Hardness of denture base and hard chair-side reline acrylic resins

Detalhes bibliográficos
Autor(a) principal: Azevedo, Andrea
Data de Publicação: 2005
Outros Autores: Machado, Ana Lucia, Vergani, Carlos Eduardo, Giampaolo, Eunice Teresinha, Pavarina, Ana Cláudia
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of applied oral science (Online)
Texto Completo: https://www.revistas.usp.br/jaos/article/view/3295
Resumo: INTRODUCTION: The hardness of denture base materials may undergo changes due to continued polymerization reaction and water uptake. However, the extent to which these processes affect the hardness of materials is still unclear. OBJECTIVE: In this study, the degree of conversion of two hard chair-side reline resins (Duraliner II-D and Kooliner-K) and one heat-cured acrylic resin (Lucitone 550-L) was evaluated indirectly by measuring the surface hardness. The effect of immersion in water on this property was also analyzed. MATERIALS AND METHODS: After processing following the manufacturers' instructions, specimens (5mm diameter and 2mm thickness) were dry stored at room temperature and the Vickers hardness (VHN) was measured with a hardness tester after 0, 2, 7, 30 and 90 days. Specimens were then immersed in water at 37ºC and hardness was evaluated after the same time intervals. Five specimens were prepared for each material. Data were analyzed by Kruskal-Wallis test (P=.01). RESULTS: When dry stored, material L showed an increase in hardness (P;.01). After 2-day water storage, all materials showed a significant reduction in hardness (P
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spelling Hardness of denture base and hard chair-side reline acrylic resins Dureza de resinas acrílicas para base de prótese e reembasamento imediato Bases de prótesesResinas acrílicasDurezaDenture basesAcrylic resinsHardness INTRODUCTION: The hardness of denture base materials may undergo changes due to continued polymerization reaction and water uptake. However, the extent to which these processes affect the hardness of materials is still unclear. OBJECTIVE: In this study, the degree of conversion of two hard chair-side reline resins (Duraliner II-D and Kooliner-K) and one heat-cured acrylic resin (Lucitone 550-L) was evaluated indirectly by measuring the surface hardness. The effect of immersion in water on this property was also analyzed. MATERIALS AND METHODS: After processing following the manufacturers' instructions, specimens (5mm diameter and 2mm thickness) were dry stored at room temperature and the Vickers hardness (VHN) was measured with a hardness tester after 0, 2, 7, 30 and 90 days. Specimens were then immersed in water at 37ºC and hardness was evaluated after the same time intervals. Five specimens were prepared for each material. Data were analyzed by Kruskal-Wallis test (P=.01). RESULTS: When dry stored, material L showed an increase in hardness (P;.01). After 2-day water storage, all materials showed a significant reduction in hardness (P INTRODUÇÃO: A dureza das resinas para base de prótese e para reembasamento imediato pode apresentar alterações devido à polimerização continuada e absorção de água. Entretanto, a magnitude do efeito de cada um desses processos ainda não foi definida. OBJETIVO: Neste estudo, o grau de conversão de duas resinas autopolimerizáveis para reembasamento (Duraliner II-D and Kooliner-K) e de uma resina termopolimerizável para base de prótese (Lucitone 550-L) foi avaliado, indiretamente, por meio da mensuração da dureza. O efeito da imersão em água sobre essa propriedade também foi analisado. MATERIAL E MÉTODOS: Após a polimerização, amostras (diâmetro - 5 mm; espessura - 2 mm) foram armazenadas a seco em temperatura ambiente e a dureza Vickers (VHN) foi mensurada após 0, 2, 7, 30 e 90 dias. As amostras foram, então, imersas em água a 37º C e a dureza foi avaliada nos períodos citados. Cinco amostras foram preparadas para cada material. Os resultados foram analisados utilizando-se o teste de Kruskal-Wallis (P=.01). RESULTADOS: Para o armazenamento a seco, o material L apresentou aumento significativo na dureza (P;.01). Após 2 dias de armazenamento em água, todos os materiais apresentaram redução significativa na dureza (PUniversidade de São Paulo. Faculdade de Odontologia de Bauru2005-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/329510.1590/S1678-77572005000300017Journal of Applied Oral Science; Vol. 13 No. 3 (2005); 291-295 Journal of Applied Oral Science; Vol. 13 Núm. 3 (2005); 291-295 Journal of Applied Oral Science; v. 13 n. 3 (2005); 291-295 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3295/3985Copyright (c) 2005 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessAzevedo, AndreaMachado, Ana LuciaVergani, Carlos EduardoGiampaolo, Eunice TeresinhaPavarina, Ana Cláudia2012-04-27T11:51:17Zoai:revistas.usp.br:article/3295Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:51:17Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Hardness of denture base and hard chair-side reline acrylic resins
Dureza de resinas acrílicas para base de prótese e reembasamento imediato
title Hardness of denture base and hard chair-side reline acrylic resins
spellingShingle Hardness of denture base and hard chair-side reline acrylic resins
Azevedo, Andrea
Bases de próteses
Resinas acrílicas
Dureza
Denture bases
Acrylic resins
Hardness
title_short Hardness of denture base and hard chair-side reline acrylic resins
title_full Hardness of denture base and hard chair-side reline acrylic resins
title_fullStr Hardness of denture base and hard chair-side reline acrylic resins
title_full_unstemmed Hardness of denture base and hard chair-side reline acrylic resins
title_sort Hardness of denture base and hard chair-side reline acrylic resins
author Azevedo, Andrea
author_facet Azevedo, Andrea
Machado, Ana Lucia
Vergani, Carlos Eduardo
Giampaolo, Eunice Teresinha
Pavarina, Ana Cláudia
author_role author
author2 Machado, Ana Lucia
Vergani, Carlos Eduardo
Giampaolo, Eunice Teresinha
Pavarina, Ana Cláudia
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Azevedo, Andrea
Machado, Ana Lucia
Vergani, Carlos Eduardo
Giampaolo, Eunice Teresinha
Pavarina, Ana Cláudia
dc.subject.por.fl_str_mv Bases de próteses
Resinas acrílicas
Dureza
Denture bases
Acrylic resins
Hardness
topic Bases de próteses
Resinas acrílicas
Dureza
Denture bases
Acrylic resins
Hardness
description INTRODUCTION: The hardness of denture base materials may undergo changes due to continued polymerization reaction and water uptake. However, the extent to which these processes affect the hardness of materials is still unclear. OBJECTIVE: In this study, the degree of conversion of two hard chair-side reline resins (Duraliner II-D and Kooliner-K) and one heat-cured acrylic resin (Lucitone 550-L) was evaluated indirectly by measuring the surface hardness. The effect of immersion in water on this property was also analyzed. MATERIALS AND METHODS: After processing following the manufacturers' instructions, specimens (5mm diameter and 2mm thickness) were dry stored at room temperature and the Vickers hardness (VHN) was measured with a hardness tester after 0, 2, 7, 30 and 90 days. Specimens were then immersed in water at 37ºC and hardness was evaluated after the same time intervals. Five specimens were prepared for each material. Data were analyzed by Kruskal-Wallis test (P=.01). RESULTS: When dry stored, material L showed an increase in hardness (P;.01). After 2-day water storage, all materials showed a significant reduction in hardness (P
publishDate 2005
dc.date.none.fl_str_mv 2005-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3295
10.1590/S1678-77572005000300017
url https://www.revistas.usp.br/jaos/article/view/3295
identifier_str_mv 10.1590/S1678-77572005000300017
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3295/3985
dc.rights.driver.fl_str_mv Copyright (c) 2005 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2005 Journal of Applied Oral Science
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
dc.source.none.fl_str_mv Journal of Applied Oral Science; Vol. 13 No. 3 (2005); 291-295
Journal of Applied Oral Science; Vol. 13 Núm. 3 (2005); 291-295
Journal of Applied Oral Science; v. 13 n. 3 (2005); 291-295
1678-7765
1678-7757
reponame:Journal of applied oral science (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Journal of applied oral science (Online)
collection Journal of applied oral science (Online)
repository.name.fl_str_mv Journal of applied oral science (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ||jaos@usp.br
_version_ 1787713188985307136

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