Polytetrafluorethylene added to acrylic resins: mechanical properties

Detalhes bibliográficos
Autor(a) principal: Straioto,Fabiana Gouveia
Data de Publicação: 2010
Outros Autores: Ricomini Filho,Antonio Pedro, Fernandes Neto,Alfredo Júlio, Del Bel Cury,Altair Antoninha
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Dental Journal
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100009
Resumo: The addition of different polymers, such as polytetrafluorethylene (PTFE), to denture base resins could be an option to modify acrylic resin mechanical properties. This study evaluated the surface hardness, impact and flexural strength, flexural modulus and peak load of 2 acrylic resins, one subjected to a long and another subjected to a short polymerization cycle, which were prepared with or without the addition of 2% PTFE. Four groups were formed according to the polymerization cycle and addition or not of PTFE. Forty specimens were prepared for each test (10 per group) with the following dimensions: hardness (30 mm diameter x 5 mm thick), impact strength (50 x 6 x 4 mm) and flexural strength (64 x 10 x 3.3 mm) test. The results of the flexural strength test allowed calculating flexural modulus and peak of load values. All tests were performed in accordance with the ISO 1567:1999 standard. Data were analyzed statistically by ANOVA and Tukey's test with the level of significance set at 5%. No statistically significant differences (p>0.05) were found for surface hardness. Flexural strength, impact strength and peak load were significantly higher (p<0.05) for resins without added PTFE. The flexural modulus of the acrylic resin with incorporated 2% PTFE polymerized by long cycle was significantly higher (p<0.05) than that of the other resins. Within the limits of this study, it may be concluded that the addition of PTFE did not improve the mechanical properties of the evaluated acrylic resins.
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spelling Polytetrafluorethylene added to acrylic resins: mechanical propertiesacrylic resinpolytetrafluoroethylenesurface hardnessimpact strength and flexural strengthThe addition of different polymers, such as polytetrafluorethylene (PTFE), to denture base resins could be an option to modify acrylic resin mechanical properties. This study evaluated the surface hardness, impact and flexural strength, flexural modulus and peak load of 2 acrylic resins, one subjected to a long and another subjected to a short polymerization cycle, which were prepared with or without the addition of 2% PTFE. Four groups were formed according to the polymerization cycle and addition or not of PTFE. Forty specimens were prepared for each test (10 per group) with the following dimensions: hardness (30 mm diameter x 5 mm thick), impact strength (50 x 6 x 4 mm) and flexural strength (64 x 10 x 3.3 mm) test. The results of the flexural strength test allowed calculating flexural modulus and peak of load values. All tests were performed in accordance with the ISO 1567:1999 standard. Data were analyzed statistically by ANOVA and Tukey's test with the level of significance set at 5%. No statistically significant differences (p>0.05) were found for surface hardness. Flexural strength, impact strength and peak load were significantly higher (p<0.05) for resins without added PTFE. The flexural modulus of the acrylic resin with incorporated 2% PTFE polymerized by long cycle was significantly higher (p<0.05) than that of the other resins. Within the limits of this study, it may be concluded that the addition of PTFE did not improve the mechanical properties of the evaluated acrylic resins.Fundação Odontológica de Ribeirão Preto2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100009Brazilian Dental Journal v.21 n.1 2010reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/S0103-64402010000100009info:eu-repo/semantics/openAccessStraioto,Fabiana GouveiaRicomini Filho,Antonio PedroFernandes Neto,Alfredo JúlioDel Bel Cury,Altair Antoninhaeng2010-05-04T00:00:00Zoai:scielo:S0103-64402010000100009Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2010-05-04T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false
dc.title.none.fl_str_mv Polytetrafluorethylene added to acrylic resins: mechanical properties
title Polytetrafluorethylene added to acrylic resins: mechanical properties
spellingShingle Polytetrafluorethylene added to acrylic resins: mechanical properties
Straioto,Fabiana Gouveia
acrylic resin
polytetrafluoroethylene
surface hardness
impact strength and flexural strength
title_short Polytetrafluorethylene added to acrylic resins: mechanical properties
title_full Polytetrafluorethylene added to acrylic resins: mechanical properties
title_fullStr Polytetrafluorethylene added to acrylic resins: mechanical properties
title_full_unstemmed Polytetrafluorethylene added to acrylic resins: mechanical properties
title_sort Polytetrafluorethylene added to acrylic resins: mechanical properties
author Straioto,Fabiana Gouveia
author_facet Straioto,Fabiana Gouveia
Ricomini Filho,Antonio Pedro
Fernandes Neto,Alfredo Júlio
Del Bel Cury,Altair Antoninha
author_role author
author2 Ricomini Filho,Antonio Pedro
Fernandes Neto,Alfredo Júlio
Del Bel Cury,Altair Antoninha
author2_role author
author
author
dc.contributor.author.fl_str_mv Straioto,Fabiana Gouveia
Ricomini Filho,Antonio Pedro
Fernandes Neto,Alfredo Júlio
Del Bel Cury,Altair Antoninha
dc.subject.por.fl_str_mv acrylic resin
polytetrafluoroethylene
surface hardness
impact strength and flexural strength
topic acrylic resin
polytetrafluoroethylene
surface hardness
impact strength and flexural strength
description The addition of different polymers, such as polytetrafluorethylene (PTFE), to denture base resins could be an option to modify acrylic resin mechanical properties. This study evaluated the surface hardness, impact and flexural strength, flexural modulus and peak load of 2 acrylic resins, one subjected to a long and another subjected to a short polymerization cycle, which were prepared with or without the addition of 2% PTFE. Four groups were formed according to the polymerization cycle and addition or not of PTFE. Forty specimens were prepared for each test (10 per group) with the following dimensions: hardness (30 mm diameter x 5 mm thick), impact strength (50 x 6 x 4 mm) and flexural strength (64 x 10 x 3.3 mm) test. The results of the flexural strength test allowed calculating flexural modulus and peak of load values. All tests were performed in accordance with the ISO 1567:1999 standard. Data were analyzed statistically by ANOVA and Tukey's test with the level of significance set at 5%. No statistically significant differences (p>0.05) were found for surface hardness. Flexural strength, impact strength and peak load were significantly higher (p<0.05) for resins without added PTFE. The flexural modulus of the acrylic resin with incorporated 2% PTFE polymerized by long cycle was significantly higher (p<0.05) than that of the other resins. Within the limits of this study, it may be concluded that the addition of PTFE did not improve the mechanical properties of the evaluated acrylic resins.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000100009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-64402010000100009
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Fundação Odontológica de Ribeirão Preto
publisher.none.fl_str_mv Fundação Odontológica de Ribeirão Preto
dc.source.none.fl_str_mv Brazilian Dental Journal v.21 n.1 2010
reponame:Brazilian Dental Journal
instname:Fundação Odontológica de Ribeirão Preto (FUNORP)
instacron:FUNORP
instname_str Fundação Odontológica de Ribeirão Preto (FUNORP)
instacron_str FUNORP
institution FUNORP
reponame_str Brazilian Dental Journal
collection Brazilian Dental Journal
repository.name.fl_str_mv Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)
repository.mail.fl_str_mv bdj@forp.usp.br||sergio@fosjc.unesp.br
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