Influence of CAD-CAM milling on the flexural strength of Y-TZP dental ceramics

Detalhes bibliográficos
Autor(a) principal: Santos, Claudinei dos
Data de Publicação: 2019
Outros Autores: Simba, Bruno Galvão [UNESP], Silva, Ronaldo Reis, Rodrigues Pais Alves, Manuel Fellipe, Magnago, Roberto Oliveira, Elias, Carlos Nelson
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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spelling 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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