Fatigue life of protaper gold RM instruments: an in vitro study

Detalhes bibliográficos
Autor(a) principal: Pereira, Fátima Carolina Ferreira
Data de Publicação: 2015
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/25512
Resumo: Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2015
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spelling Fatigue life of protaper gold RM instruments: an in vitro studyMedicina dentáriaEndodontiaTeses de mestrado - 2015Domínio/Área Científica::Ciências Médicas::Medicina ClínicaTese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2015Introduction: Nickel-titanium instruments were introduced to facilitate canal preparation. Despite its advantages, instrument separation remains a major concern in endodontics due to several factors. There are many systems of endodontic files and the purpose of this study was to characterize the cyclic fatigue of ProTaper GoldRM (PTG) instruments and compare it to Protaper® Universal (PTU) and other rotary systems. Materials and Methods: Forty-eight rotary nickel-titanium files of PTG and PTU systems were analyzed in this study. Those were divided into four experimental groups, according to type of system and instrument (PTG F2, PTG F2, PTG F3, PTU F2 and PTU F3). A mechanical device was used to simulate the root canal system with a radius of curvature of 4, 7 mm and an angle of curvature of 45˚. Each instrument was submitted to testing with rotational speed of 300 rpm and a torque of 4 N. cm. Testing time was registered when tip separation occurred. Data obtained such as time to fracture of the instrument tested and number of cycles to fracture (NCF) was statically analyzed by t-student test. For fracture length the non-parametric U-Whitman test was used. PTG and ProTaper NextTM (PTN) data from Vaz 2014 study were analyzed with the same tests. Significance was set at 95% confidence level. Results: PTG F2 instrument proved to be statistically more resistant to cyclic fatigue than instruments PTG F3, PTU F2 and PTN X2. Discussion and Conclusions: Compared with different rotary systems such as PTU and PTN, this system suggests being more resistant to cyclic fatigue. During clinical practice, clinicians should be aware of the mechanical properties of the instruments chosen and take into account the higher resistance to cyclic fatigue of ProTaper GoldRM files when compared to other systems.Ginjeira, António Manuel Pinto 1958-Martins, RuiRepositório da Universidade de LisboaPereira, Fátima Carolina Ferreira2016-12-29T10:56:00Z201520152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/25512TID:201273926enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T16:14:59Zoai:repositorio.ul.pt:10451/25512Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:42:22.227248Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Fatigue life of protaper gold RM instruments: an in vitro study
title Fatigue life of protaper gold RM instruments: an in vitro study
spellingShingle Fatigue life of protaper gold RM instruments: an in vitro study
Pereira, Fátima Carolina Ferreira
Medicina dentária
Endodontia
Teses de mestrado - 2015
Domínio/Área Científica::Ciências Médicas::Medicina Clínica
title_short Fatigue life of protaper gold RM instruments: an in vitro study
title_full Fatigue life of protaper gold RM instruments: an in vitro study
title_fullStr Fatigue life of protaper gold RM instruments: an in vitro study
title_full_unstemmed Fatigue life of protaper gold RM instruments: an in vitro study
title_sort Fatigue life of protaper gold RM instruments: an in vitro study
author Pereira, Fátima Carolina Ferreira
author_facet Pereira, Fátima Carolina Ferreira
author_role author
dc.contributor.none.fl_str_mv Ginjeira, António Manuel Pinto 1958-
Martins, Rui
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Pereira, Fátima Carolina Ferreira
dc.subject.por.fl_str_mv Medicina dentária
Endodontia
Teses de mestrado - 2015
Domínio/Área Científica::Ciências Médicas::Medicina Clínica
topic Medicina dentária
Endodontia
Teses de mestrado - 2015
Domínio/Área Científica::Ciências Médicas::Medicina Clínica
description Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2015
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015-01-01T00:00:00Z
2016-12-29T10:56:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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TID:201273926
url http://hdl.handle.net/10451/25512
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dc.language.iso.fl_str_mv eng
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instacron:RCAAP
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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