Pre-heating mitigates composite degradation
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/10.1590/1678-775720150284 http://hdl.handle.net/11449/161186 |
Resumo: | Dental composites cured at high temperatures show improved properties and higher degrees of conversion; however, there is no information available about the effect of pre-heating on material degradation. Objectives: This study evaluated the effect of pre-heating on the degradation of composites, based on the analysis of radiopacity and silver penetration using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Material and Methods: Thirty specimens were fabricated using a metallic matrix (2x8 mm) and the composites Durafill VS (Heraeus Kulzer),Z-250(3M/ESPE), and Z-350 (3M/ESPE), cured at 25 degrees C (no pre-heating) or 60 degrees C (pre-heating). Specimens were stored sequentially in the following solutions: 1) water for 7 days (60 degrees C), plus 0.1 N sodium hydroxide (NaOH) for 14 days (60 degrees C); 2) 50% silver nitrate (AgNO3) for 10 days (60 degrees C). Specimens were radiographed at baseline and after each storage time, and the images were evaluated in gray scale. After the storage protocol, samples were analyzed using SEM/EDS to check the depth of silver penetration. Radiopacity and silver penetration data were analyzed using ANOVA and Tukey's tests (alpha=5%). Results: Radiopacity levels were as follows: Durafill VS<Z-350<Z-250 (p<0.05). The depth of silver penetration into the composites ranked as follows: Durafill VS>Z-350>Z-250 (p<0.05). After storage in water/NaOH, pre-heated specimens presented higher radiopacity values than non-pre-heated specimens (p<0.05). There was a lower penetration of silver in pre-heated specimens (p<0.05). Conclusions: Pre-heating at 60 degrees C mitigated the degradation of composites based on analysis of radiopacity and silver penetration depth. |
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Pre-heating mitigates composite degradationComposite resinsHot temperatureRadiographySilver nitrateScanning electron microscopyDental composites cured at high temperatures show improved properties and higher degrees of conversion; however, there is no information available about the effect of pre-heating on material degradation. Objectives: This study evaluated the effect of pre-heating on the degradation of composites, based on the analysis of radiopacity and silver penetration using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Material and Methods: Thirty specimens were fabricated using a metallic matrix (2x8 mm) and the composites Durafill VS (Heraeus Kulzer),Z-250(3M/ESPE), and Z-350 (3M/ESPE), cured at 25 degrees C (no pre-heating) or 60 degrees C (pre-heating). Specimens were stored sequentially in the following solutions: 1) water for 7 days (60 degrees C), plus 0.1 N sodium hydroxide (NaOH) for 14 days (60 degrees C); 2) 50% silver nitrate (AgNO3) for 10 days (60 degrees C). Specimens were radiographed at baseline and after each storage time, and the images were evaluated in gray scale. After the storage protocol, samples were analyzed using SEM/EDS to check the depth of silver penetration. Radiopacity and silver penetration data were analyzed using ANOVA and Tukey's tests (alpha=5%). Results: Radiopacity levels were as follows: Durafill VS<Z-350<Z-250 (p<0.05). The depth of silver penetration into the composites ranked as follows: Durafill VS>Z-350>Z-250 (p<0.05). After storage in water/NaOH, pre-heated specimens presented higher radiopacity values than non-pre-heated specimens (p<0.05). There was a lower penetration of silver in pre-heated specimens (p<0.05). Conclusions: Pre-heating at 60 degrees C mitigated the degradation of composites based on analysis of radiopacity and silver penetration depth.Graduate and Research Vice-Rectory of Paulista University - UNIPUniv Paulista, Fac Odontol, Inst Ciencias Saude, Mat Dent & Dent, Goiania, Go, BrazilUniv Paulista, Fac Odontol, Inst Ciencias Saude, Radiol Oral, Goiania, Go, BrazilUniv Estadual Paulista, Fac Odontol, Dept Mat Dent & Protese, Araraquara, SP, BrazilUniv Fed Goias, Fac Odontol, Dept Ciencias Estomatol, Goiania, Go, BrazilFac Uniao Goyazes, Curso Odontol, Dent, Trindade, Go, BrazilUniv Estadual Paulista, Fac Odontol, Dept Mat Dent & Protese, Araraquara, SP, BrazilGraduate and Research Vice-Rectory of Paulista University - UNIP: 07 02 937Univ Sao Paulo Fac Odontologia BauruUniv PaulistaUniversidade Estadual Paulista (Unesp)Universidade Federal de Goiás (UFG)Fac Uniao GoyazesSilva, Jessika Calixto daReges, Rogerio VieiraCosta Rege, Inara CarneiroSantos Cruz, Carlos Alberto dos [UNESP]Vaz, Luis Geraldo [UNESP]Estrela, CarlosAlves de Castro, Fabricio Luscino2018-11-26T16:19:28Z2018-11-26T16:19:28Z2015-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article571-579application/pdfhttp://dx.doi.org/10.1590/1678-775720150284Journal Of Applied Oral Science. Bauru-sp: Univ Sao Paulo Fac Odontologia Bauru, v. 23, n. 6, p. 571-579, 2015.1678-7757http://hdl.handle.net/11449/16118610.1590/1678-775720150284S1678-77572015000600571WOS:000369500000005S1678-77572015000600571.pdf8547747556446020Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Applied Oral Science0,645info:eu-repo/semantics/openAccess2023-12-14T06:17:08Zoai:repositorio.unesp.br:11449/161186Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:16:36.203958Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Pre-heating mitigates composite degradation |
title |
Pre-heating mitigates composite degradation |
spellingShingle |
Pre-heating mitigates composite degradation Silva, Jessika Calixto da Composite resins Hot temperature Radiography Silver nitrate Scanning electron microscopy |
title_short |
Pre-heating mitigates composite degradation |
title_full |
Pre-heating mitigates composite degradation |
title_fullStr |
Pre-heating mitigates composite degradation |
title_full_unstemmed |
Pre-heating mitigates composite degradation |
title_sort |
Pre-heating mitigates composite degradation |
author |
Silva, Jessika Calixto da |
author_facet |
Silva, Jessika Calixto da Reges, Rogerio Vieira Costa Rege, Inara Carneiro Santos Cruz, Carlos Alberto dos [UNESP] Vaz, Luis Geraldo [UNESP] Estrela, Carlos Alves de Castro, Fabricio Luscino |
author_role |
author |
author2 |
Reges, Rogerio Vieira Costa Rege, Inara Carneiro Santos Cruz, Carlos Alberto dos [UNESP] Vaz, Luis Geraldo [UNESP] Estrela, Carlos Alves de Castro, Fabricio Luscino |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Univ Paulista Universidade Estadual Paulista (Unesp) Universidade Federal de Goiás (UFG) Fac Uniao Goyazes |
dc.contributor.author.fl_str_mv |
Silva, Jessika Calixto da Reges, Rogerio Vieira Costa Rege, Inara Carneiro Santos Cruz, Carlos Alberto dos [UNESP] Vaz, Luis Geraldo [UNESP] Estrela, Carlos Alves de Castro, Fabricio Luscino |
dc.subject.por.fl_str_mv |
Composite resins Hot temperature Radiography Silver nitrate Scanning electron microscopy |
topic |
Composite resins Hot temperature Radiography Silver nitrate Scanning electron microscopy |
description |
Dental composites cured at high temperatures show improved properties and higher degrees of conversion; however, there is no information available about the effect of pre-heating on material degradation. Objectives: This study evaluated the effect of pre-heating on the degradation of composites, based on the analysis of radiopacity and silver penetration using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Material and Methods: Thirty specimens were fabricated using a metallic matrix (2x8 mm) and the composites Durafill VS (Heraeus Kulzer),Z-250(3M/ESPE), and Z-350 (3M/ESPE), cured at 25 degrees C (no pre-heating) or 60 degrees C (pre-heating). Specimens were stored sequentially in the following solutions: 1) water for 7 days (60 degrees C), plus 0.1 N sodium hydroxide (NaOH) for 14 days (60 degrees C); 2) 50% silver nitrate (AgNO3) for 10 days (60 degrees C). Specimens were radiographed at baseline and after each storage time, and the images were evaluated in gray scale. After the storage protocol, samples were analyzed using SEM/EDS to check the depth of silver penetration. Radiopacity and silver penetration data were analyzed using ANOVA and Tukey's tests (alpha=5%). Results: Radiopacity levels were as follows: Durafill VS<Z-350<Z-250 (p<0.05). The depth of silver penetration into the composites ranked as follows: Durafill VS>Z-350>Z-250 (p<0.05). After storage in water/NaOH, pre-heated specimens presented higher radiopacity values than non-pre-heated specimens (p<0.05). There was a lower penetration of silver in pre-heated specimens (p<0.05). Conclusions: Pre-heating at 60 degrees C mitigated the degradation of composites based on analysis of radiopacity and silver penetration depth. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-11-01 2018-11-26T16:19:28Z 2018-11-26T16:19:28Z |
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/10.1590/1678-775720150284 Journal Of Applied Oral Science. Bauru-sp: Univ Sao Paulo Fac Odontologia Bauru, v. 23, n. 6, p. 571-579, 2015. 1678-7757 http://hdl.handle.net/11449/161186 10.1590/1678-775720150284 S1678-77572015000600571 WOS:000369500000005 S1678-77572015000600571.pdf 8547747556446020 |
url |
http://dx.doi.org/10.1590/1678-775720150284 http://hdl.handle.net/11449/161186 |
identifier_str_mv |
Journal Of Applied Oral Science. Bauru-sp: Univ Sao Paulo Fac Odontologia Bauru, v. 23, n. 6, p. 571-579, 2015. 1678-7757 10.1590/1678-775720150284 S1678-77572015000600571 WOS:000369500000005 S1678-77572015000600571.pdf 8547747556446020 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Applied Oral Science 0,645 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
571-579 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Sao Paulo Fac Odontologia Bauru |
publisher.none.fl_str_mv |
Univ Sao Paulo Fac Odontologia Bauru |
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 |
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1808129182396317696 |