Avaliação do coeficiente de atrito de braquetes metálicos e estéticos com fios de aço inoxidável e beta-titânio
Autor(a) principal: | |
---|---|
Data de Publicação: | 2004 |
Outros Autores: | , , |
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. |
id |
UNSP_26f295a96cd55f18fa42243c1d80e37c |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/211660 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
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) |
repository.mail.fl_str_mv |
|
_version_ |
1808129308733997056 |