Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio

Detalhes bibliográficos
Autor(a) principal: Braga, Cristine Pritsch
Data de Publicação: 2004
Outros Autores: Vanzin, Guilherme Drumond, Marchioro, Ernani Menezes [UNESP], Beck, João Carlos P.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S1415-54192004000600011
http://hdl.handle.net/11449/211660
Resumo: An important factor that defines the effectiveness of the appliances is the friction between the surfaces of wires and brackets. Thus, that study was developed in order to investigate the static friction coefficient between stainless steel and beta-titanium wires (TP Orthodontics) and the stainless steel brackets (Dynalock® - Unitek), esthetic brackets with a stainless steel slot (Clarity® - Unitek) and conventional esthetic brackets (Allure® - GAC). For this purpose, an equipment was built in the Department of Mechanical Engineering and Mechatronics at PUCRS. It should be stressed that before the tests began, the Method Error was quantified and it was found that there was no significant interference (p>0,05) by the factor operating in the measurements. From then, the friction coefficient could be calculated, obtained by dividing friction force by the normal load. The statistic method used in these study was Analysis of Variance (ANOVA) and Multiple Comparison test (Tukey). It was found that: 1) the combination with the lowest friction coefficient was constituted by the stainless steel wire against the Dynalock® bracket, and the one with the highest friction coefficient was that of the Allure® bracket with the beta-titanium wire; 2) the beta-titanium wire presented a friction coefficient that was significantly higher than the stainless steel wire; 3) the Dynalock® bracket did not present any significant differences in relation to the friction coefficient of the Clarity® bracket when the wire used was of beta-titanium. However, when the wire tested was of stainless steel, the Dynalock® bracket presented a significantly lower friction coefficient. The Clarity® bracket presented a significantly lower friction coefficient than the Allure® bracket.
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spelling Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânioEvaluation of the friction coefficient of metal and esthetic brackets with stainless steel and beta-titanium wiresFrictionBracketsOrthodontic wiresAtritoBraquetesFios ortodônticosAn important factor that defines the effectiveness of the appliances is the friction between the surfaces of wires and brackets. Thus, that study was developed in order to investigate the static friction coefficient between stainless steel and beta-titanium wires (TP Orthodontics) and the stainless steel brackets (Dynalock® - Unitek), esthetic brackets with a stainless steel slot (Clarity® - Unitek) and conventional esthetic brackets (Allure® - GAC). For this purpose, an equipment was built in the Department of Mechanical Engineering and Mechatronics at PUCRS. It should be stressed that before the tests began, the Method Error was quantified and it was found that there was no significant interference (p>0,05) by the factor operating in the measurements. From then, the friction coefficient could be calculated, obtained by dividing friction force by the normal load. The statistic method used in these study was Analysis of Variance (ANOVA) and Multiple Comparison test (Tukey). It was found that: 1) the combination with the lowest friction coefficient was constituted by the stainless steel wire against the Dynalock® bracket, and the one with the highest friction coefficient was that of the Allure® bracket with the beta-titanium wire; 2) the beta-titanium wire presented a friction coefficient that was significantly higher than the stainless steel wire; 3) the Dynalock® bracket did not present any significant differences in relation to the friction coefficient of the Clarity® bracket when the wire used was of beta-titanium. However, when the wire tested was of stainless steel, the Dynalock® bracket presented a significantly lower friction coefficient. The Clarity® bracket presented a significantly lower friction coefficient than the Allure® bracket.Um fator importante que define a eficácia dos aparelhos ortodônticos fixos é o atrito existente entre as superfícies de fios e braquetes. Assim, este estudo teve como objetivo investigar o coeficiente de atrito estático entre fios de aço inoxidável e beta-titânio (TP Orthodontics) e braquetes de aço inoxidável (Dynalock® - Unitek), braquetes estéticos com slot de aço inoxidável (Clarity® - Unitek) e estéticos convencionais (Allure® - GAC). Para tanto, construiu-se um equipamento no Departamento de Engenharia Mecânica e Mecatrônica da PUCRS. Antes de serem iniciados os testes, foi quantificado o erro de método e constatou-se que não houve interferência significante (p>0,05) do fator operador nas medições. Então, pôde-se calcular o valor do coeficiente de atrito, obtido pela divisão da força de atrito pela carga normal. O método estatístico utilizado neste estudo foi Análise de Variância (ANOVA) e teste de Comparações Múltiplas (Tukey). Constatou-se que: 1) a combinação com menor coeficiente de atrito foi composta pelo fio de aço inoxidável e braquete Dynalock® e a que apresentou maior coeficiente foi a do braquete Allure® com o fio de beta-titânio; 2) o fio de beta-titânio apresentou coeficiente de atrito significativamente maior do que o fio de aço inoxidável; 3) o braquete Dynalock® não apresentou diferenças significativas em relação ao coeficiente de atrito do braquete Clarity® quando o fio utilizado foi de beta-titânio. No entanto, quando o fio testado foi de aço inoxidável, apresentou coeficiente de atrito significativamente menor. O braquete Clarity® apresentou coeficiente de atrito significativamente menor do que o braquete Allure®.Universidade Estadual PaulistaPontifícia Universidade Católica do Rio Grande do SulUniversidade Federal do Rio de JaneiroUniversidade Estadual PaulistaDental Press EditoraUniversidade Estadual Paulista (Unesp)Pontifícia Universidade Católica do Rio Grande do SulUniversidade Federal do Rio de JaneiroBraga, Cristine PritschVanzin, Guilherme DrumondMarchioro, Ernani Menezes [UNESP]Beck, João Carlos P.2021-07-14T10:27:38Z2021-07-14T10:27:38Z2004-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article70-83application/pdfhttp://dx.doi.org/10.1590/S1415-54192004000600011Revista Dental Press de Ortodontia e Ortopedia Facial. Maringá, PR, Brazil: Dental Press Editora, v. 9, n. 6, p. 70-83, 2004.1980-5500http://hdl.handle.net/11449/21166010.1590/S1415-54192004000600011S1415-54192004000600011S1415-54192004000600011.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Dental Press de Ortodontia e Ortopedia Facialinfo:eu-repo/semantics/openAccess2023-12-26T06:15:09Zoai:repositorio.unesp.br:11449/211660Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:19:12.948590Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
Evaluation of the friction coefficient of metal and esthetic brackets with stainless steel and beta-titanium wires
title Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
spellingShingle Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
Braga, Cristine Pritsch
Friction
Brackets
Orthodontic wires
Atrito
Braquetes
Fios ortodônticos
title_short Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
title_full Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
title_fullStr Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
title_full_unstemmed Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
title_sort Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
author Braga, Cristine Pritsch
author_facet Braga, Cristine Pritsch
Vanzin, Guilherme Drumond
Marchioro, Ernani Menezes [UNESP]
Beck, João Carlos P.
author_role author
author2 Vanzin, Guilherme Drumond
Marchioro, Ernani Menezes [UNESP]
Beck, João Carlos P.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Pontifícia Universidade Católica do Rio Grande do Sul
Universidade Federal do Rio de Janeiro
dc.contributor.author.fl_str_mv Braga, Cristine Pritsch
Vanzin, Guilherme Drumond
Marchioro, Ernani Menezes [UNESP]
Beck, João Carlos P.
dc.subject.por.fl_str_mv Friction
Brackets
Orthodontic wires
Atrito
Braquetes
Fios ortodônticos
topic Friction
Brackets
Orthodontic wires
Atrito
Braquetes
Fios ortodônticos
description An important factor that defines the effectiveness of the appliances is the friction between the surfaces of wires and brackets. Thus, that study was developed in order to investigate the static friction coefficient between stainless steel and beta-titanium wires (TP Orthodontics) and the stainless steel brackets (Dynalock® - Unitek), esthetic brackets with a stainless steel slot (Clarity® - Unitek) and conventional esthetic brackets (Allure® - GAC). For this purpose, an equipment was built in the Department of Mechanical Engineering and Mechatronics at PUCRS. It should be stressed that before the tests began, the Method Error was quantified and it was found that there was no significant interference (p>0,05) by the factor operating in the measurements. From then, the friction coefficient could be calculated, obtained by dividing friction force by the normal load. The statistic method used in these study was Analysis of Variance (ANOVA) and Multiple Comparison test (Tukey). It was found that: 1) the combination with the lowest friction coefficient was constituted by the stainless steel wire against the Dynalock® bracket, and the one with the highest friction coefficient was that of the Allure® bracket with the beta-titanium wire; 2) the beta-titanium wire presented a friction coefficient that was significantly higher than the stainless steel wire; 3) the Dynalock® bracket did not present any significant differences in relation to the friction coefficient of the Clarity® bracket when the wire used was of beta-titanium. However, when the wire tested was of stainless steel, the Dynalock® bracket presented a significantly lower friction coefficient. The Clarity® bracket presented a significantly lower friction coefficient than the Allure® bracket.
publishDate 2004
dc.date.none.fl_str_mv 2004-12
2021-07-14T10:27:38Z
2021-07-14T10:27:38Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/S1415-54192004000600011
Revista Dental Press de Ortodontia e Ortopedia Facial. Maringá, PR, Brazil: Dental Press Editora, v. 9, n. 6, p. 70-83, 2004.
1980-5500
http://hdl.handle.net/11449/211660
10.1590/S1415-54192004000600011
S1415-54192004000600011
S1415-54192004000600011.pdf
url http://dx.doi.org/10.1590/S1415-54192004000600011
http://hdl.handle.net/11449/211660
identifier_str_mv Revista Dental Press de Ortodontia e Ortopedia Facial. Maringá, PR, Brazil: Dental Press Editora, v. 9, n. 6, p. 70-83, 2004.
1980-5500
10.1590/S1415-54192004000600011
S1415-54192004000600011
S1415-54192004000600011.pdf
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Revista Dental Press de Ortodontia e Ortopedia Facial
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 70-83
application/pdf
dc.publisher.none.fl_str_mv Dental Press Editora
publisher.none.fl_str_mv Dental Press Editora
dc.source.none.fl_str_mv SciELO
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
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