Fracture resistance of weakened roots restored with composite resin and glass fiber post

Detalhes bibliográficos
Autor(a) principal: Zogheib, Lucas Villaça
Data de Publicação: 2008
Outros Autores: Pereira, Jefferson Ricardo, do Valle, Accácio Lins, de Oliveira, Jonas Alves, Pegoraro, Luiz Fernando
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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spelling 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