Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.msea.2018.10.027 http://hdl.handle.net/11449/189666 |
Resumo: | This study evaluated the effect of the surface roughness parameters on the flexural strength of Yttria-partially stabilized zirconia, Y-TZP ceramics: ZrO2 (3 mol%) or ZrO2 (5 mol%), as function of different surface finishing protocols: polishing or alumina (Al2O3) blasting. Zirconia discs were manufactured by CAD/CAM prototyping and sintered at different temperatures. The specimens were characterized by X-ray diffraction, scanning electron microscopy, biaxial flexural strength test and 3D profilometry. In all specimens tetragonal Y2O3-ZrO2 was observed to be the main crystalline phase. The 3D profilometry indicated that alumina blasting of ZrO2 (3 mol%) increased the roughness Ra around 16–26 times as opposed to the polished surfaces, and approximately 38 times for ZrO2 (5 mol%) specimens when compared to the polished samples. The results of flexural strength indicate that groups of ZrO2 (3 mol% Y2O3) ceramics present a reduction of 21–23% from polished to alumina blasted specimens. In the group of ZrO2 (5 mol% Y2O3) ceramics, a flexural strength reduction of 37.5% was observed. A correlation between flexural strength, failure size and different roughness parameters: Ra (arithmetic average of the absolute values of the profile heights over the evaluation length), Rz (measure of the ordinates of the five highest peaks and the five deepest valleys along the specimen's length) and PV (mean values of peak and valley measured in the specimen space) is proposed and indicates that Rz and PV should not be neglected in a systematic evaluation of the surface roughness effect on the bulk mechanical properties of dental ceramics. |
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Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramicsDental materialsFlexural strengthRoughness parametersZirconiaThis study evaluated the effect of the surface roughness parameters on the flexural strength of Yttria-partially stabilized zirconia, Y-TZP ceramics: ZrO2 (3 mol%) or ZrO2 (5 mol%), as function of different surface finishing protocols: polishing or alumina (Al2O3) blasting. Zirconia discs were manufactured by CAD/CAM prototyping and sintered at different temperatures. The specimens were characterized by X-ray diffraction, scanning electron microscopy, biaxial flexural strength test and 3D profilometry. In all specimens tetragonal Y2O3-ZrO2 was observed to be the main crystalline phase. The 3D profilometry indicated that alumina blasting of ZrO2 (3 mol%) increased the roughness Ra around 16–26 times as opposed to the polished surfaces, and approximately 38 times for ZrO2 (5 mol%) specimens when compared to the polished samples. The results of flexural strength indicate that groups of ZrO2 (3 mol% Y2O3) ceramics present a reduction of 21–23% from polished to alumina blasted specimens. In the group of ZrO2 (5 mol% Y2O3) ceramics, a flexural strength reduction of 37.5% was observed. A correlation between flexural strength, failure size and different roughness parameters: Ra (arithmetic average of the absolute values of the profile heights over the evaluation length), Rz (measure of the ordinates of the five highest peaks and the five deepest valleys along the specimen's length) and PV (mean values of peak and valley measured in the specimen space) is proposed and indicates that Rz and PV should not be neglected in a systematic evaluation of the surface roughness effect on the bulk mechanical properties of dental ceramics.Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Catholic University of Rio de Janeiro Department of Chemical and Materials Engineering PUC-Rio, Marques de São Vicente St 225, GáveaFluminense Federal University / Faculty of Dentistry - Institute of Health of Nova Friburgo, Dr. Silvio Henrique Braune St, 22 - DowntownUniversity of Toronto / Faculty of Dentistry, 124 Edward St #539State University of Rio de Janeiro – Faculty of Technology, Presidente Dutra Highway, km 298São Paulo State University - Faculty of Engineering of Guaratinguetá UNESP/FEG, Ariberto Pereira da Cunha Ave, 333 - Portal das ColinasSão Paulo State University - Faculty of Engineering of Guaratinguetá UNESP/FEG, Ariberto Pereira da Cunha Ave, 333 - Portal das ColinasFAPERJ: E26-201.476/2014PUC-RioFluminense Federal University / Faculty of Dentistry - Institute of Health of Nova FriburgoUniversity of Toronto / Faculty of DentistryState University of Rio de Janeiro – Faculty of TechnologyUniversidade Estadual Paulista (Unesp)Amarante, José Eduardo VasconcellosPereira, Marcos Venícius Soaresde Souza, Grace MendonçaPais Alves, Manuel Fellipe R.Simba, Bruno Galvão [UNESP]dos Santos, Claudinei2019-10-06T16:48:11Z2019-10-06T16:48:11Z2019-01-02info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article149-157http://dx.doi.org/10.1016/j.msea.2018.10.027Materials Science and Engineering A, v. 739, p. 149-157.0921-5093http://hdl.handle.net/11449/18966610.1016/j.msea.2018.10.0272-s2.0-85054902874Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Science and Engineering Ainfo:eu-repo/semantics/openAccess2021-10-23T16:36:51Zoai:repositorio.unesp.br:11449/189666Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T16:36:51Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
title |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
spellingShingle |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics Amarante, José Eduardo Vasconcellos Dental materials Flexural strength Roughness parameters Zirconia |
title_short |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
title_full |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
title_fullStr |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
title_full_unstemmed |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
title_sort |
Roughness and its effects on flexural strength of dental yttria-stabilized zirconia ceramics |
author |
Amarante, José Eduardo Vasconcellos |
author_facet |
Amarante, José Eduardo Vasconcellos Pereira, Marcos Venícius Soares de Souza, Grace Mendonça Pais Alves, Manuel Fellipe R. Simba, Bruno Galvão [UNESP] dos Santos, Claudinei |
author_role |
author |
author2 |
Pereira, Marcos Venícius Soares de Souza, Grace Mendonça Pais Alves, Manuel Fellipe R. Simba, Bruno Galvão [UNESP] dos Santos, Claudinei |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
PUC-Rio Fluminense Federal University / Faculty of Dentistry - Institute of Health of Nova Friburgo University of Toronto / Faculty of Dentistry State University of Rio de Janeiro – Faculty of Technology Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Amarante, José Eduardo Vasconcellos Pereira, Marcos Venícius Soares de Souza, Grace Mendonça Pais Alves, Manuel Fellipe R. Simba, Bruno Galvão [UNESP] dos Santos, Claudinei |
dc.subject.por.fl_str_mv |
Dental materials Flexural strength Roughness parameters Zirconia |
topic |
Dental materials Flexural strength Roughness parameters Zirconia |
description |
This study evaluated the effect of the surface roughness parameters on the flexural strength of Yttria-partially stabilized zirconia, Y-TZP ceramics: ZrO2 (3 mol%) or ZrO2 (5 mol%), as function of different surface finishing protocols: polishing or alumina (Al2O3) blasting. Zirconia discs were manufactured by CAD/CAM prototyping and sintered at different temperatures. The specimens were characterized by X-ray diffraction, scanning electron microscopy, biaxial flexural strength test and 3D profilometry. In all specimens tetragonal Y2O3-ZrO2 was observed to be the main crystalline phase. The 3D profilometry indicated that alumina blasting of ZrO2 (3 mol%) increased the roughness Ra around 16–26 times as opposed to the polished surfaces, and approximately 38 times for ZrO2 (5 mol%) specimens when compared to the polished samples. The results of flexural strength indicate that groups of ZrO2 (3 mol% Y2O3) ceramics present a reduction of 21–23% from polished to alumina blasted specimens. In the group of ZrO2 (5 mol% Y2O3) ceramics, a flexural strength reduction of 37.5% was observed. A correlation between flexural strength, failure size and different roughness parameters: Ra (arithmetic average of the absolute values of the profile heights over the evaluation length), Rz (measure of the ordinates of the five highest peaks and the five deepest valleys along the specimen's length) and PV (mean values of peak and valley measured in the specimen space) is proposed and indicates that Rz and PV should not be neglected in a systematic evaluation of the surface roughness effect on the bulk mechanical properties of dental ceramics. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T16:48:11Z 2019-10-06T16:48:11Z 2019-01-02 |
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/10.1016/j.msea.2018.10.027 Materials Science and Engineering A, v. 739, p. 149-157. 0921-5093 http://hdl.handle.net/11449/189666 10.1016/j.msea.2018.10.027 2-s2.0-85054902874 |
url |
http://dx.doi.org/10.1016/j.msea.2018.10.027 http://hdl.handle.net/11449/189666 |
identifier_str_mv |
Materials Science and Engineering A, v. 739, p. 149-157. 0921-5093 10.1016/j.msea.2018.10.027 2-s2.0-85054902874 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Science and Engineering A |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
149-157 |
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 |
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1797790063620259840 |