Bending strength and reliability of porcelains used in all-ceramic dental restorations
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerâmica (São Paulo. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132018000400491 |
Resumo: | Abstract Four dental porcelains for covering zirconia were sintered (fired) at 910-960 °C and characterized, focusing in analyzing reliability, physical and mechanical properties. Samples with relative density close to 99% presented leucite crystallization apart from residual amorphous phase. Hardness between 491±23 and 575±32 HV was different among all ceramics. Fracture toughness between 1.13±0.11 and 1.42±0.25 MPa.m1/2 was statistically different. Bending strength results were not different for three porcelain groups (73±9 to 75±12 MPa), with the exception of one specific group (62±4 MPa). Weibull analysis indicated bending strength between 73 and 75 MPa, Weibull modulus (m) between 5.7 and 7.1, while the ceramic with strength of 60 MPa presented m=13.6. The use of classical theory of fracture mechanics associated to the results of properties obtained in this work indicated the critical failure size in these ceramics lays between 65 and 90 μm and the theoretical fracture energy of porcelains is approximately from 10.5 to 16.3 J/m. It was concluded that the porcelains had different behavior, and it seems that there is no clear relationship among the studied properties. |
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Bending strength and reliability of porcelains used in all-ceramic dental restorationsmetal-free systemsfixed dental prostheses (FDPs)veneering ceramicsmechanical propertiesAbstract Four dental porcelains for covering zirconia were sintered (fired) at 910-960 °C and characterized, focusing in analyzing reliability, physical and mechanical properties. Samples with relative density close to 99% presented leucite crystallization apart from residual amorphous phase. Hardness between 491±23 and 575±32 HV was different among all ceramics. Fracture toughness between 1.13±0.11 and 1.42±0.25 MPa.m1/2 was statistically different. Bending strength results were not different for three porcelain groups (73±9 to 75±12 MPa), with the exception of one specific group (62±4 MPa). Weibull analysis indicated bending strength between 73 and 75 MPa, Weibull modulus (m) between 5.7 and 7.1, while the ceramic with strength of 60 MPa presented m=13.6. The use of classical theory of fracture mechanics associated to the results of properties obtained in this work indicated the critical failure size in these ceramics lays between 65 and 90 μm and the theoretical fracture energy of porcelains is approximately from 10.5 to 16.3 J/m. It was concluded that the porcelains had different behavior, and it seems that there is no clear relationship among the studied properties.Associação Brasileira de Cerâmica2018-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132018000400491Cerâmica v.64 n.372 2018reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132018643722382info:eu-repo/semantics/openAccessAlmeida Junior,A. A. deAdabo,G. L.Galvão,B. R.Longhini,D.Simba,B. G.Santos,C. doseng2018-10-02T00:00:00Zoai:scielo:S0366-69132018000400491Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2018-10-02T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
title |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
spellingShingle |
Bending strength and reliability of porcelains used in all-ceramic dental restorations Almeida Junior,A. A. de metal-free systems fixed dental prostheses (FDPs) veneering ceramics mechanical properties |
title_short |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
title_full |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
title_fullStr |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
title_full_unstemmed |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
title_sort |
Bending strength and reliability of porcelains used in all-ceramic dental restorations |
author |
Almeida Junior,A. A. de |
author_facet |
Almeida Junior,A. A. de Adabo,G. L. Galvão,B. R. Longhini,D. Simba,B. G. Santos,C. dos |
author_role |
author |
author2 |
Adabo,G. L. Galvão,B. R. Longhini,D. Simba,B. G. Santos,C. dos |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Almeida Junior,A. A. de Adabo,G. L. Galvão,B. R. Longhini,D. Simba,B. G. Santos,C. dos |
dc.subject.por.fl_str_mv |
metal-free systems fixed dental prostheses (FDPs) veneering ceramics mechanical properties |
topic |
metal-free systems fixed dental prostheses (FDPs) veneering ceramics mechanical properties |
description |
Abstract Four dental porcelains for covering zirconia were sintered (fired) at 910-960 °C and characterized, focusing in analyzing reliability, physical and mechanical properties. Samples with relative density close to 99% presented leucite crystallization apart from residual amorphous phase. Hardness between 491±23 and 575±32 HV was different among all ceramics. Fracture toughness between 1.13±0.11 and 1.42±0.25 MPa.m1/2 was statistically different. Bending strength results were not different for three porcelain groups (73±9 to 75±12 MPa), with the exception of one specific group (62±4 MPa). Weibull analysis indicated bending strength between 73 and 75 MPa, Weibull modulus (m) between 5.7 and 7.1, while the ceramic with strength of 60 MPa presented m=13.6. The use of classical theory of fracture mechanics associated to the results of properties obtained in this work indicated the critical failure size in these ceramics lays between 65 and 90 μm and the theoretical fracture energy of porcelains is approximately from 10.5 to 16.3 J/m. It was concluded that the porcelains had different behavior, and it seems that there is no clear relationship among the studied properties. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-01 |
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=S0366-69132018000400491 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132018000400491 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0366-69132018643722382 |
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 |
Associação Brasileira de Cerâmica |
publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
dc.source.none.fl_str_mv |
Cerâmica v.64 n.372 2018 reponame:Cerâmica (São Paulo. Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Cerâmica (São Paulo. Online) |
collection |
Cerâmica (São Paulo. Online) |
repository.name.fl_str_mv |
Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
ceram.abc@gmail.com||ceram.abc@gmail.com |
_version_ |
1748936784217112576 |