Fracture resistance of weakened roots restored with composite resin and glass fiber post
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/s0103-64402008000400008 http://hdl.handle.net/11449/231197 |
Resumo: | This study evaluated the fracture resistance of weakened roots restored with glass fiber posts, composite resin cores and complete metal crowns. Thirty maxillary canines were randomly divided into 3 groups of 10 teeth each: teeth without weakened roots (control); teeth with partially weakened roots (PWR) and teeth with and largely weakened roots (LWR). The control group was restored with glass fiber posts and a composite resin core. Teeth in the PWR and LWR groups were flared internally to standardized dimensions in order to simulate root weakness. Thereafter, the roots were partially filled with composite resin and restored in the same way as in the control group. The specimens were exposed to 250,000 cycles in a controlled chewing simulator. All intact specimens were subjected to a static load (N) in a universal testing machine at 45 degrees to the long axis of the tooth until failure. Data were analyzed by one-way ANOVA and Dunnett's test for multiple comparisons (p=0.05). There were statistically significant difference differences (p<0.01) among the groups (control group = 566.73 N; PWR = 409.64 N; and LWR = 410.91 N), with significantly higher fracture strength for the control group. There was no statistically significant difference (p>0.05) between the weakened groups. The results of this study showed that thicker root dentin walls significantly increase the fracture resistance of endodontically treated teeth. |
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Repositório Institucional da UNESP |
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Fracture resistance of weakened roots restored with composite resin and glass fiber postComposite resinsFracture strengthPost-and-core techniqueThis study evaluated the fracture resistance of weakened roots restored with glass fiber posts, composite resin cores and complete metal crowns. Thirty maxillary canines were randomly divided into 3 groups of 10 teeth each: teeth without weakened roots (control); teeth with partially weakened roots (PWR) and teeth with and largely weakened roots (LWR). The control group was restored with glass fiber posts and a composite resin core. Teeth in the PWR and LWR groups were flared internally to standardized dimensions in order to simulate root weakness. Thereafter, the roots were partially filled with composite resin and restored in the same way as in the control group. The specimens were exposed to 250,000 cycles in a controlled chewing simulator. All intact specimens were subjected to a static load (N) in a universal testing machine at 45 degrees to the long axis of the tooth until failure. Data were analyzed by one-way ANOVA and Dunnett's test for multiple comparisons (p=0.05). There were statistically significant difference differences (p<0.01) among the groups (control group = 566.73 N; PWR = 409.64 N; and LWR = 410.91 N), with significantly higher fracture strength for the control group. There was no statistically significant difference (p>0.05) between the weakened groups. The results of this study showed that thicker root dentin walls significantly increase the fracture resistance of endodontically treated teeth.Department of Prosthodontics Dental School of São José dos Campos State University of São Paulo, São Jose dos Campos, SPDepartment of Prosthodontics Dental School University of Southern Santa Catarina, Tubarão, SCDepartment of Prosthodontics Dental School of Bauru University of São Paulo, Bauru, SPDepartment of Prosthodontics Amazonas State University, Manaus, AMUniversidade de São Paulo (USP)University of Southern Santa CatarinaAmazonas State UniversityZogheib, Lucas VillaçaPereira, Jefferson Ricardodo Valle, Accácio Linsde Oliveira, Jonas AlvesPegoraro, Luiz Fernando2022-04-29T08:43:58Z2022-04-29T08:43:58Z2008-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article329-333http://dx.doi.org/10.1590/s0103-64402008000400008Brazilian Dental Journal, v. 19, n. 4, p. 329-333, 2008.1806-47600103-6440http://hdl.handle.net/11449/23119710.1590/s0103-644020080004000082-s2.0-63249122986Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Dental Journalinfo:eu-repo/semantics/openAccess2022-04-29T08:43:58Zoai:repositorio.unesp.br:11449/231197Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:35:57.954716Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
title |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
spellingShingle |
Fracture resistance of weakened roots restored with composite resin and glass fiber post Zogheib, Lucas Villaça Composite resins Fracture strength Post-and-core technique |
title_short |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
title_full |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
title_fullStr |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
title_full_unstemmed |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
title_sort |
Fracture resistance of weakened roots restored with composite resin and glass fiber post |
author |
Zogheib, Lucas Villaça |
author_facet |
Zogheib, Lucas Villaça Pereira, Jefferson Ricardo do Valle, Accácio Lins de Oliveira, Jonas Alves Pegoraro, Luiz Fernando |
author_role |
author |
author2 |
Pereira, Jefferson Ricardo do Valle, Accácio Lins de Oliveira, Jonas Alves Pegoraro, Luiz Fernando |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) University of Southern Santa Catarina Amazonas State University |
dc.contributor.author.fl_str_mv |
Zogheib, Lucas Villaça Pereira, Jefferson Ricardo do Valle, Accácio Lins de Oliveira, Jonas Alves Pegoraro, Luiz Fernando |
dc.subject.por.fl_str_mv |
Composite resins Fracture strength Post-and-core technique |
topic |
Composite resins Fracture strength Post-and-core technique |
description |
This study evaluated the fracture resistance of weakened roots restored with glass fiber posts, composite resin cores and complete metal crowns. Thirty maxillary canines were randomly divided into 3 groups of 10 teeth each: teeth without weakened roots (control); teeth with partially weakened roots (PWR) and teeth with and largely weakened roots (LWR). The control group was restored with glass fiber posts and a composite resin core. Teeth in the PWR and LWR groups were flared internally to standardized dimensions in order to simulate root weakness. Thereafter, the roots were partially filled with composite resin and restored in the same way as in the control group. The specimens were exposed to 250,000 cycles in a controlled chewing simulator. All intact specimens were subjected to a static load (N) in a universal testing machine at 45 degrees to the long axis of the tooth until failure. Data were analyzed by one-way ANOVA and Dunnett's test for multiple comparisons (p=0.05). There were statistically significant difference differences (p<0.01) among the groups (control group = 566.73 N; PWR = 409.64 N; and LWR = 410.91 N), with significantly higher fracture strength for the control group. There was no statistically significant difference (p>0.05) between the weakened groups. The results of this study showed that thicker root dentin walls significantly increase the fracture resistance of endodontically treated teeth. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-01-01 2022-04-29T08:43:58Z 2022-04-29T08:43:58Z |
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/s0103-64402008000400008 Brazilian Dental Journal, v. 19, n. 4, p. 329-333, 2008. 1806-4760 0103-6440 http://hdl.handle.net/11449/231197 10.1590/s0103-64402008000400008 2-s2.0-63249122986 |
url |
http://dx.doi.org/10.1590/s0103-64402008000400008 http://hdl.handle.net/11449/231197 |
identifier_str_mv |
Brazilian Dental Journal, v. 19, n. 4, p. 329-333, 2008. 1806-4760 0103-6440 10.1590/s0103-64402008000400008 2-s2.0-63249122986 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Dental Journal |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
329-333 |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808128677101174784 |