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Alteração da coloração de alinhadores estéticos expostos a diferentes meios
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Abstract(s)
O tratamento ortodôntico com recurso a alinhadores é cada vez mais comum, sendo uma das razões o seu valor estético face a outras alternativas de tratamento. É desejável que os alinhadores usados possuam uma boa estabilidade de cor, algo que poderá ser influenciado pelo consumo frequente de determinadas bebidas, entre outros fatores.
Objetivos: O estudo tem como principal finalidade avaliar a estabilidade de cor de alinhadores da marca Invisalign® após imersão em soluções. Materiais e métodos: Para a realização deste estudo foram utilizados 80 alinhadores da marca Invisalign®. Os alinhadores foram imersos em 4 meios (água, leite, chá preto e cerveja) e em soro fisiológico, funcionando como grupo controlo. Todos os meios se encontravam a 37ºC. A alteração cromática foi analisada por meio de espetrofotometria (SpectroShade Micro Optic) e de acordo com a Comissão Internacional de Sistema de Cores e por via de fotografias. A análise ocorreu em três tempos: inicial (T0), após 7 dias (T1) e após 14 dias (T3). A análise estatística dos dados recolhidos foi feita através dos testes ANOVA fatorial de medidas repetidas.
Resultados: Nenhum dos alinhadores apresentou alterações cromáticas visíveis e significativas (ΔE* > 3,7), quando expostos a todas as soluções. Os alinhadores imersos em chá preto e cerveja revelaram uma tendência em adquirir a cor amarela, tendo sido observado um aumento do valor de b*.
Conclusão: Os alinhadores apresentaram estabilidade de cor satisfatória quando expostos às soluções. O tempo de imersão influenciou o grau de pigmentação dos alinhadores.
Orthodontic treatment with aligners is increasingly common, one of the reasons is its aesthetic value in relation to other alternative treatments. It is desirable that the aligners used have good color stability, which can be influenced by the frequent consumption of certain drinks, among other factors. Objective: The main purpose of the study is to evaluate the color stability of Invisalign® aligners after continuous immersion in potentially dye solutions. Materials and methods: In order to carry out this study, 80 Invisalign® aligners were used. The aligners were immersed in 4 solutions (water, milk, black tea and beer) and in saline, functioning as a control group, with all solutions at 37ºC. The chromatic alteration was analyzed with spectrophotometry (SpectroShade Micro Optic), according to the International Commission of Color Systems and with photographs. The analysis took place in three stages: initial (T0), after 7 days (T1) and after 14 days (T3). The statistical analysis of the data was done through factorial ANOVA repetitive measures. Results: None of the aligners showed visible and significant chromatic changes (ΔE* > 3,7), when they were exposed to all solutions. The aligners immersed in black tea and beer showed a tendency to acquire yellow color, with an increase in the value of b* having been observed. Conclusion: The aligners showed satisfactory color stability when exposed to the solutions. The immersion time influenced the degree of pigmentation of the aligners.
Orthodontic treatment with aligners is increasingly common, one of the reasons is its aesthetic value in relation to other alternative treatments. It is desirable that the aligners used have good color stability, which can be influenced by the frequent consumption of certain drinks, among other factors. Objective: The main purpose of the study is to evaluate the color stability of Invisalign® aligners after continuous immersion in potentially dye solutions. Materials and methods: In order to carry out this study, 80 Invisalign® aligners were used. The aligners were immersed in 4 solutions (water, milk, black tea and beer) and in saline, functioning as a control group, with all solutions at 37ºC. The chromatic alteration was analyzed with spectrophotometry (SpectroShade Micro Optic), according to the International Commission of Color Systems and with photographs. The analysis took place in three stages: initial (T0), after 7 days (T1) and after 14 days (T3). The statistical analysis of the data was done through factorial ANOVA repetitive measures. Results: None of the aligners showed visible and significant chromatic changes (ΔE* > 3,7), when they were exposed to all solutions. The aligners immersed in black tea and beer showed a tendency to acquire yellow color, with an increase in the value of b* having been observed. Conclusion: The aligners showed satisfactory color stability when exposed to the solutions. The immersion time influenced the degree of pigmentation of the aligners.
Description
Dissertação para obtenção do grau de Mestre no Instituto Universitário Egas Moniz
Keywords
Ortodontia Alinhadores Estabilidade de cor Espetrofotometria