Efeito do polimento de consultório (chairside polishing) em cerâmica monolíticas para sistema CAD/CAM após imersão em soluções ácidas/corantes: caracterização da superfície e características ópticas.

• Autor(a) principal: Chiorlin, Adriane Boaventura [UNESP]
• Data de Publicação: 2020
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/213591
• topic: Computer-Aided Design; Desenho assistido por computador; Polimento dentário; Pigmentação

Currently, there is a question for “Clinical polishing kits results in a superior polishing finish or similar to that obtained with glaze?”, and “What is the importance?” The aim of this study was to evaluate the physical, chemical and machanical characteristics of lithium disilicate ceramics for the CAD / CAM system, submitted to different polishing protocols and after different periods of immersion in acidic / dye solutions. The study presented four factors under analysis: (1) different polishing systems (G - Glaze, C - Ceramisté Polishing Kit (Shofu) and O - OptraFine Polishing Kit (Ivoclar)); (2) immersion solutions (AD - distilled water, CP - black tea and VT - red wine);(3) repolishing with C and O kits , after 54 and 108 hours of immersion; (4) different analysis times (T0 - 0 hours, T1 - 54 hours ,T2 - 108 hours e T3 – 162 hours). Seven variables were considered, in relation to surface characterization (1) surface roughness (Ra), (2) Knoop hardness and the optical properties of (3) color stability, (4) translucency and (5) contrast. The data obtained were submitted to statistical analysis of variance ANOVA (two factor) and Tukey test with significance of 5% was applied. The groups that received the glaze showed an medium Ra of 0.07 ± 0.03 μm, the mechanically polished groups (C and O) 0.08 ± 0.02 μm and the groups with wear and unpolished 0.40 ± 0.02. Microhardness, there was no statistically significant difference between the groups evaluated. There was a gradual increase in ΔE values as the immersion periods increased, independent of the polishing performed. According to the staining potential, the materials were classified in the following order (highest to lowest staining potential): GGD> GGDC> GGDG> GGDO> GG. And the solutions: black tea > red wine > destilled water. Repolishing with PC and PO kits did not influence microhardness, color stability (ΔE), translucency (TP) and contrast (CR). However, repolishing with the O Kit favored surface roughness. It is concluded that intraoral polishing kits are viable polishing options for lithium disilicate ceramics for CAD / CAM.