Resistência de união de primers/silanos em superfície de cêramica vítrea
DOI:
https://doi.org/10.12662/2317-3076jhbs.v8i1.3148.p1-7.2020Keywords:
Adesão, Resistência de União, Dissilicato de Lítio, Cimento Resinoso, SilanoAbstract
Objetivo: investigar a resistência de união por cisalhamento de diferentes soluções contendo silano e primer na superfície de Dissilicato de Lítio (IPS e.maxCAD, Ivoclar-Vivadent). Metodologia: 78 blocos cerâmicos foram incluídos em resina acrílica, polidos e lavados em ultra-som por 10 minutos. Os espécimes foram divididos em dois grupos de acordo com tratamento de superfície: Superfície Polida (PS); Ácido Hidro-Fluorídrico 9,5% - 20s (HF). Cada grupo foi dividido em três subgrupos (n = 13), de acordo com o tipo de silano: silano tradicional (Porcelain Prime, Inc. Bisco); mistura de silano e resina (KerrSilane, Kerr); mistura de silano e adesivo universal (Single-bond Universal, 3M Espe). Os espécimes foram montados em um dispositivo padrão para teste de cisalhamento (UltradentBonding Assembly), cimentados com cimento resinoso dual (Duolink Universal™, Bisco Inc.) e foto-polimerizados por 20s. As amostras foram testadas após 24 horas e 90 dias de armazenamento em água destilada a 47°C. Os dados foram analisados por 2-Way Anova e Teste de Tukey (α=5%). Resultados: em geral, os valores de resistência adesiva do silano tradicional foram, estatisticamente, mais elevados do que os outros tipos de silanos. O armazenamento afetou, significativamente, a força de adesão para a maioria dos grupos (p <0,001). O grupo PS apresentou menores valores de resistência adesiva, independentemente da variável (silano vs armazenamento). Conclusões: adequada resistência adesiva pode ser obtida com silanos tradicionais após o pré-tratamento de superfície com ácido HF.Downloads
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