Detalhes bibliográficos
| Ano de defesa: |
2014 |
| Autor(a) principal: |
Kasuya, Amanda Vessoni Barbosa
 |
| Orientador(a): |
Fonseca, Rodrigo Borges
|
| Banca de defesa: |
Fonseca, Rodrigo Borges,
Batata, Terezinha de Jesus Esteves,
Soares, Paulo Vinícius |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal de Goiás
|
| Programa de Pós-Graduação: |
Programa de Pós-graduação em Odontologia (FO)
|
| Departamento: |
Faculdade de Odontologia - FO (RG)
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://repositorio.bc.ufg.br/tede/handle/tede/3625
|
Resumo: |
The aim of this study was to analyze the stress distribution and fracture resistance of personalized posts made of an experimental composite, created by mixing short (3 mm) glass fiber with methacrylate matrix and filler particles and also, to compare personalized post to industrialized and anatomic ones. Four FEA models were created according to the restorative techniques: (FG) teeth restored with industrialized fiber post; (FG+RC) teeth restored with anatomic fiber post reline with resin; (FG+EXP) teeth restored with anatomic fiber post reline with experimental composite; (EXP) teeth restored with personalized post made of experimental composite. σvM and σmax criteria were determinated for stress assessment and specific regions were quantitative analyzed (post/dentin interface, core/dentin interface and post median longitudinal line for σvM, and buccal dentin and palatal dentin for σmax). Forty bovine incisors were divided in the same four groups (N=10). After being post-restored specimens were subjected to compressive-load (Intron 5965) at a 135-degree angle, applied by a 6mm-sphere tip. Failure modes was determined as it follows: (F1) core fracture; (F2) post fracture; (F3) root fracture; (F4) post/core/root set fracture. Stress mesurements and fracture resistance data were submitted to one-way ANOVA, followed by Tukey honestly significant difference test (α=.05). Failure mode were submitted to Kruskal Wallis (α=.05). EXP group showed more homogeneous stress distribution. Significant differences were found among the mean fracture resistance values (p=.000): FG+EXP(669.55±107.71)A; FG(620.72±59.29)A; EXP(506.54±27.07)B; FG+RC(452.75±81.63)B. No differences were found for failure mode (p=.595). The experimental composite significantly increases fracture resistance when used to reline industrialized fiber posts, and irrespenctive of its use, presented a lower σvM stress concentration in FEA models. |
