Detalhes bibliográficos
| Ano de defesa: |
2014 |
| Autor(a) principal: |
Rosa, Luciano
 |
| Orientador(a): |
Bona, Álvaro Della
|
| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade de Passo Fundo
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Odontologia
|
| Departamento: |
Faculdade de Odontologia – FO
|
| País: |
Brasil
|
| Palavras-chave em Português: |
|
| Área do conhecimento CNPq: |
|
| Link de acesso: |
http://tede.upf.br:8080/jspui/handle/tede/1828
|
Resumo: |
This study aims to evaluate the influence of occlusal opening in the fracture resistance of implant-supported crowns with zirconia (YZ) and metal (MC) infrastructure (IE), screw-retained or cemented. The IEs were porcelain veneered. Four experimental groups (n = 12) were evaluated: YZc and MCc - cemented YZ and MC crowns; and YZs and MCs - screw-retained YZ and MC crowns. All crowns were tested under compressive load to failure in 37°C distilled water. Fractured surfaces were examined to determine the crack origin. The maximal fracture loads were evaluated using two-way analysis of variance (ANOVA) and Tuckey (α = 0.05). The type of crown fixation (cementation or screw-retained) influenced the fracture resistance. MCc and YZc groups had greater mean values than the screw-retained groups. The material IE (Y-TZP or metal) did not influence the resistance of the crowns. In conclusion, the occlusal opening showed a negative influence on the maximum fracture load of crowns, irrespective to the IE material type, confirming the study hypothesis. |
