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Publication
Alteração da cor de materiais provisórios utilizados como definitivos
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 1.15 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Objetivo: Avaliação in vitro das modificações cromáticas induzidas por materiais provisórios de CAD/CAM de diversas espessuras e cor em diferentes substratos.
Materiais e métodos: Foram obtidas amostras de três categorias de resinas: resinas CAD/CAM A1 e A2 Vita CAD-Temp® monocolor, resinas CAD/CAM Telio® LT A2 B 40 L e resinas compostas nas tonalidades A2 e A3. Um total de 60 amostras foram preparadas, sendo 10 amostras de cada tipo de resina com espessuras de 1 mm e 2 mm. Para garantir uma uniformidade na rugosidade de superfície, todas as amostras foram submetidas a um processo de polimento utilizando lixas de carbeto de silício (SiC) de granulação 500, 1000 e 1500. As amostras das resinas CAD/CAM foram emparelhadas aleatoriamente com as amostras de resina composta, resultando em seis grupos contendo 10 amostras cada, totalizando 60 amostras para análise. A avaliação das amostras foi realizada utilizando um espectrofotômetro. Este equipamento permite a análise das características óticas das amostras, incluindo a cor e o brilho. As amostras foram analisadas antes e após o emparelhamento. Todos os dados obtidos foram submetidos a uma análise estatística utilizando o software SPSS (Statistics Package for the Social Sciences) versão 28.0.
Resultados: Os resultados mostraram que a luminosidade (L*) manteve-se constante nos materiais VITA CAD TEMP® A1 e Telio® CAD, mas diminuiu no VITA CAD TEMP® A2 com o aumento da espessura sobre a base A2. Os valores de a* tenderam para o verde e os de b* aumentaram nos materiais VITA CAD TEMP® e diminuíram no Telio® CAD com o aumento da espessura.
Conclusões: Conclui-se que a espessura e a cor da base influenciam significativamente a variação de cor nos materiais provisórios. O Vita CAD-Temp A2 mostrou melhor estabilidade de cor, sendo uma escolha adequada para manter a uniformidade em restaurações provisórias.
Objective: In vitro evaluation of the chromatic changes induced by provisional CAD/CAM materials of various thicknesses and colors on different substrates. Materials and Methods: Samples were obtained from three categories of resins: CAD/CAM resins A1 and A2 Vita CAD-Temp® monocolor, CAD/CAM resins Telio® LT A2 B 40 L, and composite resins in shades A2 and A3. A total of 60 samples were prepared, with 10 samples of each type of resin in thicknesses of 1 mm and 2 mm. To ensure uniform surface roughness, all samples underwent a polishing process using silicon carbide (SiC) abrasive papers with grits of 500, 1000, and 1500. The CAD/CAM resin samples were randomly paired with the composite resin samples, resulting in six groups containing 10 samples each, totaling 60 samples for analysis. The evaluation of the samples was conducted using a spectrophotometer. This equipment allows the analysis of the optical characteristics of the samples, including color and gloss. The samples were analyzed before and after pairing. All data obtained were subjected to statistical analysis using SPSS (Statistics Package for the Social Sciences) software, version 28.0. Results: The results showed that luminosity (L*) remained constant in VITA CAD TEMP® A1 and Telio® CAD but decreased in VITA CAD TEMP® A2 with increased thickness over the A2 base. The a* values shifted towards green, and b* values increased in VITA CAD TEMP® materials and decreased in Telio® CAD with increased thickness. Conclusions: It is concluded that thickness and base color significantly influence color variation in provisional materials. Vita CAD-Temp A2 demonstrated better color stability, making it a suitable choice for maintaining color uniformity in provisional restorations.
Objective: In vitro evaluation of the chromatic changes induced by provisional CAD/CAM materials of various thicknesses and colors on different substrates. Materials and Methods: Samples were obtained from three categories of resins: CAD/CAM resins A1 and A2 Vita CAD-Temp® monocolor, CAD/CAM resins Telio® LT A2 B 40 L, and composite resins in shades A2 and A3. A total of 60 samples were prepared, with 10 samples of each type of resin in thicknesses of 1 mm and 2 mm. To ensure uniform surface roughness, all samples underwent a polishing process using silicon carbide (SiC) abrasive papers with grits of 500, 1000, and 1500. The CAD/CAM resin samples were randomly paired with the composite resin samples, resulting in six groups containing 10 samples each, totaling 60 samples for analysis. The evaluation of the samples was conducted using a spectrophotometer. This equipment allows the analysis of the optical characteristics of the samples, including color and gloss. The samples were analyzed before and after pairing. All data obtained were subjected to statistical analysis using SPSS (Statistics Package for the Social Sciences) software, version 28.0. Results: The results showed that luminosity (L*) remained constant in VITA CAD TEMP® A1 and Telio® CAD but decreased in VITA CAD TEMP® A2 with increased thickness over the A2 base. The a* values shifted towards green, and b* values increased in VITA CAD TEMP® materials and decreased in Telio® CAD with increased thickness. Conclusions: It is concluded that thickness and base color significantly influence color variation in provisional materials. Vita CAD-Temp A2 demonstrated better color stability, making it a suitable choice for maintaining color uniformity in provisional restorations.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
CAD/CAM Provisório Cor Espectrofotómetro