Resistência de união à cerâmica e avaliação de propriedades químico-mecânicas e ópticas de cimento resinoso fotoativado contaminado por agentes hemostáticos

• Autor(a) principal: Araújo, Isabela Sousa de
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFU
• Texto Completo: https://repositorio.ufu.br/handle/123456789/17004; https://doi.org/10.14393/ufu.di.2015.43
• topic: Análise de cor; Cimento resinoso; Grau de conversão; Resistência adesiva; Agentes hemostáticos; Cimentos dentários; Materiais dentários; Restauração (Odontologia); Bond strength; Chemical elemental analysis; Color analysis; Degree of conversion; Hemostatic solutions; Light-cure resin cement; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

The aim of this study was to evaluate the degree of conversion, color stability, chemical composition, and bond strength of a light-cure resin cement (Variolink Veneer, Ivoclar Vivadent) contaminated with three different hemostatic solutions ( Hemostop, Viscostat and Viscostat Clear). Specimens were prepared for the control (uncontaminated resin cement) and experimental groups (resin cement contaminated with one hemostatic solution) according to the tests. For the degree of conversion (n=5) and color analysis (n=10), specimens (3 mm thick and 2 mm in diameter) were evaluated using a Fourier infrared transform spectroscopy (FTIR) and spectrophotometer (analyzed in the CIElab system (L * a * b *) respectively. For the elemental chemical analysis (n=1), specimens (2 mm thick and 6 mm in diameter) were evaluated using x-ray energy dispersive spectroscopy (EDS). The bond strength of the groups was assessed by microshear test (n=20) in a leucite-reinforced glass ceramic substrate (IPS Empress Cad LT A1), followed by analysis of the failure mode using scanning electron microscopy (SEM). The mean values, except for the elemental chemical evaluation and failure mode, were evaluated using split plot ANOVA and Tukey post hoc analysis. Contamination with ViscoStat increased cement degree of conversion, the color was influenced by contamination and aging caused the instability of color all groups and the bond strength was negatively influenced by contaminants.