaper®, é um sistema que apresenta limas de instrumentação do terço coronal e médio do canal radicular (shaping files) e limas de instrumentação do terço apical (finishing files). A presente tese com o título “Self Adjusting Files (SAF®): Perspectiva comparativa com o sistema ProTaper®”, tem como objetivo a elaboração de uma revisão bibliográfica com o intuito de comparar parâmetros específicos duma nova técnica de instrumentação canalar mecanizada (Self Adjusting Files®) como sistema de instrumentação mecanizada ProTaper®. A pesquisa foi realizada com base em artigos científicos e livros, sendo consultada a biblioteca da Faculdade de Ciências da Saúde da Universidade Fernando Pessoa, Faculdade de Medicina Dentária da Universidade do Porto. A pesquisa bibliográfica utilizou os motores de busca PubMed, Embase e Science Direct com as seguintes palavras-chave: “Self Adjusting File”, “ProTaper”, “Rotary System”, “Nickel Titanium”, “Endodontic irrigation”, “Endodontic obturation”. Os sistemas de instrumentação mecanizada SAF® e ProTaper® representam duas perspetivas de preparação canalar distintas: a primeira preconiza a adaptação da lima à anatomia tridimensional do canal radicular, enquanto a segunda preconiza uma preparação canalar com conicidade múltipla e progressiva. Endodontics is an area of dentistry that has evolved greatly over time. Emerged in the seventeenth century and since then, the concepts, techniques and materials showed a constant evolution and development. Some examples new alloys that have been created and investigated; new methods of enhancement of irrigation: and new tridimensional obturation techniques that ensure the sealing of the root canal system. There are multiple systems of root canal instrumentation, the SAF® system is an the most recent. This system presents a compressible tube in active part and single file use, respect of root canal morphology and preconize continuous and simultaneous irrigation during the instrumentation. The ProTaper® system presents files to coronal and middle third instrumentation (shaping files) and files to apical third instrumentation (finishing files). The purpose of this thesis titled “Self Adjusting Files (SAF®): Comparative perspective with the ProTaper® system” was the realization of a bibliographic rewiew in order to compare specific parameters of a new rotary instrumentation technique (Self Adjusting Files®)) with the ProTaper® rotary system. The research was realized based on scientific articles and books, consulted the Health Sciences Faculty of Fernando Pessoa University, Dentistry School of Oporto University. The bibliographic research used PubMed, Embase e Science Direct with the key-words: “Self Adjusting File”, “ProTaper”, “Rotary System”, “Nickel Titanium”, “Endodontic irrigation”, “Endodontic obturation”. The rotary instrumentation systems SAF® and ProTaper® represent a different perspectives of root canal instrumentation: SAF® advocates the adaptation of the file to the tridimensional anatomy of root canal and the second ProTaper® advocates the root canal instrumentation with multiple and progressive taper.
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César, Raquel Luísa Pereira. « Novos paradigmas de instrumentação endodôntica : self-adjusting file ». Master's thesis, 2018. http://hdl.handle.net/10284/7266.
Texte intégralRésumé :
A Endodontia é uma área da Medicina Dentária que tem evoluído muito ao
longo dos tempos. Surgiu no século XVII e desde aí, os conceitos, as técnicas e os
materiais tem apresentado numa constante evolução e desenvolvimento. Alguns desses
exemplos são as novas ligas metálicas usadas na confeção de instrumentos que tem sido
criadas e investigadas; os novos métodos de potenciação da irrigação; e as novas
técnicas de obturação tridimensional que asseguram o correto selamento do sistema de
canais radiculares.
Existem múltiplos sistemas de instrumentação mecanizada de canais radiculares,
um dos mais recentes são a Self-Adjusting File (SAF), que introduz uma nova era na
endodontia, ao realizar passos vitais de moldar e limpar simultaneamente os canais.
O objetivo desta revisão bibliográfica é dar a conhecer as limitações e vantagens
da lima SAF, ainda pouco conhecida e usual em Portugal.Endodontics is an area of dental medicine that has evolved a lot over time. It emerged in the seventeenth century and since then, the concepts, techniques and materials have presented a constant evolution and development. Some of these examples are the new metal alloys used in the confection of instruments that have been created and researched; the new methods of irrigation potentiation; and the new techniques of three-dimensional obturation that ensure correct sealing of the root canal system. There are multiple systems of mechanized root canal instrumentation, one of the most recent being the Self-Adjusting File (SAF), which introduces a new era in endodontics, by performing vital steps of simultaneously shaping and cleaning the channels. The purpose of this literature review is to make known the limitations and advantages of the SAF file, still little known and usual in Portugal.
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Vieira, Pedro Gaspar Andrade Martins Paiva. « Limas autoajustáveis : uma alternativa à instrumentação convencional ». Master's thesis, 2019. http://hdl.handle.net/10284/8834.
Texte intégralRésumé :
Existem inúmeros sistemas de instrumentação mecanizada, sendo que o sistema de limas autoajustável é um sistema inovador, que permite uma instrumentação e irrigação simultânea.
O objetivo desta revisão narrativa é analisar as características deste sistema, comparando-as com outros sistemas de instrumentação.
A metodologia consistiu numa pesquisa efetuada nas bases de dados “Pubmed”, “RCAAP”, “B-on”, “Repositório institucional da UFP” utilizando as palavras-chave: “Endodontic”, “Self adjusting file” e “SAF”.
Da análise realizada da literatura científica consultada, constata-se que é uma alternativa eficaz para a realização do tratamento endodôntico, demonstrando bons resultados quanto à limpeza dos canais radiculares, uma diminuta quantidade de detritos extruídos pelo forâmen apical e uma baixa incidência de formação de microcraks. No entanto, a maioria dos estudos são in vitro, com as limitações inerentes a este tipo de estudo, assim seriam necessários mais estudos clínicos e de longa duração de controlo.In a very wide range of mechanized instrumentation systems, the Self Adjusting File system is an innovative one that allows a simultaneous instrumentation and irrigation. The intention of the present narrative review is to analise the characteristics of this system, comparing it to other instrumentation systems. The methodology consisted in a research made in the databases of “Pubmed”, “RCAAP”, “B-on”, “Repositório institucional da UFP” using the keywords “Endodontic”, “Self adjusting file” and “SAF”. From the analysis of the consulted scientific literature, we determine that the SAF® is an efficient alternative to the endodontic treatment. It shows positive results when it comes to the root canal cleaning; a small amount of debris extruded through the apical foramen and a small occurence of microcracks formation. However, most of the studies are in vitro and with the limitations inherent to them, more clinical and long lasting control studies would be needed.
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Wrastil, Tobias. « Vergleichende In-vitro-Studie zur maschinellen Wurzelkanalaufbereitung mit dem BioRaCe-System und dem Self-Adjusting-File-System ». Doctoral thesis, 2013. http://hdl.handle.net/11858/00-1735-0000-0001-BBEE-D.
Texte intégral
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Kuo, Cheng-Tse, et 郭承擇. « Research on Correlation between Capillary Effect and Thin-Film Width of the Self-Adjusting Blade Coating Process and Feasibility of an Associated In-Line Thickness Measurement ». Thesis, 2013. http://ndltd.ncl.edu.tw/handle/29502405648654180336.
Texte intégralRésumé :
碩士國立中正大學
機械工程學系暨研究所
101
Thickness control of self-adjusting blade coating will face two issue. The first one is how to measure the thickness? And second one is what the correlation between capillary effect and film’s thickness? Issue 1: We develop an in-line sensor which can measure the thickness was added on self-adjusting blade coating machine. We test the machine to discuss the feasibility about thickness measurement. Finally, we confirm that the machine can detect thickness in micro scale. Issue 2: We used Surface Evolver to simulate the shape of liquid which in front of the blade. And then, constructing mathematical model to deduce the capillary force of the liquid which on the flow channel in a slit between blade and substrate. We also discuss about the influence of capillary effect with self-adjusting blade coating process. We find that if the substrate’s velocity is higher, the film’s width will not affect obviously by capillary effect. But if the substrate’s velocity is lower, we are not yet to draw conclusions.
Livres sur le sujet "Self-Adjusting File"
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Kutzler, Evan A. Living by Inches. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469653785.001.0001.
Texte intégralRésumé :
From battlefields, boxcars, and forgotten warehouses to notorious prison camps like Andersonville and Elmira, prisoners seemed to be everywhere during the American Civil War. Yet there is much we do not know about the soldiers and civilians whose very lives were in the hands of their enemies. Living by Inches is the first book to examine how imprisoned men in the Civil War perceived captivity through the basic building blocks of human experience--their five senses. From the first whiffs of a prison warehouse to the taste of cornbread and the feeling of lice, captivity assaulted prisoners' perceptions of their environments and themselves. Evan A. Kutzler demonstrates that the sensory experience of imprisonment produced an inner struggle for men who sought to preserve their bodies, their minds, and their sense of self as distinct from the fundamentally uncivilized and filthy environments surrounding them. From the mundane to the horrific, these men survived the daily experiences of captivity by adjusting to their circumstances, even if these transformations worried prisoners about what type of men they were becoming.
Chapitres de livres sur le sujet "Self-Adjusting File"
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Metzger, Zvi, et Anda Kfir. « Continuous Instrumentation and Irrigation : The Self-Adjusting File (SAF) System ». Dans Endodontic Irrigation, 199–220. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16456-4_11.
Texte intégral
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Nayak, Ankit, P. K. Kankar, Prashant K. Jain et Niharika Jain. « Fracture Prediction of the Self Adjusting File Using Force and Vibration Signature Analysis ». Dans Springer Proceedings in Physics, 643–49. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19894-7_49.
Texte intégral
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Zhao, Jiacheng, et Martina H. Stenzel. « Worm-Like Micelles and Vesicles : Adjusting the Morphology of Self-Assembled Fructose Based Block Copolymers by Fine-Tuning the Processing Parameters ». Dans ACS Symposium Series, 91–105. Washington, DC : American Chemical Society, 2015. http://dx.doi.org/10.1021/bk-2015-1188.ch007.
Texte intégral
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Joshi, Ashish. « Prevalence of Metabolic Syndrome in Subjects with Osteoarthritis Stratified by Age and Sex ». Dans Innovations in Data Methodologies and Computational Algorithms for Medical Applications, 60–72. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-0282-3.ch005.
Texte intégralRésumé :
The aim of the study was to determine association between osteoarthritis and metabolic syndrome stratified by age and gender categories. A final sample of 16,149 US residents aged 17 years or older was analyzed using the database National Health and Nutrition Examination Survey (NAHNES III). Variables assessed include age, gender, race, education, poverty income ratio, body mass index, smoking history, metabolic syndrome and its risk components. Continuous and categorical variables were compared in the 2 groups using T and chi-square statistics as appropriate. Multivariate analysis was performed after adjusting for the potential confounders. Five percent subjects self-reported of having osteoarthritis. The prevalence of metabolic syndrome in subjects with osteoarthritis was 40% compared to 21% with no osteoarthritis. Subjects with osteoarthritis were significantly older; were females, non-Hispanic whites, less educated and had high prevalence of diabetes, hypertension and high cholesterol. Age, being female, higher education, being non-Hispanic White, absence of osteoporosis, and body mass index were significant predictors of osteoarthritis. Metabolic syndrome was a risk factor for osteoarthritis in males.
Actes de conférences sur le sujet "Self-Adjusting File"
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Koosha, Rasool, et Luis San Andrés. « A Computational Model for the Analysis of the Static Forced Performance of Self-Equalizing Tilting Pad Thrust Bearings ». Dans ASME Turbo Expo 2020 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-16060.
Texte intégralRésumé :
Abstract While failure analyses in the archival literature report thrust collar misalignment as a major cause of collapse in oil lubricated thrust bearings, a self-equalizing tilting pad thrust bearing (TPTB) improves operation reliability by adjusting its pads to account for thrust collar tilt. The paper describes a kinematics model for the equalizing mechanism integrated into an existing thermo-elasto-hydrodynamic (TEHD) analysis tool to deliver load performance predictions for self-equalizing TPTBs. The analysis considers the actual leveling plates geometric model as obtained from a solids modeling commercial software and accounts for the sliding friction forces acting at the contact points of the leveling plates and the rolling friction at their pivots. Further, a Hertz contact analysis model uses the predicted forces to deliver a peak pressure and deformation over the contact area between the leveling plates. Next, the paper presents predictions for an example self-equalizing TPTB operating with a thrust collar static misalignment φ = 0.01°. The bearing 126 mm in outer diameter has six pads, operates at 4 krpm (26 m/s max. surface speed) and under a specific load/pad ranging from 0.5 to 3.5 MPa. Compared to a non-equalizing TPTB, a self-equalizing TPTB operates with up to 50% larger minimum film thickness and about ½ largest elastic deformation. Friction forces acting at the contact points of the leveling plates show a significant effect on the performance of the pad leveling system as they reduce the film clearance and increase a pad peak pressure. Predictions from the Hertz contact analysis agree with those from a commercial finite element analysis tool and show a significantly large peak pressure at the contact points of the leveling plates (> 0.9 GPa) when the bearing supports a 3 MPa/pad specific load. The paper stresses the importance of conducting a comprehensive multiple-pad analysis to accurately evaluate the performance and reliable operation of self-equalizing TPTBs.
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Anderson, Kurt S., et Mohammad Poursina. « Energy Concern in Biomolecular Simulations Involving Transitions From Coarse to Finer Grain Models ». Dans ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87297.
Texte intégralRésumé :
Generating self-adjusting multiscale models is necessary to analyze the complex behavior of biomolecular systems in an accurate, yet timely manner. The model transitions are achieved by effectively imposing or releasing certain systems constraints from a fine scale model to a reduced order model or vice versa. In the process of model reduction of such molecular systems, naturally existing higher modes are frozen out in the modeling because the internal metric had previously indicated these modes of motion as less relevant. In the transition from a coarse model back to a finer one, the appropriate amount of energy must be put back to the system. Herein, the non-uniqueness or even the presence of infinite number of solutions in this transition is addressed. Optimization and non-optimization methods are proposed to arrive at the finite number of solutions.
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Jakirlic´, Suad, Bjo¨rn Kniesner, Sanjin Sˇaric´ et Kemal Hanjalic´. « Merging Near-Wall RANS Models With LES for Separating and Reattaching Flows ». Dans ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98039.
Texte intégralRésumé :
A method of coupling a low-Reynolds-number k–ε RANS (Reynolds-Averaged Navier-Stokes) model with Large-Eddy Simulation (LES) in a two-layer Hybrid LES/RANS (HLR) scheme is proposed in the present work. The RANS model covers the near-wall region and the LES model the remainder of the flow domain. Two different subgrid-scale (SGS) models in LES were considered, the Smagorinsky model and the one-equation model for the residual kinetic energy (Yoshizawa and Horiuti, 1985), combined with two versions of the RANS ε equation, one governing the “isotropic” (ε˜; Chien, 1982) and the other the “homogeneous” dissipation rate (εh; Jakirlic and Hanjalic, 2002). Both fixed and self-adjusting interface locations were considered. The exchange of the variables across the interface was adjusted by smoothing the turbulence viscosity either by adjusting the RANS model parameters, such as Cμ (Temmerman et al., 2005), or by applying an additional forcing at the interface using a method of digital-filter-based generation of inflow data for spatially developing DNS and LES due to Klein et al. (2003). The feasibility of the method was illustrated against the available DNS, fine- and coarse grid LES, DES (Detached Eddy Simulation) and experiments in turbulent flow over a backward-facing step at a low (Yoshioka et al., 2001) and a high Re number (Vogel and Eaton, 1985), periodic flow over a series of 2-D hills (Fro¨hlich et al., 2005) and in a high-Re flow over a 2-D, wall-mounted hump (Greenblat et al, 2004). Prior to these computations, the method was validated in a fully-developed channel flow at a moderate Reynolds number Rem ≈ 24000 (Abe et al., 2004).