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Restaurações definitivas vs provisórias sobre dente, avaliação da cor
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Advisor(s)
Abstract(s)
Objetivo: Avaliação in vitro das alterações de cor em materiais CAD/CAM provisórios e cerâmicas utilizando um substrato dentário bovino, variando a espessura dos materiais.
Materiais e Métodos: Foram utilizados três tipos de materiais diferentes, divididos em dois grupos. O primeiro grupo foi constituído por 40 amostras de resina CAD/CAM A1 Vita CAD-Temp® Monocolor com espessuras de 0,5, 0,8, 1 e 2 mm. O segundo grupo foi constituído por 20 amostras de cerâmica e.max® CAD e 20 amostras de Vitablocks® Mark II, ambas de cor A1 e com espessuras de 0,5 e 0,8 mm. Para garantir uma rugosidade de superfície uniforme, todas as amostras foram polidas com lixas de SiC de grão 500, 1000 e 1500. Após este passo, as amostras foram emparelhadas aleatoriamente com uma amostra de dente bovino, obtendo-se 8 grupos com 10 amostras por grupo (n=80). As amostras foram posteriormente analisadas por um espectrofotómetro antes e após o emparelhamento. Os dados obtidos foram analisados utilizando o programa SPSS.
Resultados: A análise de variação de cor (ΔEab) indicou que a VITA CAD-Temp® Monocolor apresentou menor variação de cor em comparação com os materiais definitivos, especialmente nas espessuras de 0,5mm e 0,8mm. Nas espessuras de 1mm e 2mm, apenas os dados de VITA CAD-Temp® Monocolor estavam disponíveis, não permitindo uma comparação completa entre todos os materiais. Os resultados sugerem que o aumento da espessura dos materiais reduz a variação de cor, com as espessuras maiores proporcionando uma coloração mais estável.
Conclusões: Os materiais provisórios apresentaram uma variação de cor mais estável em comparação com os materiais definitivos, especialmente em espessuras menores. Quanto maior a espessura do material, melhor a capacidade de camuflar o substrato subjacente, resultando em uma cor final mais uniforme e estética.
Objective: In vitro evaluation of color changes in provisional CAD/CAM materials and ceramics using a bovine dental substrate, varying the thickness of the materials. Materials and Methods: Three different types of materials were used, divided into two groups. The first group consisted of 40 samples of CAD/CAM A1 Vita CAD-Temp® Monocolor resin with thicknesses of 0.5, 0.8, 1, and 2 mm. The second group consisted of 20 samples of e.max® CAD ceramic and 20 samples of Vitablocks® Mark II, both A1 shade and with thicknesses of 0.5 and 0.8 mm. To ensure a uniform surface roughness, all samples were polished with SiC grit paper of 500, 1000, and 1500. After this step, the samples were randomly paired with a bovine tooth sample, resulting in 8 groups with 10 samples per group (n=80). The samples were subsequently analyzed by a spectrophotometer before and after pairing. The obtained data were analyzed using SPSS software. Results: The color variation analysis (ΔEab) indicated that VITA CAD-Temp® Monocolor showed less color variation compared to the definitive materials, especially at thicknesses of 0.5mm and 0.8mm. For the thicknesses of 1mm and 2mm, only VITA CAD-Temp® Monocolor data were available, not allowing a complete comparison between all materials. The results suggest that increasing the material thickness reduces color variation, with greater thicknesses providing more stable coloration. Conclusions: The provisional materials exhibited more stable color variation compared to the definitive materials, especially at thinner thicknesses. The greater the material thickness, the better its ability to mask the underlying substrate, resulting in a more uniform and aesthetic final color.
Objective: In vitro evaluation of color changes in provisional CAD/CAM materials and ceramics using a bovine dental substrate, varying the thickness of the materials. Materials and Methods: Three different types of materials were used, divided into two groups. The first group consisted of 40 samples of CAD/CAM A1 Vita CAD-Temp® Monocolor resin with thicknesses of 0.5, 0.8, 1, and 2 mm. The second group consisted of 20 samples of e.max® CAD ceramic and 20 samples of Vitablocks® Mark II, both A1 shade and with thicknesses of 0.5 and 0.8 mm. To ensure a uniform surface roughness, all samples were polished with SiC grit paper of 500, 1000, and 1500. After this step, the samples were randomly paired with a bovine tooth sample, resulting in 8 groups with 10 samples per group (n=80). The samples were subsequently analyzed by a spectrophotometer before and after pairing. The obtained data were analyzed using SPSS software. Results: The color variation analysis (ΔEab) indicated that VITA CAD-Temp® Monocolor showed less color variation compared to the definitive materials, especially at thicknesses of 0.5mm and 0.8mm. For the thicknesses of 1mm and 2mm, only VITA CAD-Temp® Monocolor data were available, not allowing a complete comparison between all materials. The results suggest that increasing the material thickness reduces color variation, with greater thicknesses providing more stable coloration. Conclusions: The provisional materials exhibited more stable color variation compared to the definitive materials, especially at thinner thicknesses. The greater the material thickness, the better its ability to mask the underlying substrate, resulting in a more uniform and aesthetic final color.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
CAD/CAM Resinas Cerâmicas Alteração de cor