Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Dental Journal |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402018000500483 |
Resumo: | Abstract It evaluated the effect of aging by Low Temperature Degradation (LTD), executed after post- processing surface treatments (polishing, heat treatment and glazing), on the surface characteristics (micromorphology and roughness) and on the structural stability (phase transformation and mechanical behavior-flexural strength and structural reliability) of a ground yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. Discs of Y-TZP (VITA In-Ceram YZ) were manufactured (ISO:6872-2015; 15 mm in diameter and 1.2 ± 0.2 mm in thickness) and randomly assigned into 10 groups according two factors: “aging” in 2 levels (with or without) and “surface treatment” in 5 levels (Ctrl: as-sintered; Gr: grinding with coarse diamond bur; Gr + HT: grinding plus heat treatment; Gr + Pol: grinding plus polishing; Gr + Gl: grinding plus glazing). Roughness (n=30), biaxial flexural test (n=30), phase transformation (n=2), and surface topography (n=2) analyses were performed. Aging led to an intense increase in monoclinic (m) phase content for all the tested conditions, being the as-sintered samples (Ctrl= 65.6%) more susceptible to the t-m phase transformation. Despite of increasing the m-phase content, aging was not detrimental for characteristic strength (except to the grinding condition). There was no significant reduction in the Weibull modulus after surface treatments. Additionally, heat treatment and glazing after grinding led to a decrease in characteristic strength, while polishing presented the highest characteristic strength values. Thus, polishing is mandatory after grinding the Y-TZP ceramic, while performing glazing or heat-treatment alone after grinding lead to the worst mechanical performance. |
id |
FUNORP-1_510ac5fddae6241bcd667e0a38600d74 |
---|---|
oai_identifier_str |
oai:scielo:S0103-64402018000500483 |
network_acronym_str |
FUNORP-1 |
network_name_str |
Brazilian Dental Journal |
repository_id_str |
|
spelling |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical BehaviorDental ceramicszirconium oxide partially stabilized by yttriumglazingannealinggrinding.Abstract It evaluated the effect of aging by Low Temperature Degradation (LTD), executed after post- processing surface treatments (polishing, heat treatment and glazing), on the surface characteristics (micromorphology and roughness) and on the structural stability (phase transformation and mechanical behavior-flexural strength and structural reliability) of a ground yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. Discs of Y-TZP (VITA In-Ceram YZ) were manufactured (ISO:6872-2015; 15 mm in diameter and 1.2 ± 0.2 mm in thickness) and randomly assigned into 10 groups according two factors: “aging” in 2 levels (with or without) and “surface treatment” in 5 levels (Ctrl: as-sintered; Gr: grinding with coarse diamond bur; Gr + HT: grinding plus heat treatment; Gr + Pol: grinding plus polishing; Gr + Gl: grinding plus glazing). Roughness (n=30), biaxial flexural test (n=30), phase transformation (n=2), and surface topography (n=2) analyses were performed. Aging led to an intense increase in monoclinic (m) phase content for all the tested conditions, being the as-sintered samples (Ctrl= 65.6%) more susceptible to the t-m phase transformation. Despite of increasing the m-phase content, aging was not detrimental for characteristic strength (except to the grinding condition). There was no significant reduction in the Weibull modulus after surface treatments. Additionally, heat treatment and glazing after grinding led to a decrease in characteristic strength, while polishing presented the highest characteristic strength values. Thus, polishing is mandatory after grinding the Y-TZP ceramic, while performing glazing or heat-treatment alone after grinding lead to the worst mechanical performance.Fundação Odontológica de Ribeirão Preto2018-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402018000500483Brazilian Dental Journal v.29 n.5 2018reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/0103-6440201802044info:eu-repo/semantics/openAccessZucuni,Camila PauleskiGuilardi,Luis FelipeRippe,Marilia PivettaPereira,Gabriel Kalil RochaValandro,Luiz Felipeeng2018-11-22T00:00:00Zoai:scielo:S0103-64402018000500483Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2018-11-22T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false |
dc.title.none.fl_str_mv |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
title |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
spellingShingle |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior Zucuni,Camila Pauleski Dental ceramics zirconium oxide partially stabilized by yttrium glazing annealing grinding. |
title_short |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
title_full |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
title_fullStr |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
title_full_unstemmed |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
title_sort |
Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior |
author |
Zucuni,Camila Pauleski |
author_facet |
Zucuni,Camila Pauleski Guilardi,Luis Felipe Rippe,Marilia Pivetta Pereira,Gabriel Kalil Rocha Valandro,Luiz Felipe |
author_role |
author |
author2 |
Guilardi,Luis Felipe Rippe,Marilia Pivetta Pereira,Gabriel Kalil Rocha Valandro,Luiz Felipe |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Zucuni,Camila Pauleski Guilardi,Luis Felipe Rippe,Marilia Pivetta Pereira,Gabriel Kalil Rocha Valandro,Luiz Felipe |
dc.subject.por.fl_str_mv |
Dental ceramics zirconium oxide partially stabilized by yttrium glazing annealing grinding. |
topic |
Dental ceramics zirconium oxide partially stabilized by yttrium glazing annealing grinding. |
description |
Abstract It evaluated the effect of aging by Low Temperature Degradation (LTD), executed after post- processing surface treatments (polishing, heat treatment and glazing), on the surface characteristics (micromorphology and roughness) and on the structural stability (phase transformation and mechanical behavior-flexural strength and structural reliability) of a ground yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. Discs of Y-TZP (VITA In-Ceram YZ) were manufactured (ISO:6872-2015; 15 mm in diameter and 1.2 ± 0.2 mm in thickness) and randomly assigned into 10 groups according two factors: “aging” in 2 levels (with or without) and “surface treatment” in 5 levels (Ctrl: as-sintered; Gr: grinding with coarse diamond bur; Gr + HT: grinding plus heat treatment; Gr + Pol: grinding plus polishing; Gr + Gl: grinding plus glazing). Roughness (n=30), biaxial flexural test (n=30), phase transformation (n=2), and surface topography (n=2) analyses were performed. Aging led to an intense increase in monoclinic (m) phase content for all the tested conditions, being the as-sintered samples (Ctrl= 65.6%) more susceptible to the t-m phase transformation. Despite of increasing the m-phase content, aging was not detrimental for characteristic strength (except to the grinding condition). There was no significant reduction in the Weibull modulus after surface treatments. Additionally, heat treatment and glazing after grinding led to a decrease in characteristic strength, while polishing presented the highest characteristic strength values. Thus, polishing is mandatory after grinding the Y-TZP ceramic, while performing glazing or heat-treatment alone after grinding lead to the worst mechanical performance. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-09-01 |
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=S0103-64402018000500483 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402018000500483 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-6440201802044 |
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 |
Fundação Odontológica de Ribeirão Preto |
publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
dc.source.none.fl_str_mv |
Brazilian Dental Journal v.29 n.5 2018 reponame:Brazilian Dental Journal instname:Fundação Odontológica de Ribeirão Preto (FUNORP) instacron:FUNORP |
instname_str |
Fundação Odontológica de Ribeirão Preto (FUNORP) |
instacron_str |
FUNORP |
institution |
FUNORP |
reponame_str |
Brazilian Dental Journal |
collection |
Brazilian Dental Journal |
repository.name.fl_str_mv |
Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP) |
repository.mail.fl_str_mv |
bdj@forp.usp.br||sergio@fosjc.unesp.br |
_version_ |
1754204095296569344 |