Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0103-6440201600709 http://hdl.handle.net/11449/173923 |
Resumo: | The aim of this study was to characterize a conventional and a pressed porcelain for zirconia core as to biaxial flexural strength (BFS), apparent fracture toughness (FT) and microstructure composition, and to investigate the effect of glaze cooling rate on the BFS of the zirconia/porcelain bilayers. Monolayers of conventional porcelain Vita VM9 and pressed porcelain Vita PM9 (n=15) (12 mm diameter x 1.2 mm thick) were prepared for the BFS test (MPa). Apparent fracture toughness (MPa.m1/2) was measured by indentation technique (n=15). t-Student test was performed for statistical analysis. Scanning electron microscopy and x-ray diffraction were used to analyze the porcelain’s microstructure. For the BFS of bilayers, zirconia discs (12 mm diameter x 1 mm thick) (Vita In-Ceram YZ) were veneered with the two porcelains (1 mm thick). After the glaze firing simulation, the specimens were submitted to fast or slow cooling (n=15). Apparent fracture toughness (MPa.m1/2) was measured on the porcelain surface of bilayers (n=15) and residual stress was calculated. Two-way ANOVA (porcelain and cooling method) was used for the bilayer analysis (α=0.05). Vita PM9 monolayer exhibited significantly higher BFS (p<0.01), but there was no significant difference (p=0.41) in the FT between the porcelains. For bilayer specimens, the two-way ANOVA for BFS was significant for the porcelain variable only (p<0.01) better for Vita PM9/zirconia. Two-way ANOVA for the FT for the bilayers was not significant for any variable. All groups showed compressive residual stresses. The pressed porcelain seems to be mechanically more effective for zirconia veneering. |
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Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconiaDental porcelainMaterial resistanceZirconiumThe aim of this study was to characterize a conventional and a pressed porcelain for zirconia core as to biaxial flexural strength (BFS), apparent fracture toughness (FT) and microstructure composition, and to investigate the effect of glaze cooling rate on the BFS of the zirconia/porcelain bilayers. Monolayers of conventional porcelain Vita VM9 and pressed porcelain Vita PM9 (n=15) (12 mm diameter x 1.2 mm thick) were prepared for the BFS test (MPa). Apparent fracture toughness (MPa.m1/2) was measured by indentation technique (n=15). t-Student test was performed for statistical analysis. Scanning electron microscopy and x-ray diffraction were used to analyze the porcelain’s microstructure. For the BFS of bilayers, zirconia discs (12 mm diameter x 1 mm thick) (Vita In-Ceram YZ) were veneered with the two porcelains (1 mm thick). After the glaze firing simulation, the specimens were submitted to fast or slow cooling (n=15). Apparent fracture toughness (MPa.m1/2) was measured on the porcelain surface of bilayers (n=15) and residual stress was calculated. Two-way ANOVA (porcelain and cooling method) was used for the bilayer analysis (α=0.05). Vita PM9 monolayer exhibited significantly higher BFS (p<0.01), but there was no significant difference (p=0.41) in the FT between the porcelains. For bilayer specimens, the two-way ANOVA for BFS was significant for the porcelain variable only (p<0.01) better for Vita PM9/zirconia. Two-way ANOVA for the FT for the bilayers was not significant for any variable. All groups showed compressive residual stresses. The pressed porcelain seems to be mechanically more effective for zirconia veneering.Department of Dental Materials and Prosthodontics Araraquara Dental School UNESP-Universidade Estadual PaulistaDepartment of Biomaterials and Oral Biology Dental School of USP-Universidade de São PauloDepartment of Dental Materials and Prosthodontics Araraquara Dental School UNESP-Universidade Estadual PaulistaUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Longhini, Diogo [UNESP]Rocha, Cibele Oliveira de Melo [UNESP]Medeiros, Igor StudartFonseca, Renata Garcia [UNESP]Adabo, Gelson Luis [UNESP]2018-12-11T17:08:21Z2018-12-11T17:08:21Z2016-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article524-531application/pdfhttp://dx.doi.org/10.1590/0103-6440201600709Brazilian Dental Journal, v. 27, n. 5, p. 524-531, 2016.1806-47600103-6440http://hdl.handle.net/11449/17392310.1590/0103-6440201600709S0103-644020160005005242-s2.0-85006137621S0103-64402016000500524.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Dental Journal0,476info:eu-repo/semantics/openAccess2023-11-10T06:14:05Zoai:repositorio.unesp.br:11449/173923Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-10T06:14:05Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
title |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
spellingShingle |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia Longhini, Diogo [UNESP] Dental porcelain Material resistance Zirconium |
title_short |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
title_full |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
title_fullStr |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
title_full_unstemmed |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
title_sort |
Effect of glaze cooling rate on mechanical properties of conventional and pressed porcelain on zirconia |
author |
Longhini, Diogo [UNESP] |
author_facet |
Longhini, Diogo [UNESP] Rocha, Cibele Oliveira de Melo [UNESP] Medeiros, Igor Studart Fonseca, Renata Garcia [UNESP] Adabo, Gelson Luis [UNESP] |
author_role |
author |
author2 |
Rocha, Cibele Oliveira de Melo [UNESP] Medeiros, Igor Studart Fonseca, Renata Garcia [UNESP] Adabo, Gelson Luis [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Longhini, Diogo [UNESP] Rocha, Cibele Oliveira de Melo [UNESP] Medeiros, Igor Studart Fonseca, Renata Garcia [UNESP] Adabo, Gelson Luis [UNESP] |
dc.subject.por.fl_str_mv |
Dental porcelain Material resistance Zirconium |
topic |
Dental porcelain Material resistance Zirconium |
description |
The aim of this study was to characterize a conventional and a pressed porcelain for zirconia core as to biaxial flexural strength (BFS), apparent fracture toughness (FT) and microstructure composition, and to investigate the effect of glaze cooling rate on the BFS of the zirconia/porcelain bilayers. Monolayers of conventional porcelain Vita VM9 and pressed porcelain Vita PM9 (n=15) (12 mm diameter x 1.2 mm thick) were prepared for the BFS test (MPa). Apparent fracture toughness (MPa.m1/2) was measured by indentation technique (n=15). t-Student test was performed for statistical analysis. Scanning electron microscopy and x-ray diffraction were used to analyze the porcelain’s microstructure. For the BFS of bilayers, zirconia discs (12 mm diameter x 1 mm thick) (Vita In-Ceram YZ) were veneered with the two porcelains (1 mm thick). After the glaze firing simulation, the specimens were submitted to fast or slow cooling (n=15). Apparent fracture toughness (MPa.m1/2) was measured on the porcelain surface of bilayers (n=15) and residual stress was calculated. Two-way ANOVA (porcelain and cooling method) was used for the bilayer analysis (α=0.05). Vita PM9 monolayer exhibited significantly higher BFS (p<0.01), but there was no significant difference (p=0.41) in the FT between the porcelains. For bilayer specimens, the two-way ANOVA for BFS was significant for the porcelain variable only (p<0.01) better for Vita PM9/zirconia. Two-way ANOVA for the FT for the bilayers was not significant for any variable. All groups showed compressive residual stresses. The pressed porcelain seems to be mechanically more effective for zirconia veneering. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-01 2018-12-11T17:08:21Z 2018-12-11T17:08:21Z |
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/10.1590/0103-6440201600709 Brazilian Dental Journal, v. 27, n. 5, p. 524-531, 2016. 1806-4760 0103-6440 http://hdl.handle.net/11449/173923 10.1590/0103-6440201600709 S0103-64402016000500524 2-s2.0-85006137621 S0103-64402016000500524.pdf |
url |
http://dx.doi.org/10.1590/0103-6440201600709 http://hdl.handle.net/11449/173923 |
identifier_str_mv |
Brazilian Dental Journal, v. 27, n. 5, p. 524-531, 2016. 1806-4760 0103-6440 10.1590/0103-6440201600709 S0103-64402016000500524 2-s2.0-85006137621 S0103-64402016000500524.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Dental Journal 0,476 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
524-531 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_ |
1803046416297230336 |