Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials

Detalhes bibliográficos
Autor(a) principal: Porto,Thiago Soares
Data de Publicação: 2019
Outros Autores: Roperto,Renato Cassio, Teich,Sorin Theodor, Faddoul,Fady Fouad, Rizzante,Fabio Antonio Piolla, Porto-Neto,Sizenando de Toledo, Campos,Edson Alves de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Oral Research
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100217
Resumo: Abstract: The aim of this study is to evaluate the machinability of four CAD/CAM materials (n = 13) assessed by brittleness index, Vickers hardness, and fracture toughness and interaction among such mechanical properties. The materials selected in this in vitro study are Feldspathic ceramic [FC], Lithium-disilicate glass ceramic [LD], leucite-reinforced glass ceramic [LR], and nanofilled resin material [RN]. Slices were made from the blocks following original dimensions 14 × 12 × 3 mm (L × W × H), using a precision slow-speed saw device and then surfaces were regularized through a polishing device. Brittleness index and fracture toughness were calculated by the use of specific equations for each one of the properties. The Vickers hardness was calculated automated software in the microhardness device. One-way Anova and Pearson's correlation were applied to data evaluation. LD obtained the highest values for brittleness index and was not significantly different from FC. LR presented statistically significant difference compared with RN, which had the lowest mean. Vickers hardness showed LD with the highest average, and no statistical difference was found between FC and LR. RN presented the lowest average. Fracture toughness showed FC and LR not statistically different from each other, likewise LD and RN. The brittleness index, considered also as the machinability of a material, showed within this study as positively dependent on Vickers hardness, which leads to conclusion that hardness of ceramics is related to its milling capacity. In addition, fracture toughness of pre-sintered ceramics is compared to polymer-based materials.
id SBPQO-1_90b6ce57aa346dd45a1dad1eb5310e8d
oai_identifier_str oai:scielo:S1806-83242019000100217
network_acronym_str SBPQO-1
network_name_str Brazilian Oral Research
repository_id_str
spelling Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materialsDental MaterialsPolymersProsthodonticsHardnessAbstract: The aim of this study is to evaluate the machinability of four CAD/CAM materials (n = 13) assessed by brittleness index, Vickers hardness, and fracture toughness and interaction among such mechanical properties. The materials selected in this in vitro study are Feldspathic ceramic [FC], Lithium-disilicate glass ceramic [LD], leucite-reinforced glass ceramic [LR], and nanofilled resin material [RN]. Slices were made from the blocks following original dimensions 14 × 12 × 3 mm (L × W × H), using a precision slow-speed saw device and then surfaces were regularized through a polishing device. Brittleness index and fracture toughness were calculated by the use of specific equations for each one of the properties. The Vickers hardness was calculated automated software in the microhardness device. One-way Anova and Pearson's correlation were applied to data evaluation. LD obtained the highest values for brittleness index and was not significantly different from FC. LR presented statistically significant difference compared with RN, which had the lowest mean. Vickers hardness showed LD with the highest average, and no statistical difference was found between FC and LR. RN presented the lowest average. Fracture toughness showed FC and LR not statistically different from each other, likewise LD and RN. The brittleness index, considered also as the machinability of a material, showed within this study as positively dependent on Vickers hardness, which leads to conclusion that hardness of ceramics is related to its milling capacity. In addition, fracture toughness of pre-sintered ceramics is compared to polymer-based materials.Sociedade Brasileira de Pesquisa Odontológica - SBPqO2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100217Brazilian Oral Research v.33 2019reponame:Brazilian Oral Researchinstname:Sociedade Brasileira de Pesquisa Odontológica (SBPqO)instacron:SBPQO10.1590/1807-3107bor-2019.vol33.0026info:eu-repo/semantics/openAccessPorto,Thiago SoaresRoperto,Renato CassioTeich,Sorin TheodorFaddoul,Fady FouadRizzante,Fabio Antonio PiollaPorto-Neto,Sizenando de ToledoCampos,Edson Alves deeng2019-04-02T00:00:00Zoai:scielo:S1806-83242019000100217Revistahttps://www.scielo.br/j/bor/https://old.scielo.br/oai/scielo-oai.phppob@edu.usp.br||bor@sbpqo.org.br1807-31071806-8324opendoar:2019-04-02T00:00Brazilian Oral Research - Sociedade Brasileira de Pesquisa Odontológica (SBPqO)false
dc.title.none.fl_str_mv Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
title Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
spellingShingle Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
Porto,Thiago Soares
Dental Materials
Polymers
Prosthodontics
Hardness
title_short Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
title_full Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
title_fullStr Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
title_full_unstemmed Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
title_sort Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
author Porto,Thiago Soares
author_facet Porto,Thiago Soares
Roperto,Renato Cassio
Teich,Sorin Theodor
Faddoul,Fady Fouad
Rizzante,Fabio Antonio Piolla
Porto-Neto,Sizenando de Toledo
Campos,Edson Alves de
author_role author
author2 Roperto,Renato Cassio
Teich,Sorin Theodor
Faddoul,Fady Fouad
Rizzante,Fabio Antonio Piolla
Porto-Neto,Sizenando de Toledo
Campos,Edson Alves de
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Porto,Thiago Soares
Roperto,Renato Cassio
Teich,Sorin Theodor
Faddoul,Fady Fouad
Rizzante,Fabio Antonio Piolla
Porto-Neto,Sizenando de Toledo
Campos,Edson Alves de
dc.subject.por.fl_str_mv Dental Materials
Polymers
Prosthodontics
Hardness
topic Dental Materials
Polymers
Prosthodontics
Hardness
description Abstract: The aim of this study is to evaluate the machinability of four CAD/CAM materials (n = 13) assessed by brittleness index, Vickers hardness, and fracture toughness and interaction among such mechanical properties. The materials selected in this in vitro study are Feldspathic ceramic [FC], Lithium-disilicate glass ceramic [LD], leucite-reinforced glass ceramic [LR], and nanofilled resin material [RN]. Slices were made from the blocks following original dimensions 14 × 12 × 3 mm (L × W × H), using a precision slow-speed saw device and then surfaces were regularized through a polishing device. Brittleness index and fracture toughness were calculated by the use of specific equations for each one of the properties. The Vickers hardness was calculated automated software in the microhardness device. One-way Anova and Pearson's correlation were applied to data evaluation. LD obtained the highest values for brittleness index and was not significantly different from FC. LR presented statistically significant difference compared with RN, which had the lowest mean. Vickers hardness showed LD with the highest average, and no statistical difference was found between FC and LR. RN presented the lowest average. Fracture toughness showed FC and LR not statistically different from each other, likewise LD and RN. The brittleness index, considered also as the machinability of a material, showed within this study as positively dependent on Vickers hardness, which leads to conclusion that hardness of ceramics is related to its milling capacity. In addition, fracture toughness of pre-sintered ceramics is compared to polymer-based materials.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100217
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242019000100217
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1807-3107bor-2019.vol33.0026
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Pesquisa Odontológica - SBPqO
publisher.none.fl_str_mv Sociedade Brasileira de Pesquisa Odontológica - SBPqO
dc.source.none.fl_str_mv Brazilian Oral Research v.33 2019
reponame:Brazilian Oral Research
instname:Sociedade Brasileira de Pesquisa Odontológica (SBPqO)
instacron:SBPQO
instname_str Sociedade Brasileira de Pesquisa Odontológica (SBPqO)
instacron_str SBPQO
institution SBPQO
reponame_str Brazilian Oral Research
collection Brazilian Oral Research
repository.name.fl_str_mv Brazilian Oral Research - Sociedade Brasileira de Pesquisa Odontológica (SBPqO)
repository.mail.fl_str_mv pob@edu.usp.br||bor@sbpqo.org.br
_version_ 1750318326238674944