The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.prosdent.2018.01.030 http://hdl.handle.net/11449/185259 |
Resumo: | Statement of problem. It is unclear whether an extended glaze firing could improve the long-term mechanical performance of densely sintered CAD-CAM ceramics. Purpose. The purpose of this in vitro study was to analyze the effect of an extended glaze firing on the flexural fatigue strength (FFS) of densely sintered milled (hard-machined) leucite-based (LEU) and lithium disilicate-based (DIS) ceramics. Material and methods. Disks were machined from ceramic blocks and divided into 6 groups (n=20) according to the material, LEU or DIS, and to the applied glaze firing: manufacturer-recommended glaze (G group), extended glaze (EG group), and control/no firing (C group). The surface roughness of the disks was measured before and after firing by using a contact profilometer, and data were compared by paired sample tests. Specimens were submitted to fatigue by using the staircase test design in water (piston-on-3 balls; 500 000 cycles, 20 Hz, and sinusoidal loading). Mean (+/- SD) FFS values were then calculated and analyzed by using 1-way analysis of variance and post hoc Tukey test (alpha=.05). Results. Surface roughness did not change after the firing (P>.05). The highest FFS value in both ceramics was obtained after EG firing (LEU-EG=80.52 +/- 6.3 MPa; DIS-EG=147.25 +/- 10.5 MPa), which was statistically superior to G firing (LEU-G=73 +/- 6.8 MPa, P=.003; DIS-G=134.34 +/- 15.6 MPa; P=.023) and C group (LEU-C=61.94 +/- 63 MPa; P<.001; DIS-C=134.13 +/- 17.3 MPa; P=.023). Conclusions. EG firing optimized the biaxial flexural fatigue strength of hard-machined leucite ceramics compared with conventional glaze firing. |
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Repositório Institucional da UNESP |
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2946 |
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The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramicsStatement of problem. It is unclear whether an extended glaze firing could improve the long-term mechanical performance of densely sintered CAD-CAM ceramics. Purpose. The purpose of this in vitro study was to analyze the effect of an extended glaze firing on the flexural fatigue strength (FFS) of densely sintered milled (hard-machined) leucite-based (LEU) and lithium disilicate-based (DIS) ceramics. Material and methods. Disks were machined from ceramic blocks and divided into 6 groups (n=20) according to the material, LEU or DIS, and to the applied glaze firing: manufacturer-recommended glaze (G group), extended glaze (EG group), and control/no firing (C group). The surface roughness of the disks was measured before and after firing by using a contact profilometer, and data were compared by paired sample tests. Specimens were submitted to fatigue by using the staircase test design in water (piston-on-3 balls; 500 000 cycles, 20 Hz, and sinusoidal loading). Mean (+/- SD) FFS values were then calculated and analyzed by using 1-way analysis of variance and post hoc Tukey test (alpha=.05). Results. Surface roughness did not change after the firing (P>.05). The highest FFS value in both ceramics was obtained after EG firing (LEU-EG=80.52 +/- 6.3 MPa; DIS-EG=147.25 +/- 10.5 MPa), which was statistically superior to G firing (LEU-G=73 +/- 6.8 MPa, P=.003; DIS-G=134.34 +/- 15.6 MPa; P=.023) and C group (LEU-C=61.94 +/- 63 MPa; P<.001; DIS-C=134.13 +/- 17.3 MPa; P=.023). Conclusions. EG firing optimized the biaxial flexural fatigue strength of hard-machined leucite ceramics compared with conventional glaze firing.Univ Ctr Serra Gaucha FSG, Fac Dent, Dezoito Forte 2366, BR-95020472 Caxias Do Sul, RS, BrazilUniv Fed Santa Maria, Dept Restorat Dent, Fac Dent, Santa Maria, RS, BrazilSao Paulo State Univ, Dept Restorat Dent, Sao Jose dos Campos Dent Sch, Sao Paulo, BrazilSao Paulo State Univ, Dept Restorat Dent, Sao Jose dos Campos Dent Sch, Sao Paulo, BrazilElsevier B.V.Univ Ctr Serra Gaucha FSGUniversidade Federal de Sergipe (UFS)Universidade Estadual Paulista (Unesp)Aurelio, Iana LamadridProchnow, CatinaGuilardi, Luis FelipeRamos, Gabriela Freitas [UNESP]Bottino, Marco Antonio [UNESP]May, Liliana Gressler2019-10-04T12:33:56Z2019-10-04T12:33:56Z2018-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article755-761http://dx.doi.org/10.1016/j.prosdent.2018.01.030Journal Of Prosthetic Dentistry. New York: Mosby-elsevier, v. 120, n. 5, p. 755-761, 2018.0022-3913http://hdl.handle.net/11449/18525910.1016/j.prosdent.2018.01.030WOS:0004545717000179234456003563666Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Prosthetic Dentistryinfo:eu-repo/semantics/openAccess2021-10-23T04:16:19Zoai:repositorio.unesp.br:11449/185259Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:33:16.441493Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
title |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
spellingShingle |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics Aurelio, Iana Lamadrid |
title_short |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
title_full |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
title_fullStr |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
title_full_unstemmed |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
title_sort |
The effect of extended glaze firing on the flexural fatigue strength of hard-machined ceramics |
author |
Aurelio, Iana Lamadrid |
author_facet |
Aurelio, Iana Lamadrid Prochnow, Catina Guilardi, Luis Felipe Ramos, Gabriela Freitas [UNESP] Bottino, Marco Antonio [UNESP] May, Liliana Gressler |
author_role |
author |
author2 |
Prochnow, Catina Guilardi, Luis Felipe Ramos, Gabriela Freitas [UNESP] Bottino, Marco Antonio [UNESP] May, Liliana Gressler |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Univ Ctr Serra Gaucha FSG Universidade Federal de Sergipe (UFS) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Aurelio, Iana Lamadrid Prochnow, Catina Guilardi, Luis Felipe Ramos, Gabriela Freitas [UNESP] Bottino, Marco Antonio [UNESP] May, Liliana Gressler |
description |
Statement of problem. It is unclear whether an extended glaze firing could improve the long-term mechanical performance of densely sintered CAD-CAM ceramics. Purpose. The purpose of this in vitro study was to analyze the effect of an extended glaze firing on the flexural fatigue strength (FFS) of densely sintered milled (hard-machined) leucite-based (LEU) and lithium disilicate-based (DIS) ceramics. Material and methods. Disks were machined from ceramic blocks and divided into 6 groups (n=20) according to the material, LEU or DIS, and to the applied glaze firing: manufacturer-recommended glaze (G group), extended glaze (EG group), and control/no firing (C group). The surface roughness of the disks was measured before and after firing by using a contact profilometer, and data were compared by paired sample tests. Specimens were submitted to fatigue by using the staircase test design in water (piston-on-3 balls; 500 000 cycles, 20 Hz, and sinusoidal loading). Mean (+/- SD) FFS values were then calculated and analyzed by using 1-way analysis of variance and post hoc Tukey test (alpha=.05). Results. Surface roughness did not change after the firing (P>.05). The highest FFS value in both ceramics was obtained after EG firing (LEU-EG=80.52 +/- 6.3 MPa; DIS-EG=147.25 +/- 10.5 MPa), which was statistically superior to G firing (LEU-G=73 +/- 6.8 MPa, P=.003; DIS-G=134.34 +/- 15.6 MPa; P=.023) and C group (LEU-C=61.94 +/- 63 MPa; P<.001; DIS-C=134.13 +/- 17.3 MPa; P=.023). Conclusions. EG firing optimized the biaxial flexural fatigue strength of hard-machined leucite ceramics compared with conventional glaze firing. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-01 2019-10-04T12:33:56Z 2019-10-04T12:33:56Z |
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.prosdent.2018.01.030 Journal Of Prosthetic Dentistry. New York: Mosby-elsevier, v. 120, n. 5, p. 755-761, 2018. 0022-3913 http://hdl.handle.net/11449/185259 10.1016/j.prosdent.2018.01.030 WOS:000454571700017 9234456003563666 |
url |
http://dx.doi.org/10.1016/j.prosdent.2018.01.030 http://hdl.handle.net/11449/185259 |
identifier_str_mv |
Journal Of Prosthetic Dentistry. New York: Mosby-elsevier, v. 120, n. 5, p. 755-761, 2018. 0022-3913 10.1016/j.prosdent.2018.01.030 WOS:000454571700017 9234456003563666 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Prosthetic Dentistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
755-761 |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science 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 |
|
_version_ |
1808128670329470976 |