Microstructure characterization and SCG of newly engineered dental ceramics
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/10.1016/j.dental.2016.03.018 http://hdl.handle.net/11449/178171 |
Resumo: | Objectives The aim of this study was to characterize the microstructure of four dental CAD-CAM ceramics and evaluate their susceptibility to stress corrosion. Methods SEM and EDS were performed for microstructural characterization. For evaluation of the pattern of crystallization of the ceramics and the molecular composition, XRD and FTIR, respectively, were used. Elastic modulus, Poisson's ratio, density and fracture toughness were also measured. The specimens were subjected to biaxial flexure under five stress rates (0.006, 0.06, 0.6, 6 and 60 MPa/s) to determine the subcritical crack growth parameters (n and D). Twenty-five specimens were further tested in mineral oil for determination of Weibull parameters. Two hundred forty ceramic discs (12 mm diameter and 1.2 mm thick) were made from four ceramics: feldspathic ceramic - FEL (Vita Mark II, Vita Zahnfabrik), ceramic-infiltrated polymer - PIC (Vita Enamic, Vita Zahnfabrik), lithium disilicate - LD (IPS e.max CAD, Ivoclar Vivadent) and zirconia-reinforced lithium silicate - LS (Vita Suprinity, Vita Zahnfabrik). Results PIC discs presented organic and inorganic phases (n = 29.1 ± 7.7) and Weibull modulus (m) of 8.96. The FEL discs showed n = 36.6 ± 6.8 and m = 8.02. The LD discs showed a structure with needle-like disilicate grains in a glassy matrix and had the lowest value of n (8.4 ± 0.8) and m = 6.19. The ZLS discs showed similar rod-like grains, n = 11.2 ± 1.4 and m = 9.98. Significance The FEL and PIC discs showed the lowest susceptibility to slow crack growth (SCG), whereas the LD and ZLS discs presented the highest. PIC presented the lowest elastic modulus and no crystals in its composition, while ZLS presented tetragonal zirconia. The overall strength and SCG of the new materials did not benefit from the additional phase or microconstituents present in them. |
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Microstructure characterization and SCG of newly engineered dental ceramicsCeramicsComputer-aided designDental porcelainFlexural strengthGlass ceramicsSpectroscopyStress corrosionSubcritical crack growthYoung's modulusObjectives The aim of this study was to characterize the microstructure of four dental CAD-CAM ceramics and evaluate their susceptibility to stress corrosion. Methods SEM and EDS were performed for microstructural characterization. For evaluation of the pattern of crystallization of the ceramics and the molecular composition, XRD and FTIR, respectively, were used. Elastic modulus, Poisson's ratio, density and fracture toughness were also measured. The specimens were subjected to biaxial flexure under five stress rates (0.006, 0.06, 0.6, 6 and 60 MPa/s) to determine the subcritical crack growth parameters (n and D). Twenty-five specimens were further tested in mineral oil for determination of Weibull parameters. Two hundred forty ceramic discs (12 mm diameter and 1.2 mm thick) were made from four ceramics: feldspathic ceramic - FEL (Vita Mark II, Vita Zahnfabrik), ceramic-infiltrated polymer - PIC (Vita Enamic, Vita Zahnfabrik), lithium disilicate - LD (IPS e.max CAD, Ivoclar Vivadent) and zirconia-reinforced lithium silicate - LS (Vita Suprinity, Vita Zahnfabrik). Results PIC discs presented organic and inorganic phases (n = 29.1 ± 7.7) and Weibull modulus (m) of 8.96. The FEL discs showed n = 36.6 ± 6.8 and m = 8.02. The LD discs showed a structure with needle-like disilicate grains in a glassy matrix and had the lowest value of n (8.4 ± 0.8) and m = 6.19. The ZLS discs showed similar rod-like grains, n = 11.2 ± 1.4 and m = 9.98. Significance The FEL and PIC discs showed the lowest susceptibility to slow crack growth (SCG), whereas the LD and ZLS discs presented the highest. PIC presented the lowest elastic modulus and no crystals in its composition, while ZLS presented tetragonal zirconia. The overall strength and SCG of the new materials did not benefit from the additional phase or microconstituents present in them.Department of Dental Materials and Prosthodontics São Paulo State University (UNESP) Institute of Science and Technology, 777 Eng. Francisco José Longo AvenueAeronautics Technological Institute (ITA), 50 Praça Marechal Eduardo GomesNational Institute for Space Research Laboratory of Sensors and Materials, 1758 Astronautas AvenueUniversity of São Paulo (USP) School of Dentistry Department of Biomaterials and Oral Biology, 2227 Prof. Lineu Prestes AvenueDepartment of Dental Materials and Prosthodontics São Paulo State University (UNESP) Institute of Science and Technology, 777 Eng. Francisco José Longo AvenueUniversidade Estadual Paulista (Unesp)Aeronautics Technological Institute (ITA)Laboratory of Sensors and MaterialsUniversidade de São Paulo (USP)Ramos, Nathália De Carvalho [UNESP]Campos, Tiago Moreira BastosPaz, Igor Siqueira De La [UNESP]MacHado, João Paulo BarrosBottino, Marco Antonio [UNESP]Cesar, Paulo FranciscoDe Melo, Renata Marques [UNESP]2018-12-11T17:29:08Z2018-12-11T17:29:08Z2016-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article870-878application/pdfhttp://dx.doi.org/10.1016/j.dental.2016.03.018Dental Materials, v. 32, n. 7, p. 870-878, 2016.0109-5641http://hdl.handle.net/11449/17817110.1016/j.dental.2016.03.0182-s2.0-849794931312-s2.0-84979493131.pdf9234456003563666Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengDental Materials2,106info:eu-repo/semantics/openAccess2023-10-09T06:04:44Zoai:repositorio.unesp.br:11449/178171Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:26:11.951759Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Microstructure characterization and SCG of newly engineered dental ceramics |
title |
Microstructure characterization and SCG of newly engineered dental ceramics |
spellingShingle |
Microstructure characterization and SCG of newly engineered dental ceramics Ramos, Nathália De Carvalho [UNESP] Ceramics Computer-aided design Dental porcelain Flexural strength Glass ceramics Spectroscopy Stress corrosion Subcritical crack growth Young's modulus |
title_short |
Microstructure characterization and SCG of newly engineered dental ceramics |
title_full |
Microstructure characterization and SCG of newly engineered dental ceramics |
title_fullStr |
Microstructure characterization and SCG of newly engineered dental ceramics |
title_full_unstemmed |
Microstructure characterization and SCG of newly engineered dental ceramics |
title_sort |
Microstructure characterization and SCG of newly engineered dental ceramics |
author |
Ramos, Nathália De Carvalho [UNESP] |
author_facet |
Ramos, Nathália De Carvalho [UNESP] Campos, Tiago Moreira Bastos Paz, Igor Siqueira De La [UNESP] MacHado, João Paulo Barros Bottino, Marco Antonio [UNESP] Cesar, Paulo Francisco De Melo, Renata Marques [UNESP] |
author_role |
author |
author2 |
Campos, Tiago Moreira Bastos Paz, Igor Siqueira De La [UNESP] MacHado, João Paulo Barros Bottino, Marco Antonio [UNESP] Cesar, Paulo Francisco De Melo, Renata Marques [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Aeronautics Technological Institute (ITA) Laboratory of Sensors and Materials Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Ramos, Nathália De Carvalho [UNESP] Campos, Tiago Moreira Bastos Paz, Igor Siqueira De La [UNESP] MacHado, João Paulo Barros Bottino, Marco Antonio [UNESP] Cesar, Paulo Francisco De Melo, Renata Marques [UNESP] |
dc.subject.por.fl_str_mv |
Ceramics Computer-aided design Dental porcelain Flexural strength Glass ceramics Spectroscopy Stress corrosion Subcritical crack growth Young's modulus |
topic |
Ceramics Computer-aided design Dental porcelain Flexural strength Glass ceramics Spectroscopy Stress corrosion Subcritical crack growth Young's modulus |
description |
Objectives The aim of this study was to characterize the microstructure of four dental CAD-CAM ceramics and evaluate their susceptibility to stress corrosion. Methods SEM and EDS were performed for microstructural characterization. For evaluation of the pattern of crystallization of the ceramics and the molecular composition, XRD and FTIR, respectively, were used. Elastic modulus, Poisson's ratio, density and fracture toughness were also measured. The specimens were subjected to biaxial flexure under five stress rates (0.006, 0.06, 0.6, 6 and 60 MPa/s) to determine the subcritical crack growth parameters (n and D). Twenty-five specimens were further tested in mineral oil for determination of Weibull parameters. Two hundred forty ceramic discs (12 mm diameter and 1.2 mm thick) were made from four ceramics: feldspathic ceramic - FEL (Vita Mark II, Vita Zahnfabrik), ceramic-infiltrated polymer - PIC (Vita Enamic, Vita Zahnfabrik), lithium disilicate - LD (IPS e.max CAD, Ivoclar Vivadent) and zirconia-reinforced lithium silicate - LS (Vita Suprinity, Vita Zahnfabrik). Results PIC discs presented organic and inorganic phases (n = 29.1 ± 7.7) and Weibull modulus (m) of 8.96. The FEL discs showed n = 36.6 ± 6.8 and m = 8.02. The LD discs showed a structure with needle-like disilicate grains in a glassy matrix and had the lowest value of n (8.4 ± 0.8) and m = 6.19. The ZLS discs showed similar rod-like grains, n = 11.2 ± 1.4 and m = 9.98. Significance The FEL and PIC discs showed the lowest susceptibility to slow crack growth (SCG), whereas the LD and ZLS discs presented the highest. PIC presented the lowest elastic modulus and no crystals in its composition, while ZLS presented tetragonal zirconia. The overall strength and SCG of the new materials did not benefit from the additional phase or microconstituents present in them. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07-01 2018-12-11T17:29:08Z 2018-12-11T17:29:08Z |
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.dental.2016.03.018 Dental Materials, v. 32, n. 7, p. 870-878, 2016. 0109-5641 http://hdl.handle.net/11449/178171 10.1016/j.dental.2016.03.018 2-s2.0-84979493131 2-s2.0-84979493131.pdf 9234456003563666 |
url |
http://dx.doi.org/10.1016/j.dental.2016.03.018 http://hdl.handle.net/11449/178171 |
identifier_str_mv |
Dental Materials, v. 32, n. 7, p. 870-878, 2016. 0109-5641 10.1016/j.dental.2016.03.018 2-s2.0-84979493131 2-s2.0-84979493131.pdf 9234456003563666 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Dental Materials 2,106 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
870-878 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_ |
1808128360320073728 |