Restaurações provisórias contemporâneas: efeito do tempo e meios de imersão nas propriedades físico-mecânicas

• Autor(a) principal: Jorge, Caroline de Freitas [UNESP]
• Data de Publicação: 2018
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203284; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2019-04-18/000912007.pdf
• topic: Resinas acrílicas; Projeto auxiliado por computador; Coroa dentária; Acrylic resins

Different materials are used to confection of the provisional restorations. With advance technology computer-aided design was possible to develop new materials, such as Computer-Aided Design/Computer-Aided Manufacturing - CAD/CAM. This way, the objective of this present study is to evaluate sorption (SR), solubility (SO) surface roughness (Ra) and Knoop microhardness (MK) of the pre-fabricated polymer blocks or high density polymer to CAD/CAM comparing with different materials (thermo polymerized acrylic resin, auto polymerized acrylic resin and bisacrylic resin), after immersion in acid-color solutions, in the periods of 7,14, 28, 90 and 180 days. It Were made 160 specimens with 10×10×3 (±0,005mm), divided in 16 groups (n=10) according the material and solution. Four different resin were evaluated: RAT - thermo polymerized acrylic resin (Clássico), RAA - auto polymerized acrylic resin (Alike), RB - nanoparticulate bisacrylic resin (Protemp4) and RCAD - pre-fabricated polymer blocks (PMMA) to CAD/CAM system (Telio CAD); immersed in following solutions: artificial saliva (S- Control), cola soft drink (R), coffee (C) and red wine (V). Knoop microhardness, surface roughness, sorption and solubility were realized the analyzes in 6 periods (7, 14, 28, 90 e 180 days). The Shapiro-Wilk and Levene method were used to test normality and confirm the homogeneity of the data. ANOVA 3 factors for repeated measurements was used to verify the influence of material type, solution and immersion period. The Bonferroni test was used as a posthoc technique. In the analysis of microhardness after 180 days, the RCAD showed the highest values while the RB presented the lowest values. In the roughness in 180 days, the RAA group presented the highest values (> 0,121), independently of the solution, while the lowest values were found in the RAT (0.063), RB (0.06) and RCAD (0.062) groups when...