Evaluation of the behavior of different brackets on frictional forces during sliding mechanics

Detalhes bibliográficos
Autor(a) principal: Cavaleiro, João
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/36695
Resumo: Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina apresentado à Faculdade de Medicina da Universidade de Coimbra.
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spelling Evaluation of the behavior of different brackets on frictional forces during sliding mechanicsFrictionBracketLigationBindingSurface roughnessTrabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina apresentado à Faculdade de Medicina da Universidade de Coimbra.Objective: The purpose of this study is to compare, in vitro, the resistance to sliding generated by conventional, active self-ligating and passive self-ligating brackets with stainless steel and nickel-titanium wires and to evaluate the effect of binding upon resistance to sliding In addition to this, the influence of bracket´s slot surface characteristics on measured friction was estimated. Materials and Methods: The following 0,022 inch slot brackets were essayed: Damon® Q™, Prodigy SL™ (Sybron Dental Specialties Ormco™, Orange, California, USA), Smart-Clip™SL3, Victory Series™ (3M Unitek Orthodontic Products, Monrovia, California, USA), Morelli® Roth Standard and Morelli® Roth SLI (Morelli Ortodontia, Sorocaba, São Paulo, Brazil). These brackets were coupled with either 0.016 x 0.022 inch stainless steel (Dentaurum GmbH, Ispringen, Germany) or nickel-titanium (DM Ceosa, Madrid, Spain) archwires. Alicona InfiniteFocus® optical 3-dimensional micro coordinate system (Alicona Imaging GmbH, Grambach/Graz, Austria) and Alicona IFM version 3.5.1.5 software (Alicona Imaging GmbH, Grambach/Graz, Austria) were used for assessing roughness average, root mean square and mean peak to valley height of roughness profile of slot surface. For Damon brackets, a slot profile analysis was executed in order to evaluate the contact areas between bracket and archwire Results: Statistically significant higher resistance to sliding is observed in conventional brackets comparing to passive and active self-ligating brackets. No statistically significant differences were found between passive and active self-ligating brackets and between archwire materials in 0 degrees angulations. For 5 degrees angulations, stainless steel showed statistically significant higher resistance to sliding. No statistically significant differences in resistance to sliding were found between 0 and 5 degrees of bracket tipping. Higher values of roughness average and root mean square were correlated with friction forces lower than 3N while lower roughness values were associated with higher frictional forces. In Damon brackets, the embossed numbers in the slot are not likely to contact with the archwire since they are approximately 5.5μm lower than the lateral boxes. Conclusion: Self-ligating brackets are helpful for obtaining low frictional forces. When coupled with a small rectangular archwire, slight bracket angulations or tooth tipping may not influence resistance to sliding. However, different alloys reveal dissimilar frictional behavior when angulations are present. Surface roughness seems to have an inverse correlation with frictional forces.2013-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/10316/36695http://hdl.handle.net/10316/36695engCavaleiro, Joãoinfo: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:RCAAP2022-01-20T17:48:44Zoai:estudogeral.uc.pt:10316/36695Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:44:12.890422Repositório 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 Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
title Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
spellingShingle Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
Cavaleiro, João
Friction
Bracket
Ligation
Binding
Surface roughness
title_short Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
title_full Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
title_fullStr Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
title_full_unstemmed Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
title_sort Evaluation of the behavior of different brackets on frictional forces during sliding mechanics
author Cavaleiro, João
author_facet Cavaleiro, João
author_role author
dc.contributor.author.fl_str_mv Cavaleiro, João
dc.subject.por.fl_str_mv Friction
Bracket
Ligation
Binding
Surface roughness
topic Friction
Bracket
Ligation
Binding
Surface roughness
description Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina apresentado à Faculdade de Medicina da Universidade de Coimbra.
publishDate 2013
dc.date.none.fl_str_mv 2013-06
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/36695
http://hdl.handle.net/10316/36695
url http://hdl.handle.net/10316/36695
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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