Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.dental.2015.04.019 http://hdl.handle.net/11449/160863 |
Resumo: | Objectives, to evaluate the influence of the occlusal resin cement thickness on the cyclic loads-to-failure of feldspathic crowns and to compare the results to data from monotonic tests. A large range of cement thickness (50 mu m and 500 mu m) was tested, in order to better measure the influence of this variable. Methods. Feldspathic ceramic crowns (Vita Mark II blocks, Vita Zahnfabrik) were bonded to dentin analog dies (G10 (NEMA grade G10, International Paper), with occlusal resin cement thicknesses of 50 mu m and 500 mu m (Multilink Automix, Ivoclar). The dies were prepared with microchannels for water transport to the cement layer. After 96-h water storage, the specimens (n=20) were submitted to cyclic loads (500,000 cycles at 20 Hz; initial maximum load = 40% of monotonic load, from previous data) following a staircase sensitivity design (step size = 25 N). Failure loads at 500,000 cycles were compared to monotonic failure loads (from a previous study with specimens produced by the same author, using the same materials, specimen configuration and cementation protocol). Results. Crowns with an occlusal cement layer of 50 mu m were more resistant than those cemented with 500 mu m (246.4 +/- 22.9 N vs. 158.9 +/- 22.9 N), under wet cyclic testing conditions (p < 0.001). The fatigue failure loads were reduced compared to monotonic loads: to 37% of monotonic for SO mu m; to 53% of monotonic for 500 mu m. Significance. An occlusal cement thickness of 50 mu m was more favorable for the structural performance of feldspathic crowns than was 500 mu m. Cyclic fatigue reduced failure loads well below those found under monotonic loading. (C) 2015 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved. |
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Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crownsCeramicCrownsCement thicknessFailure loadFatigueObjectives, to evaluate the influence of the occlusal resin cement thickness on the cyclic loads-to-failure of feldspathic crowns and to compare the results to data from monotonic tests. A large range of cement thickness (50 mu m and 500 mu m) was tested, in order to better measure the influence of this variable. Methods. Feldspathic ceramic crowns (Vita Mark II blocks, Vita Zahnfabrik) were bonded to dentin analog dies (G10 (NEMA grade G10, International Paper), with occlusal resin cement thicknesses of 50 mu m and 500 mu m (Multilink Automix, Ivoclar). The dies were prepared with microchannels for water transport to the cement layer. After 96-h water storage, the specimens (n=20) were submitted to cyclic loads (500,000 cycles at 20 Hz; initial maximum load = 40% of monotonic load, from previous data) following a staircase sensitivity design (step size = 25 N). Failure loads at 500,000 cycles were compared to monotonic failure loads (from a previous study with specimens produced by the same author, using the same materials, specimen configuration and cementation protocol). Results. Crowns with an occlusal cement layer of 50 mu m were more resistant than those cemented with 500 mu m (246.4 +/- 22.9 N vs. 158.9 +/- 22.9 N), under wet cyclic testing conditions (p < 0.001). The fatigue failure loads were reduced compared to monotonic loads: to 37% of monotonic for SO mu m; to 53% of monotonic for 500 mu m. Significance. An occlusal cement thickness of 50 mu m was more favorable for the structural performance of feldspathic crowns than was 500 mu m. Cyclic fatigue reduced failure loads well below those found under monotonic loading. (C) 2015 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.Univ Fed Santa Maria, Dept Restorat Dent, BR-97119900 Santa Maria, RS, BrazilUniv Connecticut, Ctr Hlth, Reconstruct Sci, Farmington, CT USASao Paulo State Univ, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, BrazilIvoclar Vivadent Inc, Div Res, Amherst, NY USASao Paulo State Univ, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, BrazilElsevier B.V.Universidade Federal de Sergipe (UFS)Univ ConnecticutUniversidade Estadual Paulista (Unesp)Ivoclar Vivadent IncMay, Liliana GresslerKelly, J. RobertBottino, Marco Antonio [UNESP]Hill, Tom2018-11-26T16:17:03Z2018-11-26T16:17:03Z2015-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article895-900application/pdfhttp://dx.doi.org/10.1016/j.dental.2015.04.019Dental Materials. Oxford: Elsevier Sci Ltd, v. 31, n. 8, p. 895-900, 2015.0109-5641http://hdl.handle.net/11449/16086310.1016/j.dental.2015.04.019WOS:000361842600007WOS000361842600007.pdf9234456003563666Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengDental Materials2,106info:eu-repo/semantics/openAccess2023-12-12T06:18:43Zoai:repositorio.unesp.br:11449/160863Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:07:32.102685Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
title |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
spellingShingle |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns May, Liliana Gressler Ceramic Crowns Cement thickness Failure load Fatigue |
title_short |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
title_full |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
title_fullStr |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
title_full_unstemmed |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
title_sort |
Influence of the resin cement thickness on the fatigue failure loads of CAD/CAM feldspathic crowns |
author |
May, Liliana Gressler |
author_facet |
May, Liliana Gressler Kelly, J. Robert Bottino, Marco Antonio [UNESP] Hill, Tom |
author_role |
author |
author2 |
Kelly, J. Robert Bottino, Marco Antonio [UNESP] Hill, Tom |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Sergipe (UFS) Univ Connecticut Universidade Estadual Paulista (Unesp) Ivoclar Vivadent Inc |
dc.contributor.author.fl_str_mv |
May, Liliana Gressler Kelly, J. Robert Bottino, Marco Antonio [UNESP] Hill, Tom |
dc.subject.por.fl_str_mv |
Ceramic Crowns Cement thickness Failure load Fatigue |
topic |
Ceramic Crowns Cement thickness Failure load Fatigue |
description |
Objectives, to evaluate the influence of the occlusal resin cement thickness on the cyclic loads-to-failure of feldspathic crowns and to compare the results to data from monotonic tests. A large range of cement thickness (50 mu m and 500 mu m) was tested, in order to better measure the influence of this variable. Methods. Feldspathic ceramic crowns (Vita Mark II blocks, Vita Zahnfabrik) were bonded to dentin analog dies (G10 (NEMA grade G10, International Paper), with occlusal resin cement thicknesses of 50 mu m and 500 mu m (Multilink Automix, Ivoclar). The dies were prepared with microchannels for water transport to the cement layer. After 96-h water storage, the specimens (n=20) were submitted to cyclic loads (500,000 cycles at 20 Hz; initial maximum load = 40% of monotonic load, from previous data) following a staircase sensitivity design (step size = 25 N). Failure loads at 500,000 cycles were compared to monotonic failure loads (from a previous study with specimens produced by the same author, using the same materials, specimen configuration and cementation protocol). Results. Crowns with an occlusal cement layer of 50 mu m were more resistant than those cemented with 500 mu m (246.4 +/- 22.9 N vs. 158.9 +/- 22.9 N), under wet cyclic testing conditions (p < 0.001). The fatigue failure loads were reduced compared to monotonic loads: to 37% of monotonic for SO mu m; to 53% of monotonic for 500 mu m. Significance. An occlusal cement thickness of 50 mu m was more favorable for the structural performance of feldspathic crowns than was 500 mu m. Cyclic fatigue reduced failure loads well below those found under monotonic loading. (C) 2015 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-01 2018-11-26T16:17:03Z 2018-11-26T16:17:03Z |
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.dental.2015.04.019 Dental Materials. Oxford: Elsevier Sci Ltd, v. 31, n. 8, p. 895-900, 2015. 0109-5641 http://hdl.handle.net/11449/160863 10.1016/j.dental.2015.04.019 WOS:000361842600007 WOS000361842600007.pdf 9234456003563666 |
url |
http://dx.doi.org/10.1016/j.dental.2015.04.019 http://hdl.handle.net/11449/160863 |
identifier_str_mv |
Dental Materials. Oxford: Elsevier Sci Ltd, v. 31, n. 8, p. 895-900, 2015. 0109-5641 10.1016/j.dental.2015.04.019 WOS:000361842600007 WOS000361842600007.pdf 9234456003563666 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Dental Materials 2,106 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
895-900 application/pdf |
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_ |
1808129162516365312 |