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: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0366-69132018643722382 http://hdl.handle.net/11449/186966 |
Resumo: | 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 restorationsFixed dental prostheses (FDPs)Mechanical propertiesMetal-free systemsVeneering ceramicsFour 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.Universidade Estadual Paulista - UNESP Faculdade de Odontologia de Araraquara, R. Humaitá 1740Universidade Estadual Paulista - UNESP Faculdade de Engenharia de GuaratinguetáUniversidade Do Estado Do Rio de Janeiro Faculdade de TecnologiaUniversidade Estadual Paulista - UNESP Faculdade de Odontologia de Araraquara, R. Humaitá 1740Universidade Estadual Paulista - UNESP Faculdade de Engenharia de GuaratinguetáUniversidade Estadual Paulista (Unesp)Universidade do Estado do Rio de Janeiro (UERJ)De Almeida, A. A. [UNESP]Adabo, G. L. [UNESP]Galvão, B. R. [UNESP]Longhini, D. [UNESP]Simba, B. G. [UNESP]Dos Santos, C.2019-10-06T15:21:22Z2019-10-06T15:21:22Z2018-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article491-497application/pdfhttp://dx.doi.org/10.1590/0366-69132018643722382Ceramica, v. 64, n. 372, p. 491-497, 2018.1678-45530366-6913http://hdl.handle.net/11449/18696610.1590/0366-69132018643722382S0366-691320180004004912-s2.0-85054985859S0366-69132018000400491.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramicainfo:eu-repo/semantics/openAccess2023-12-19T06:24:35Zoai:repositorio.unesp.br:11449/186966Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:46:01.962437Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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 De Almeida, A. A. [UNESP] Fixed dental prostheses (FDPs) Mechanical properties Metal-free systems Veneering ceramics |
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 |
De Almeida, A. A. [UNESP] |
author_facet |
De Almeida, A. A. [UNESP] Adabo, G. L. [UNESP] Galvão, B. R. [UNESP] Longhini, D. [UNESP] Simba, B. G. [UNESP] Dos Santos, C. |
author_role |
author |
author2 |
Adabo, G. L. [UNESP] Galvão, B. R. [UNESP] Longhini, D. [UNESP] Simba, B. G. [UNESP] Dos Santos, C. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade do Estado do Rio de Janeiro (UERJ) |
dc.contributor.author.fl_str_mv |
De Almeida, A. A. [UNESP] Adabo, G. L. [UNESP] Galvão, B. R. [UNESP] Longhini, D. [UNESP] Simba, B. G. [UNESP] Dos Santos, C. |
dc.subject.por.fl_str_mv |
Fixed dental prostheses (FDPs) Mechanical properties Metal-free systems Veneering ceramics |
topic |
Fixed dental prostheses (FDPs) Mechanical properties Metal-free systems Veneering ceramics |
description |
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 |
2018-10-01 2019-10-06T15:21:22Z 2019-10-06T15:21:22Z |
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/10.1590/0366-69132018643722382 Ceramica, v. 64, n. 372, p. 491-497, 2018. 1678-4553 0366-6913 http://hdl.handle.net/11449/186966 10.1590/0366-69132018643722382 S0366-69132018000400491 2-s2.0-85054985859 S0366-69132018000400491.pdf |
url |
http://dx.doi.org/10.1590/0366-69132018643722382 http://hdl.handle.net/11449/186966 |
identifier_str_mv |
Ceramica, v. 64, n. 372, p. 491-497, 2018. 1678-4553 0366-6913 10.1590/0366-69132018643722382 S0366-69132018000400491 2-s2.0-85054985859 S0366-69132018000400491.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramica |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
491-497 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808129245238525952 |