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Efeito das pastas branqueadoras na estabilidade cromática de resinas compostas injetáveis
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| 19.17 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Objetivo: Avaliar a estabilidade cromática de duas resinas compostas fluidas obtidas por técnica de injeção (Aster flow e GrandioSO heavy flow) após imersão em dois pigmentos (café e coca-cola) e escovagem com duas pastas dentífricas branqueadoras (Sensodyne® Sensibilidade e Gengivas e Sensodyne® Rapid Action).
Materiais e Métodos: Espécimes circulares (17 x 2 mm) foram distribuídos aleatoriamente por doze grupos experimentais com base nas possíveis interações entre as três variáveis independentes em estudo (n = 5). A medição da cor foi registada em quatro tempos: T0 (inicial), T1, T2 e T3 (final). Inicialmente, os espécimes foram imersos na solução de pigmento durante 7 dias (T1) e, na semana seguinte, foram escovados duas vezes por dia com uma escova elétrica, após imersão na solução de pigmento durante 3 minutos (T2). Nas 3 semanas seguintes foi apenas realizada escovagem bi-diária (T3). O grupo controlo consistiu na imersão dos espécimes em saliva artificial a 37 ºC. As alterações da cor (ΔE) entre os diferentes tempos foram determinadas usando o sistema CIELab com um colorímetro (Optishade Style Italiano, Smile Line, Suíça). Os dados foram analisados estatisticamente através de testes Kruskal-Wallis e Mann-Whitney (α = 0,05).
Resultados: Não se verificaram diferenças estatisticamente significativas (p > 0,05) entre as resinas e entre as duas pastas em todos os tempos. Por outro lado, entre os diferentes pigmentos, verificaram-se diferenças significativas (p < 0,05) na estabilidade cromática.
Conclusão: As duas resinas utilizadas, bem como as pastas dentífricas, não condicionaram alterações na cor. Entre os diferentes pigmentos, o café foi o pigmento que provocou maiores mudanças de cor nas resinas.
Objective: Evaluate the color stability of two injectable composite resins (Aster flow and GrandioSO heavy flow) after immersion into two pigments (coffee and coca-cola) and brushing with two whitening toothpastes (Sensodyne® Sensitivity and Gum and Sensodyne® Rapid Action). Materials and Methods: Circular specimens (17 mm x 2 mm) were randomly distributed into twelve experimental groups based on possible interactions among the three independent variables under study (n = 5). Color measurements were recorded at four times: T0 (initial), T1, T2 and T3 (final). For 7 days, the specimens were immersed in the pigment solution (T1) and then brushed twice a day with an electric toothbrush, after spending 3 minutes in each pigment (T2). After 7 days, the specimens were brushed only for 3 weeks (T3). When the specimens were not immersed in the pigment solution, they were left in artificial saliva at 37º C. Color changes (ΔE) between different time points were determined using the CIELab system with a colorimeter (Optishade Style Italiano, Smile Line, Switzerland). Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney tests (α = 0.05) Results: No statistically significant differences (p > 0.05) were observed between the resins and between the two pastes at any time point. However, there were significant differences (p < 0.05) in color stability between the different pigments. Conclusion: The two resins used and the two toothpastes did not induce color changes. Among the different pigments, coffee was the pigment that caused the most significant color changes in the resins.
Objective: Evaluate the color stability of two injectable composite resins (Aster flow and GrandioSO heavy flow) after immersion into two pigments (coffee and coca-cola) and brushing with two whitening toothpastes (Sensodyne® Sensitivity and Gum and Sensodyne® Rapid Action). Materials and Methods: Circular specimens (17 mm x 2 mm) were randomly distributed into twelve experimental groups based on possible interactions among the three independent variables under study (n = 5). Color measurements were recorded at four times: T0 (initial), T1, T2 and T3 (final). For 7 days, the specimens were immersed in the pigment solution (T1) and then brushed twice a day with an electric toothbrush, after spending 3 minutes in each pigment (T2). After 7 days, the specimens were brushed only for 3 weeks (T3). When the specimens were not immersed in the pigment solution, they were left in artificial saliva at 37º C. Color changes (ΔE) between different time points were determined using the CIELab system with a colorimeter (Optishade Style Italiano, Smile Line, Switzerland). Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney tests (α = 0.05) Results: No statistically significant differences (p > 0.05) were observed between the resins and between the two pastes at any time point. However, there were significant differences (p < 0.05) in color stability between the different pigments. Conclusion: The two resins used and the two toothpastes did not induce color changes. Among the different pigments, coffee was the pigment that caused the most significant color changes in the resins.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Resina composta injetável Pigmentos Pastas dentífricas branqueadoras Cor