Relative fracture toughness of differents dental ceramics

Detalhes bibliográficos
Autor(a) principal: Pagani, Clovis
Data de Publicação: 2003
Outros Autores: Miranda, Carolina Baptista, Bottino, Marco Cícero
Tipo de documento: Artigo
Idioma: por
Título da fonte: Journal of applied oral science (Online)
Texto Completo: https://www.revistas.usp.br/jaos/article/view/3117
Resumo: Although ceramics present high compressive strength, they are brittle materials due to their low tensile strength so they have lower capacity to absorb shocks. This study evaluated the fracture toughness of different ceramic systems, which refers to the ability of a friable material to absorb defformation energy. Three ceramic systems were investigated. Ten cylindrical samples (5,0mm x 3,0mm), were obtained from each ceramic material as follows: G1- 10 samples of Vitadur Alpha (Vita-Zahnfabrik); G2- 10 samples of IPS Empress2 (Ivoclar-Vivadent); G3- 10 samples of In-Ceram Alumina (Vita-Zahnfabrik). Fracture toughness values were collected upon indentation tests that were performed under a heavy load. A microhardness tester (Digital Microhardness Tester FM) utilized a 500gf load cell during 10seconds to perform four impressions on each sample. Statistically significant results were observed (ANOVA and Kruskal-Wallis tests). In-Ceram Alumina presented the highest median toughness values (2,96N/m3/2), followed by Vitadur Alpha (2,08N/m3/2) and IPS Empress2 (1,05N/m3/2). It may be concluded that different ceramic systems present distinct fracture toughness values, thus In-Ceram is capable of absorbing superior stress when compared to Vitadur Alpha and IPS Empress2.
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spelling Relative fracture toughness of differents dental ceramics Avaliação da tenacidade à fratura de diferentes sistemas cerâmicos Cerâmicas odontológicasTenacidade à fraturaMétodo da indentaçãoDental ceramicsFracture toughnessIndentation method Although ceramics present high compressive strength, they are brittle materials due to their low tensile strength so they have lower capacity to absorb shocks. This study evaluated the fracture toughness of different ceramic systems, which refers to the ability of a friable material to absorb defformation energy. Three ceramic systems were investigated. Ten cylindrical samples (5,0mm x 3,0mm), were obtained from each ceramic material as follows: G1- 10 samples of Vitadur Alpha (Vita-Zahnfabrik); G2- 10 samples of IPS Empress2 (Ivoclar-Vivadent); G3- 10 samples of In-Ceram Alumina (Vita-Zahnfabrik). Fracture toughness values were collected upon indentation tests that were performed under a heavy load. A microhardness tester (Digital Microhardness Tester FM) utilized a 500gf load cell during 10seconds to perform four impressions on each sample. Statistically significant results were observed (ANOVA and Kruskal-Wallis tests). In-Ceram Alumina presented the highest median toughness values (2,96N/m3/2), followed by Vitadur Alpha (2,08N/m3/2) and IPS Empress2 (1,05N/m3/2). It may be concluded that different ceramic systems present distinct fracture toughness values, thus In-Ceram is capable of absorbing superior stress when compared to Vitadur Alpha and IPS Empress2. Embora as cerâmicas possuam alta resistência à compressão, apresentam friabilidade devido à sua baixa resistência à tração e, desta forma, possuem menor capacidade de absorver impactos. Este trabalho avaliou a tenacidade à fratura de diferentes sistemas cerâmicos, que refere-se à medida da habilidade de absorção da energia de deformação de um material friável. Foram confeccionados 30 corpos-de-prova em forma de discos (5mmx3mm) utilizando-se três diferentes materiais cerâmicos, os quais foram divididos em 3 grupos: G1-10 amostras confeccionadas com a cerâmica Vitadur Alpha (Vita-Zahnfabrik); G2-10 amostras confeccionadas com a cerâmica IPS Empress 2 (Ivoclar-Vivadent) e G3-10 amostras confeccionadas com a cerâmica In-Ceram Alumina (Vita-Zahnfabrik). Para a obtenção dos valores de tenacidade foi utilizada a técnica da indentação que se baseia na série de fissuras que se formam sob uma carga pesada. Foram realizadas 4 impressões por amostra, utilizado um microdurômetro (Digital Microhardness Tester FM) com uma carga de 500gf, durante 10 segundos. A análise estatística dos dados (Testes ANOVA de Kruskal-Wallis e Dunn), indica que a cerâmica In-Ceram Alumina apresentou valor mediano (2,96N/m3/2), estatisticamente diferente do apresentado pela IPS Empress 2 (1,05N/m3/2), enquanto que a cerâmica Vitadur Alpha apresentou valores intermediários (2,08N/m3/2), sem diferenças estatísticas dos outros dois materiais. Conclui-se que as cerâmicas apresentam diferentes desempenhos de tenacidade à fratura, sendo a In-Ceram capaz de absorver maior energia comparada a Vitadur Alpha e ao IPS Empress2. Universidade de São Paulo. Faculdade de Odontologia de Bauru2003-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/311710.1590/S1678-77572003000100012Journal of Applied Oral Science; Vol. 11 No. 1 (2003); 69-75 Journal of Applied Oral Science; Vol. 11 Núm. 1 (2003); 69-75 Journal of Applied Oral Science; v. 11 n. 1 (2003); 69-75 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPporhttps://www.revistas.usp.br/jaos/article/view/3117/3806Copyright (c) 2003 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessPagani, ClovisMiranda, Carolina BaptistaBottino, Marco Cícero2012-04-27T11:43:45Zoai:revistas.usp.br:article/3117Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:43:45Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Relative fracture toughness of differents dental ceramics
Avaliação da tenacidade à fratura de diferentes sistemas cerâmicos
title Relative fracture toughness of differents dental ceramics
spellingShingle Relative fracture toughness of differents dental ceramics
Pagani, Clovis
Cerâmicas odontológicas
Tenacidade à fratura
Método da indentação
Dental ceramics
Fracture toughness
Indentation method
title_short Relative fracture toughness of differents dental ceramics
title_full Relative fracture toughness of differents dental ceramics
title_fullStr Relative fracture toughness of differents dental ceramics
title_full_unstemmed Relative fracture toughness of differents dental ceramics
title_sort Relative fracture toughness of differents dental ceramics
author Pagani, Clovis
author_facet Pagani, Clovis
Miranda, Carolina Baptista
Bottino, Marco Cícero
author_role author
author2 Miranda, Carolina Baptista
Bottino, Marco Cícero
author2_role author
author
dc.contributor.author.fl_str_mv Pagani, Clovis
Miranda, Carolina Baptista
Bottino, Marco Cícero
dc.subject.por.fl_str_mv Cerâmicas odontológicas
Tenacidade à fratura
Método da indentação
Dental ceramics
Fracture toughness
Indentation method
topic Cerâmicas odontológicas
Tenacidade à fratura
Método da indentação
Dental ceramics
Fracture toughness
Indentation method
description Although ceramics present high compressive strength, they are brittle materials due to their low tensile strength so they have lower capacity to absorb shocks. This study evaluated the fracture toughness of different ceramic systems, which refers to the ability of a friable material to absorb defformation energy. Three ceramic systems were investigated. Ten cylindrical samples (5,0mm x 3,0mm), were obtained from each ceramic material as follows: G1- 10 samples of Vitadur Alpha (Vita-Zahnfabrik); G2- 10 samples of IPS Empress2 (Ivoclar-Vivadent); G3- 10 samples of In-Ceram Alumina (Vita-Zahnfabrik). Fracture toughness values were collected upon indentation tests that were performed under a heavy load. A microhardness tester (Digital Microhardness Tester FM) utilized a 500gf load cell during 10seconds to perform four impressions on each sample. Statistically significant results were observed (ANOVA and Kruskal-Wallis tests). In-Ceram Alumina presented the highest median toughness values (2,96N/m3/2), followed by Vitadur Alpha (2,08N/m3/2) and IPS Empress2 (1,05N/m3/2). It may be concluded that different ceramic systems present distinct fracture toughness values, thus In-Ceram is capable of absorbing superior stress when compared to Vitadur Alpha and IPS Empress2.
publishDate 2003
dc.date.none.fl_str_mv 2003-03-01
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/3117
10.1590/S1678-77572003000100012
url https://www.revistas.usp.br/jaos/article/view/3117
identifier_str_mv 10.1590/S1678-77572003000100012
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3117/3806
dc.rights.driver.fl_str_mv Copyright (c) 2003 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2003 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. 11 No. 1 (2003); 69-75
Journal of Applied Oral Science; Vol. 11 Núm. 1 (2003); 69-75
Journal of Applied Oral Science; v. 11 n. 1 (2003); 69-75
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
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