Effect of hydrothermal aging on the properties of zirconia with different levels of translucency
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jmbbm.2020.103847 http://hdl.handle.net/11449/201129 |
Resumo: | Objectives: The aim of this study was to evaluate the effect of hydrothermal aging on the mechanical properties and translucency of dental zirconia with different levels of translucency. Methods: Three different types of dental yttria-stabilized zirconia were used: 3Y-TZP (ZrO2 - 3 mol.% Y2O3) of medium opacity (designated Z3OP), 3Y-TZP of medium translucency (Z3MT), and 5Y-PSZ (ZrO2 - 5 mol.% Y2O3) of high translucency (Z5HT). A total of 120 specimens were sintered (n = 40 specimens/group). The control group (sintered→polished→heat-treated) and the aged group (sintered→polished→heat-treated→hydrothermally degraded at 134 °C, 2 bar, 5h) were characterized by relative density, quantitative phase analysis by X-ray diffraction using the Rietveld method, microstructural analysis by scanning electron microscopy, surface roughness and translucency. All groups were submitted to a biaxial flexural strength test. Data analysis using Kruskal-Wallis, Nemenyi (p-value = 0.05), and Weibull statistics were used. Results: All sintered specimens presented full densification. After aging, an increase of the m-ZrO2 phase content was observed for the Z3OP group. On the other hand, Z3MT and Z5HT did not show any m-ZrO2 phase, indicating resistance to the hydrothermal degradation. Smaller grains were observed in the Z3MT group in relation to Z3OP group and the Z5HT group presented a bimodal grain distribution, where the largest grains were associated to cubic ZrO2. Z3OP exhibited a slight increase in roughness as a function of degradation, while the roughness remained statistically stable in the other groups. Translucency was little influenced by degradation, but considerably affected by increasing thickness. The Z5HT samples were the group with the highest translucency among the control groups. Z3OP exhibited the highest flexural strength, while being the most susceptible to hydrothermal degradation. The lowest values were presented by Z5HT in all groups, due to the high concentration of c-ZrO2 grains. Conclusion: Hydrothermal aging is less critical to the flexural strength of zirconia-based materials than the materials’ composition and microstructure. Z5HT zirconia showed the highest translucency, however the measured difference is not visually perceptible. Z5HT was considered the most resistant to hydrothermal degradation. |
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Effect of hydrothermal aging on the properties of zirconia with different levels of translucencyBiaxial flexural strengthDental ceramicsHydrothermal degradationTranslucenceYttria-stabilized zirconiaObjectives: The aim of this study was to evaluate the effect of hydrothermal aging on the mechanical properties and translucency of dental zirconia with different levels of translucency. Methods: Three different types of dental yttria-stabilized zirconia were used: 3Y-TZP (ZrO2 - 3 mol.% Y2O3) of medium opacity (designated Z3OP), 3Y-TZP of medium translucency (Z3MT), and 5Y-PSZ (ZrO2 - 5 mol.% Y2O3) of high translucency (Z5HT). A total of 120 specimens were sintered (n = 40 specimens/group). The control group (sintered→polished→heat-treated) and the aged group (sintered→polished→heat-treated→hydrothermally degraded at 134 °C, 2 bar, 5h) were characterized by relative density, quantitative phase analysis by X-ray diffraction using the Rietveld method, microstructural analysis by scanning electron microscopy, surface roughness and translucency. All groups were submitted to a biaxial flexural strength test. Data analysis using Kruskal-Wallis, Nemenyi (p-value = 0.05), and Weibull statistics were used. Results: All sintered specimens presented full densification. After aging, an increase of the m-ZrO2 phase content was observed for the Z3OP group. On the other hand, Z3MT and Z5HT did not show any m-ZrO2 phase, indicating resistance to the hydrothermal degradation. Smaller grains were observed in the Z3MT group in relation to Z3OP group and the Z5HT group presented a bimodal grain distribution, where the largest grains were associated to cubic ZrO2. Z3OP exhibited a slight increase in roughness as a function of degradation, while the roughness remained statistically stable in the other groups. Translucency was little influenced by degradation, but considerably affected by increasing thickness. The Z5HT samples were the group with the highest translucency among the control groups. Z3OP exhibited the highest flexural strength, while being the most susceptible to hydrothermal degradation. The lowest values were presented by Z5HT in all groups, due to the high concentration of c-ZrO2 grains. Conclusion: Hydrothermal aging is less critical to the flexural strength of zirconia-based materials than the materials’ composition and microstructure. Z5HT zirconia showed the highest translucency, however the measured difference is not visually perceptible. Z5HT was considered the most resistant to hydrothermal degradation.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Fluminense Federal University Faculty of Dentistry Institute of Health of Nova Friburgo, Dr. Silvio Henrique Braune St, 22 - DowntownPontical Catholic University of Rio de Janeiro Department of Chemical and Materials Engineering PUC-Rio, Marques de São Vicente St 225, GáveaUniversity 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 ColinasCNPq: 308684/2013-3/311119/2017-4FAPERJ: E-26-201.476/2014Institute of Health of Nova FriburgoPUC-RioFaculty of DentistryFaculty of TechnologyUniversidade Estadual Paulista (Unesp)Amarante, José Eduardo VasconcellosSoares Pereira, Marcos VeníciusDe Souza, Grace MendonçaPais Alves, Manuel Fellipe R.Simba, Bruno Galvão [UNESP]Santos, Claudinei dos2020-12-12T02:24:49Z2020-12-12T02:24:49Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.jmbbm.2020.103847Journal of the Mechanical Behavior of Biomedical Materials, v. 109.1878-01801751-6161http://hdl.handle.net/11449/20112910.1016/j.jmbbm.2020.1038472-s2.0-85084939745Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Mechanical Behavior of Biomedical Materialsinfo:eu-repo/semantics/openAccess2021-10-23T16:08:36Zoai:repositorio.unesp.br:11449/201129Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:12:26.559473Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
title |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
spellingShingle |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency Amarante, José Eduardo Vasconcellos Biaxial flexural strength Dental ceramics Hydrothermal degradation Translucence Yttria-stabilized zirconia |
title_short |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
title_full |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
title_fullStr |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
title_full_unstemmed |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
title_sort |
Effect of hydrothermal aging on the properties of zirconia with different levels of translucency |
author |
Amarante, José Eduardo Vasconcellos |
author_facet |
Amarante, José Eduardo Vasconcellos Soares Pereira, Marcos Venícius De Souza, Grace Mendonça Pais Alves, Manuel Fellipe R. Simba, Bruno Galvão [UNESP] Santos, Claudinei dos |
author_role |
author |
author2 |
Soares Pereira, Marcos Venícius De Souza, Grace Mendonça Pais Alves, Manuel Fellipe R. Simba, Bruno Galvão [UNESP] Santos, Claudinei dos |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Institute of Health of Nova Friburgo PUC-Rio Faculty of Dentistry Faculty of Technology Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Amarante, José Eduardo Vasconcellos Soares Pereira, Marcos Venícius De Souza, Grace Mendonça Pais Alves, Manuel Fellipe R. Simba, Bruno Galvão [UNESP] Santos, Claudinei dos |
dc.subject.por.fl_str_mv |
Biaxial flexural strength Dental ceramics Hydrothermal degradation Translucence Yttria-stabilized zirconia |
topic |
Biaxial flexural strength Dental ceramics Hydrothermal degradation Translucence Yttria-stabilized zirconia |
description |
Objectives: The aim of this study was to evaluate the effect of hydrothermal aging on the mechanical properties and translucency of dental zirconia with different levels of translucency. Methods: Three different types of dental yttria-stabilized zirconia were used: 3Y-TZP (ZrO2 - 3 mol.% Y2O3) of medium opacity (designated Z3OP), 3Y-TZP of medium translucency (Z3MT), and 5Y-PSZ (ZrO2 - 5 mol.% Y2O3) of high translucency (Z5HT). A total of 120 specimens were sintered (n = 40 specimens/group). The control group (sintered→polished→heat-treated) and the aged group (sintered→polished→heat-treated→hydrothermally degraded at 134 °C, 2 bar, 5h) were characterized by relative density, quantitative phase analysis by X-ray diffraction using the Rietveld method, microstructural analysis by scanning electron microscopy, surface roughness and translucency. All groups were submitted to a biaxial flexural strength test. Data analysis using Kruskal-Wallis, Nemenyi (p-value = 0.05), and Weibull statistics were used. Results: All sintered specimens presented full densification. After aging, an increase of the m-ZrO2 phase content was observed for the Z3OP group. On the other hand, Z3MT and Z5HT did not show any m-ZrO2 phase, indicating resistance to the hydrothermal degradation. Smaller grains were observed in the Z3MT group in relation to Z3OP group and the Z5HT group presented a bimodal grain distribution, where the largest grains were associated to cubic ZrO2. Z3OP exhibited a slight increase in roughness as a function of degradation, while the roughness remained statistically stable in the other groups. Translucency was little influenced by degradation, but considerably affected by increasing thickness. The Z5HT samples were the group with the highest translucency among the control groups. Z3OP exhibited the highest flexural strength, while being the most susceptible to hydrothermal degradation. The lowest values were presented by Z5HT in all groups, due to the high concentration of c-ZrO2 grains. Conclusion: Hydrothermal aging is less critical to the flexural strength of zirconia-based materials than the materials’ composition and microstructure. Z5HT zirconia showed the highest translucency, however the measured difference is not visually perceptible. Z5HT was considered the most resistant to hydrothermal degradation. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:24:49Z 2020-12-12T02:24:49Z 2020-09-01 |
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.jmbbm.2020.103847 Journal of the Mechanical Behavior of Biomedical Materials, v. 109. 1878-0180 1751-6161 http://hdl.handle.net/11449/201129 10.1016/j.jmbbm.2020.103847 2-s2.0-85084939745 |
url |
http://dx.doi.org/10.1016/j.jmbbm.2020.103847 http://hdl.handle.net/11449/201129 |
identifier_str_mv |
Journal of the Mechanical Behavior of Biomedical Materials, v. 109. 1878-0180 1751-6161 10.1016/j.jmbbm.2020.103847 2-s2.0-85084939745 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Mechanical Behavior of Biomedical Materials |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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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1808129032913420288 |