Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
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=S0103-64402016000400468 |
Resumo: | Abstract This study evaluated the effect of grinding protocols and resintering on flexural fatigue limit and surface characterization of LavaTM Y-TZP. Bar-shaped specimens (20×4.0×1.2 mm, n=40; 20×4.0×1.5 mm, n=80) were obtained. Half of the thinner specimens (1.2 mm) constituted the as-sintered group (AS), while the thicker ones (1.5 mm) were ground with diamond burs under irrigation (WG) or not (G). The other half of thinner and half of ground specimens were resintered (1000 ºC, 30 min), forming the groups ASR, WGR and GR. Fatigue limit (500,000 cycles, 10 Hz) was evaluated by staircase method in a 4-point flexural fixture. Data were analyzed by 2-way ANOVA and Tukey's test (α=0.05). Surface topography (n=3) and fracture area (n=3) were evaluated by SEM. X-ray diffraction data (n=1) was analyzed by Rietveld refinement. ANOVA revealed significant differences (p<0.001) for the grinding protocol, resintering and their interaction. Grinding increased the fatigue limit of non-resintered groups. There was no significant difference among the resintered groups. Resintering significantly increased the fatigue limit of the AS group only. Both protocols created evident grooves on zirconia surface. The failures initiated at the tensile side of all specimens. The percentages (wt%) of monoclinic phase were AS (8.6), ASR (1.2), G (1.8), GR (0.0), WG (8.2), WGR (0.0) before, and AS (7.4), ASR (6.5), G (3.2), GR (0.2), WG (4.6), WGR (1.1) after cyclic loading. Grinding increased the fatigue limit of non-resintered Y-TZP and formed evident grooves on its surface. Resintering provided significant increase in the fatigue limit of as-sintered specimens. In general, grinding and resintering decreased or zeroed the monoclinic phase. |
id |
FUNORP-1_c2593d787ac8a2fe86495fa6ea6a7dcd |
---|---|
oai_identifier_str |
oai:scielo:S0103-64402016000400468 |
network_acronym_str |
FUNORP-1 |
network_name_str |
Brazilian Dental Journal |
repository_id_str |
|
spelling |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramiczirconiafatigue limitstaircase methodgrindingresinteringAbstract This study evaluated the effect of grinding protocols and resintering on flexural fatigue limit and surface characterization of LavaTM Y-TZP. Bar-shaped specimens (20×4.0×1.2 mm, n=40; 20×4.0×1.5 mm, n=80) were obtained. Half of the thinner specimens (1.2 mm) constituted the as-sintered group (AS), while the thicker ones (1.5 mm) were ground with diamond burs under irrigation (WG) or not (G). The other half of thinner and half of ground specimens were resintered (1000 ºC, 30 min), forming the groups ASR, WGR and GR. Fatigue limit (500,000 cycles, 10 Hz) was evaluated by staircase method in a 4-point flexural fixture. Data were analyzed by 2-way ANOVA and Tukey's test (α=0.05). Surface topography (n=3) and fracture area (n=3) were evaluated by SEM. X-ray diffraction data (n=1) was analyzed by Rietveld refinement. ANOVA revealed significant differences (p<0.001) for the grinding protocol, resintering and their interaction. Grinding increased the fatigue limit of non-resintered groups. There was no significant difference among the resintered groups. Resintering significantly increased the fatigue limit of the AS group only. Both protocols created evident grooves on zirconia surface. The failures initiated at the tensile side of all specimens. The percentages (wt%) of monoclinic phase were AS (8.6), ASR (1.2), G (1.8), GR (0.0), WG (8.2), WGR (0.0) before, and AS (7.4), ASR (6.5), G (3.2), GR (0.2), WG (4.6), WGR (1.1) after cyclic loading. Grinding increased the fatigue limit of non-resintered Y-TZP and formed evident grooves on its surface. Resintering provided significant increase in the fatigue limit of as-sintered specimens. In general, grinding and resintering decreased or zeroed the monoclinic phase.Fundação Odontológica de Ribeirão Preto2016-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402016000400468Brazilian Dental Journal v.27 n.4 2016reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/0103-6440201600801info:eu-repo/semantics/openAccessPolli,Gabriela ScatimburgoHatanaka,Gabriel RodriguesAbi-Rached,Filipe de OliveiraPinelli,Lígia Antunes PereiraGóes,Márcio de SousaCesar,Paulo FranciscoReis,José Maurício dos Santos Nuneseng2016-09-20T00:00:00Zoai:scielo:S0103-64402016000400468Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2016-09-20T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false |
dc.title.none.fl_str_mv |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
title |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
spellingShingle |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic Polli,Gabriela Scatimburgo zirconia fatigue limit staircase method grinding resintering |
title_short |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
title_full |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
title_fullStr |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
title_full_unstemmed |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
title_sort |
Effect of Grinding and Resintering on the Fatigue Limit and Surface Characterization of a Y-TZP Ceramic |
author |
Polli,Gabriela Scatimburgo |
author_facet |
Polli,Gabriela Scatimburgo Hatanaka,Gabriel Rodrigues Abi-Rached,Filipe de Oliveira Pinelli,Lígia Antunes Pereira Góes,Márcio de Sousa Cesar,Paulo Francisco Reis,José Maurício dos Santos Nunes |
author_role |
author |
author2 |
Hatanaka,Gabriel Rodrigues Abi-Rached,Filipe de Oliveira Pinelli,Lígia Antunes Pereira Góes,Márcio de Sousa Cesar,Paulo Francisco Reis,José Maurício dos Santos Nunes |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Polli,Gabriela Scatimburgo Hatanaka,Gabriel Rodrigues Abi-Rached,Filipe de Oliveira Pinelli,Lígia Antunes Pereira Góes,Márcio de Sousa Cesar,Paulo Francisco Reis,José Maurício dos Santos Nunes |
dc.subject.por.fl_str_mv |
zirconia fatigue limit staircase method grinding resintering |
topic |
zirconia fatigue limit staircase method grinding resintering |
description |
Abstract This study evaluated the effect of grinding protocols and resintering on flexural fatigue limit and surface characterization of LavaTM Y-TZP. Bar-shaped specimens (20×4.0×1.2 mm, n=40; 20×4.0×1.5 mm, n=80) were obtained. Half of the thinner specimens (1.2 mm) constituted the as-sintered group (AS), while the thicker ones (1.5 mm) were ground with diamond burs under irrigation (WG) or not (G). The other half of thinner and half of ground specimens were resintered (1000 ºC, 30 min), forming the groups ASR, WGR and GR. Fatigue limit (500,000 cycles, 10 Hz) was evaluated by staircase method in a 4-point flexural fixture. Data were analyzed by 2-way ANOVA and Tukey's test (α=0.05). Surface topography (n=3) and fracture area (n=3) were evaluated by SEM. X-ray diffraction data (n=1) was analyzed by Rietveld refinement. ANOVA revealed significant differences (p<0.001) for the grinding protocol, resintering and their interaction. Grinding increased the fatigue limit of non-resintered groups. There was no significant difference among the resintered groups. Resintering significantly increased the fatigue limit of the AS group only. Both protocols created evident grooves on zirconia surface. The failures initiated at the tensile side of all specimens. The percentages (wt%) of monoclinic phase were AS (8.6), ASR (1.2), G (1.8), GR (0.0), WG (8.2), WGR (0.0) before, and AS (7.4), ASR (6.5), G (3.2), GR (0.2), WG (4.6), WGR (1.1) after cyclic loading. Grinding increased the fatigue limit of non-resintered Y-TZP and formed evident grooves on its surface. Resintering provided significant increase in the fatigue limit of as-sintered specimens. In general, grinding and resintering decreased or zeroed the monoclinic phase. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-08-01 |
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=S0103-64402016000400468 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402016000400468 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-6440201600801 |
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.27 n.4 2016 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_ |
1754204094348656640 |