Brittleness index and its relationship with materials mechanical properties: Influence on the machinability of CAD/CAM materials
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
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. |
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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 |
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1750318326238674944 |