Influence of CAD-CAM milling on the flexural strength of Y-TZP dental 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.ceramint.2019.02.078 http://hdl.handle.net/11449/187409 |
Resumo: | In this work, the influence of milling strategy and cutter wear on the flexural strength of sintered Y-TZP ceramics machined in a CAD-CAM system, was investigated. Pre-sintered Y-TZP blocks were machined with tungsten carbide (WC) milling cutters and divided into three groups: a) samples machined with New Cutting Tools (NCT); b) samples machined with End-of-life cutting tools (ELCT); and c) samples machined and subsequently polished. The samples were machined parallel and perpendicularly to the diameter of pre-sintered Y-TZP blocks aiming to evaluate the effect of the machining orientation on roughness. After cutting, the specimens were sintered at 1530 °C for 2 h and characterized. After sintering, dense Y-TZP samples presenting grain size average of 0.81 ± 0.23 μm, hardness of 1205 ± 12 HV, K C of 7.7 ± 0.4 MPam 1/2 and flexural strength of 1207 ± 199 MPa were obtained. Furthermore, the control roughness (polished surfaces) presented R a = 0.058 ± 0.011 μm. The surface roughness of the samples was influenced by the machining methodology using NCT mills, with R a = 0.386 ± 0.149 μm and R a = 0.292 ± 0.105 μm for samples machined parallel and perpendicularly to the pre-sintered Y-TZP blocks, respectively. The use of ELCT led to a roughness increasing (R a = 0.582 ± 0.183 μm for samples milled perpendicularly, and R a = 0.919 ± 0.164 μm for samples cut parallel to the pre-sintered blocks. The flexural strength of the sintered Y-TZP decreases with use of ELCT as consequence of surface roughness increasing, resulting from wear of WC mills, which presented chippings with sizes ranging from 30 to 340 μm in the cutting edge. |
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Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramicsCAD-CAM machiningFlexural strengthMilling cuttersRoughnessY-TZP dental ceramicsIn this work, the influence of milling strategy and cutter wear on the flexural strength of sintered Y-TZP ceramics machined in a CAD-CAM system, was investigated. Pre-sintered Y-TZP blocks were machined with tungsten carbide (WC) milling cutters and divided into three groups: a) samples machined with New Cutting Tools (NCT); b) samples machined with End-of-life cutting tools (ELCT); and c) samples machined and subsequently polished. The samples were machined parallel and perpendicularly to the diameter of pre-sintered Y-TZP blocks aiming to evaluate the effect of the machining orientation on roughness. After cutting, the specimens were sintered at 1530 °C for 2 h and characterized. After sintering, dense Y-TZP samples presenting grain size average of 0.81 ± 0.23 μm, hardness of 1205 ± 12 HV, K C of 7.7 ± 0.4 MPam 1/2 and flexural strength of 1207 ± 199 MPa were obtained. Furthermore, the control roughness (polished surfaces) presented R a = 0.058 ± 0.011 μm. The surface roughness of the samples was influenced by the machining methodology using NCT mills, with R a = 0.386 ± 0.149 μm and R a = 0.292 ± 0.105 μm for samples machined parallel and perpendicularly to the pre-sintered Y-TZP blocks, respectively. The use of ELCT led to a roughness increasing (R a = 0.582 ± 0.183 μm for samples milled perpendicularly, and R a = 0.919 ± 0.164 μm for samples cut parallel to the pre-sintered blocks. The flexural strength of the sintered Y-TZP decreases with use of ELCT as consequence of surface roughness increasing, resulting from wear of WC mills, which presented chippings with sizes ranging from 30 to 340 μm in the cutting edge.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Universidade do Estado do Rio de Janeiro - Faculdade de Tecnologia de Resende UERJ-FAT, Rodovia Presidente Dutra, km 298Universidade Estadual Paulista - Faculdade de Engenharia de Guaratinguetá UNESP/FEG, Av. Ariberto Pereira da Cunha, 333, Portal das ColinasCentro Universitário de Volta Redonda - UniFOA, Av. Paulo Erlei Alves Abrantes, 1325 - Três PoçosInstituto Militar de Engenharia Materials Science Department, Pça Gen. Tibúrcio, 80, Praia VermelhaUniversidade Estadual Paulista - Faculdade de Engenharia de Guaratinguetá UNESP/FEG, Av. Ariberto Pereira da Cunha, 333, Portal das ColinasCNPq: n° 311119/2017-4FAPERJ: n° E26-201.476/2014Universidade do Estado do Rio de Janeiro (UERJ)Universidade Estadual Paulista (Unesp)Centro Universitário de Volta Redonda - UniFOAMaterials Science DepartmentSantos, Claudinei dosSimba, Bruno Galvão [UNESP]Silva, Ronaldo ReisRodrigues Pais Alves, Manuel FellipeMagnago, Roberto OliveiraElias, Carlos Nelson2019-10-06T15:35:15Z2019-10-06T15:35:15Z2019-06-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10250-10259http://dx.doi.org/10.1016/j.ceramint.2019.02.078Ceramics International, v. 45, n. 8, p. 10250-10259, 2019.0272-8842http://hdl.handle.net/11449/18740910.1016/j.ceramint.2019.02.0782-s2.0-85062233775Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics Internationalinfo:eu-repo/semantics/openAccess2021-10-23T19:02:02Zoai:repositorio.unesp.br:11449/187409Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:58:35.482723Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
title |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
spellingShingle |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics Santos, Claudinei dos CAD-CAM machining Flexural strength Milling cutters Roughness Y-TZP dental ceramics |
title_short |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
title_full |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
title_fullStr |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
title_full_unstemmed |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
title_sort |
Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics |
author |
Santos, Claudinei dos |
author_facet |
Santos, Claudinei dos Simba, Bruno Galvão [UNESP] Silva, Ronaldo Reis Rodrigues Pais Alves, Manuel Fellipe Magnago, Roberto Oliveira Elias, Carlos Nelson |
author_role |
author |
author2 |
Simba, Bruno Galvão [UNESP] Silva, Ronaldo Reis Rodrigues Pais Alves, Manuel Fellipe Magnago, Roberto Oliveira Elias, Carlos Nelson |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Estado do Rio de Janeiro (UERJ) Universidade Estadual Paulista (Unesp) Centro Universitário de Volta Redonda - UniFOA Materials Science Department |
dc.contributor.author.fl_str_mv |
Santos, Claudinei dos Simba, Bruno Galvão [UNESP] Silva, Ronaldo Reis Rodrigues Pais Alves, Manuel Fellipe Magnago, Roberto Oliveira Elias, Carlos Nelson |
dc.subject.por.fl_str_mv |
CAD-CAM machining Flexural strength Milling cutters Roughness Y-TZP dental ceramics |
topic |
CAD-CAM machining Flexural strength Milling cutters Roughness Y-TZP dental ceramics |
description |
In this work, the influence of milling strategy and cutter wear on the flexural strength of sintered Y-TZP ceramics machined in a CAD-CAM system, was investigated. Pre-sintered Y-TZP blocks were machined with tungsten carbide (WC) milling cutters and divided into three groups: a) samples machined with New Cutting Tools (NCT); b) samples machined with End-of-life cutting tools (ELCT); and c) samples machined and subsequently polished. The samples were machined parallel and perpendicularly to the diameter of pre-sintered Y-TZP blocks aiming to evaluate the effect of the machining orientation on roughness. After cutting, the specimens were sintered at 1530 °C for 2 h and characterized. After sintering, dense Y-TZP samples presenting grain size average of 0.81 ± 0.23 μm, hardness of 1205 ± 12 HV, K C of 7.7 ± 0.4 MPam 1/2 and flexural strength of 1207 ± 199 MPa were obtained. Furthermore, the control roughness (polished surfaces) presented R a = 0.058 ± 0.011 μm. The surface roughness of the samples was influenced by the machining methodology using NCT mills, with R a = 0.386 ± 0.149 μm and R a = 0.292 ± 0.105 μm for samples machined parallel and perpendicularly to the pre-sintered Y-TZP blocks, respectively. The use of ELCT led to a roughness increasing (R a = 0.582 ± 0.183 μm for samples milled perpendicularly, and R a = 0.919 ± 0.164 μm for samples cut parallel to the pre-sintered blocks. The flexural strength of the sintered Y-TZP decreases with use of ELCT as consequence of surface roughness increasing, resulting from wear of WC mills, which presented chippings with sizes ranging from 30 to 340 μm in the cutting edge. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T15:35:15Z 2019-10-06T15:35:15Z 2019-06-01 |
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.ceramint.2019.02.078 Ceramics International, v. 45, n. 8, p. 10250-10259, 2019. 0272-8842 http://hdl.handle.net/11449/187409 10.1016/j.ceramint.2019.02.078 2-s2.0-85062233775 |
url |
http://dx.doi.org/10.1016/j.ceramint.2019.02.078 http://hdl.handle.net/11449/187409 |
identifier_str_mv |
Ceramics International, v. 45, n. 8, p. 10250-10259, 2019. 0272-8842 10.1016/j.ceramint.2019.02.078 2-s2.0-85062233775 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramics International |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
10250-10259 |
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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1808128588087558144 |