Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4047/jap.2021.13.6.385 http://hdl.handle.net/11449/234048 |
Resumo: | PURPOSE. To characterize the microstructure of three yttria partially stabilized zirconia ceramics and to compare their hardness, indentation fracture resistance (IFR), biaxial flexural strength (BFS), and fatigue flexural strength. MATERIALS AND METHODS. Disc-shaped specimens were obtained from 3Y-TZP (Vita YZ HT), 4Y-PSZ (Vita YZ ST) and 5Y-PSZ (Vita YZ XT), following the ISO 6872/2015 guidelines for BFS testing (final dimensions of 12 mm in diameter, 0.7 and 1.2 ± 0.1 mm in thicknesses). Energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were performed, and mechanical properties were assessed by Vickers hardness, IFR, quasi-static BFS and fatigue tests. RESULTS. All ceramics showed similar chemical compositions, but mainly differed in the amount of yttria, which was higher as the amount of cubic phase in the diffractogram (5Y-PSZ > 4Y-PSZ > 3Y-TZP). The 4Y- and 5Y-PSZ specimens showed surface defects under SEM, while 3Y-TZP exhibited greater grain uniformity on the surface. 5Y-PSZ and 3Y-TZP presented the highest hardness values, while 3Y-TZP was higher than 4Y- and 5Y-PSZ with regard to the IFR. The 5Y-PSZ specimen (0.7 and 1.2 mm) showed the worst mechanical performance (fatigue BFS and cycles until failure), while 3Y-TZP and 4Y-PSZ presented statistically similar values, higher than 5Y-PSZ for both thicknesses (0.7 and 1.2 mm). Moreover, 3Y-TZP showed the highest (1.2 mm group) and the lowest (0.7 mm group) degradation percentage, and 5Y-PSZ had higher strength degradation than 4Y-PSZ group. CONCLUSION. Despite the microstructural differences, 4Y-PSZ and 3Y-TZP had similar fatigue behavior regardless of thickness. 5Y-PSZ had the lowest mechanical performance. [J Adv Prosthodont 2021;13:385–95] |
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Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknessesDental ceramicsMaterial thicknessMechanical stressStep-stress accelerated fatigue testY-TZP ceramicPURPOSE. To characterize the microstructure of three yttria partially stabilized zirconia ceramics and to compare their hardness, indentation fracture resistance (IFR), biaxial flexural strength (BFS), and fatigue flexural strength. MATERIALS AND METHODS. Disc-shaped specimens were obtained from 3Y-TZP (Vita YZ HT), 4Y-PSZ (Vita YZ ST) and 5Y-PSZ (Vita YZ XT), following the ISO 6872/2015 guidelines for BFS testing (final dimensions of 12 mm in diameter, 0.7 and 1.2 ± 0.1 mm in thicknesses). Energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were performed, and mechanical properties were assessed by Vickers hardness, IFR, quasi-static BFS and fatigue tests. RESULTS. All ceramics showed similar chemical compositions, but mainly differed in the amount of yttria, which was higher as the amount of cubic phase in the diffractogram (5Y-PSZ > 4Y-PSZ > 3Y-TZP). The 4Y- and 5Y-PSZ specimens showed surface defects under SEM, while 3Y-TZP exhibited greater grain uniformity on the surface. 5Y-PSZ and 3Y-TZP presented the highest hardness values, while 3Y-TZP was higher than 4Y- and 5Y-PSZ with regard to the IFR. The 5Y-PSZ specimen (0.7 and 1.2 mm) showed the worst mechanical performance (fatigue BFS and cycles until failure), while 3Y-TZP and 4Y-PSZ presented statistically similar values, higher than 5Y-PSZ for both thicknesses (0.7 and 1.2 mm). Moreover, 3Y-TZP showed the highest (1.2 mm group) and the lowest (0.7 mm group) degradation percentage, and 5Y-PSZ had higher strength degradation than 4Y-PSZ group. CONCLUSION. Despite the microstructural differences, 4Y-PSZ and 3Y-TZP had similar fatigue behavior regardless of thickness. 5Y-PSZ had the lowest mechanical performance. [J Adv Prosthodont 2021;13:385–95]Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) Institute of Science and TechnologyCollege of Dentistry University of Taubaté (Unitau)Technological Institute of Aeronautics Physics departmentCollege of Dentistry Federal University of Santa Maria (UFSM)Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) Institute of Science and TechnologyUniversidade Estadual Paulista (UNESP)University of Taubaté (Unitau)Physics departmentUniversidade Federal de Sergipe (UFS)Arcila, Laura Viviana Calvache [UNESP]de Carvalho Ramos, Nathália [UNESP]Campos, Tiago Moreira BastosDapieve, Kiara SerafiniValandro, Luiz Felipede Melo, Renata Marques [UNESP]Bottino, Marco Antonio [UNESP]2022-05-01T12:56:29Z2022-05-01T12:56:29Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article385-395http://dx.doi.org/10.4047/jap.2021.13.6.385Journal of Advanced Prosthodontics, v. 13, n. 6, p. 385-395, 2021.2005-78142005-7806http://hdl.handle.net/11449/23404810.4047/jap.2021.13.6.3852-s2.0-85123458726Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Advanced Prosthodonticsinfo:eu-repo/semantics/openAccess2022-05-01T12:56:29Zoai:repositorio.unesp.br:11449/234048Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-05-23T19:53:07.907539Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
title |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
spellingShingle |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses Arcila, Laura Viviana Calvache [UNESP] Dental ceramics Material thickness Mechanical stress Step-stress accelerated fatigue test Y-TZP ceramic |
title_short |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
title_full |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
title_fullStr |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
title_full_unstemmed |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
title_sort |
Mechanical behavior and microstructural characterization of different zirconia polycrystals in different thicknesses |
author |
Arcila, Laura Viviana Calvache [UNESP] |
author_facet |
Arcila, Laura Viviana Calvache [UNESP] de Carvalho Ramos, Nathália [UNESP] Campos, Tiago Moreira Bastos Dapieve, Kiara Serafini Valandro, Luiz Felipe de Melo, Renata Marques [UNESP] Bottino, Marco Antonio [UNESP] |
author_role |
author |
author2 |
de Carvalho Ramos, Nathália [UNESP] Campos, Tiago Moreira Bastos Dapieve, Kiara Serafini Valandro, Luiz Felipe de Melo, Renata Marques [UNESP] Bottino, Marco Antonio [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) University of Taubaté (Unitau) Physics department Universidade Federal de Sergipe (UFS) |
dc.contributor.author.fl_str_mv |
Arcila, Laura Viviana Calvache [UNESP] de Carvalho Ramos, Nathália [UNESP] Campos, Tiago Moreira Bastos Dapieve, Kiara Serafini Valandro, Luiz Felipe de Melo, Renata Marques [UNESP] Bottino, Marco Antonio [UNESP] |
dc.subject.por.fl_str_mv |
Dental ceramics Material thickness Mechanical stress Step-stress accelerated fatigue test Y-TZP ceramic |
topic |
Dental ceramics Material thickness Mechanical stress Step-stress accelerated fatigue test Y-TZP ceramic |
description |
PURPOSE. To characterize the microstructure of three yttria partially stabilized zirconia ceramics and to compare their hardness, indentation fracture resistance (IFR), biaxial flexural strength (BFS), and fatigue flexural strength. MATERIALS AND METHODS. Disc-shaped specimens were obtained from 3Y-TZP (Vita YZ HT), 4Y-PSZ (Vita YZ ST) and 5Y-PSZ (Vita YZ XT), following the ISO 6872/2015 guidelines for BFS testing (final dimensions of 12 mm in diameter, 0.7 and 1.2 ± 0.1 mm in thicknesses). Energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were performed, and mechanical properties were assessed by Vickers hardness, IFR, quasi-static BFS and fatigue tests. RESULTS. All ceramics showed similar chemical compositions, but mainly differed in the amount of yttria, which was higher as the amount of cubic phase in the diffractogram (5Y-PSZ > 4Y-PSZ > 3Y-TZP). The 4Y- and 5Y-PSZ specimens showed surface defects under SEM, while 3Y-TZP exhibited greater grain uniformity on the surface. 5Y-PSZ and 3Y-TZP presented the highest hardness values, while 3Y-TZP was higher than 4Y- and 5Y-PSZ with regard to the IFR. The 5Y-PSZ specimen (0.7 and 1.2 mm) showed the worst mechanical performance (fatigue BFS and cycles until failure), while 3Y-TZP and 4Y-PSZ presented statistically similar values, higher than 5Y-PSZ for both thicknesses (0.7 and 1.2 mm). Moreover, 3Y-TZP showed the highest (1.2 mm group) and the lowest (0.7 mm group) degradation percentage, and 5Y-PSZ had higher strength degradation than 4Y-PSZ group. CONCLUSION. Despite the microstructural differences, 4Y-PSZ and 3Y-TZP had similar fatigue behavior regardless of thickness. 5Y-PSZ had the lowest mechanical performance. [J Adv Prosthodont 2021;13:385–95] |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 2022-05-01T12:56:29Z 2022-05-01T12:56:29Z |
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/10.4047/jap.2021.13.6.385 Journal of Advanced Prosthodontics, v. 13, n. 6, p. 385-395, 2021. 2005-7814 2005-7806 http://hdl.handle.net/11449/234048 10.4047/jap.2021.13.6.385 2-s2.0-85123458726 |
url |
http://dx.doi.org/10.4047/jap.2021.13.6.385 http://hdl.handle.net/11449/234048 |
identifier_str_mv |
Journal of Advanced Prosthodontics, v. 13, n. 6, p. 385-395, 2021. 2005-7814 2005-7806 10.4047/jap.2021.13.6.385 2-s2.0-85123458726 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Advanced Prosthodontics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
385-395 |
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_ |
1803045634427584512 |