Tenacidade de fratura da interface adesiva cerâmica-compósito
The objective of this study was evaluate the apparent interfacial fracture toughness (KA) and microtensile bond strength (σ) of the ceramic/resin adhesion zone, testing the hypothesis that KA and σ are affected by the ceramic surface treatment. Sixteen blocks of feldspatic ceramic...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | Brasil |
| Institución: | Universidade de Passo Fundo (UPF) |
| Repositorio: | Repositório Institucional da UPF |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.upf.br:123456789/3991 |
| Acceso en línea: | https://repositorio.upf.br/handle/123456789/3991 |
| Access Level: | acceso abierto |
| Palabra clave: | Restauração (Odontologia) Cerâmica odontológica Materiais dentários Restoration ( Dentistry) Dental ceramics Dental materials CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA |
| Sumario: | The objective of this study was evaluate the apparent interfacial fracture toughness (KA) and microtensile bond strength (σ) of the ceramic/resin adhesion zone, testing the hypothesis that KA and σ are affected by the ceramic surface treatment. Sixteen blocks of feldspatic ceramic (MII- Vita Mark II), were surface-treated with hydrofluoric acid (HF), silane (S), silane + MDP (SM) or combinations. We used Panavia F 2.0 or RelyX U 100 resin cements were used for cementation with resin blocks. The ceramic-cement-resin blocks were cut to fabricate bar-shaped specimens, which were tested in tension (σ). For KA, the specimens were indented (9,8 N; 10 s) with a Vickers indenter in the adhesive interface and loaded to failure in tension. Values of σ and the critical crack size (c) were used to calculate KA (KA = Y σ c1/2). The σ values were statistically analyzed using two-way Anova, Tukey (α=0.05) and Weibull. One-way Anova and Tukey (α=0.05) were used for KA. The association of HF and silane produced the highest values of m. The results of σ and KA were influenced by the ceramic surface treatment |
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