A carregar...
Publicação
Avaliação da cor de restaurações monolíticas de zircónia pré-colorida, sobre três tipos de substratos e dois cimentos de resina: estudo laboratorial
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 1.23 MB | Adobe PDF |
Orientador(es)
Resumo(s)
Objetivo: Avaliar a cor de restaurações monolítica de zircónia pré-colorida, sobre três tipos de substrato e dois cimentos de resina.
Materiais e métodos: Foram confecionados 20 espécimes de cerâmica de duas marcas comerciais diferentes, divididas em dois grupos (n=10). Grupo 1 da Amann Girrbach (AG) e grupo 2 da Zirkonzahn (ZZ). As leituras de cor foram realizadas com o espectrofotómetro Easyshade V medindo a cor das coroas, sobre três substratos (dente natural, metal e zircónia) e sobre o glicerol e dois cimentos (neutral e light). Os valores de L*C*h* e ΔE foram registados, e os dados submetidos a analise estatística. Para verificar a normalidade da amostra foi realizado o teste Shapiro-Wilk, e como não seguia uma distribuição normal recorreu-se ao teste não paramétrico Kruskal-Wallis para comparar os resultados de ΔE dentro de cada variável em estudo (tipo de zircónia, tipo de substrato e tipo de cimento). Para avaliar a influencia do cimento sobre o substrato foi realizada uma análise de variância unifactorial, seguida de testes post-hoc segundo o método de Tukey.
Resultados: Para a marca AG e substrato metal, registaram-se diferenças estatisticamente significativas (p<0,05) entre o cimento neutral e o cimento light e glicerol. Relativamente às restaurações da marca ZZ, registaram-se diferenças estatisticamente significativas (p<0,05) sendo que o ΔE do cimento light foi superior ao do glicerol e cimento neutral. Em relação ao substrato zircónia e, nas duas marcas, existiram diferenças estatisticamente significativas (p<0,05) entre os grupos glicerol-neutral e neutral-light, sendo que em ambos os casos o glicerol manteve valores de ΔE inferiores. Relativamente à marca AG e para o substrato dente natural não existiram diferenças estatisticamente significativas (p>0,05) entre os vários cimentos. Na marca ZZ e para o mesmo substrato existiram diferenças significativas (p<0,05) sendo que o ΔE do cimento light foi superior comparativamente ao ΔE dos cimento neutral e glicerol.
Conclusão: Os materiais de restauração, substratos e cimentos tiveram influência significativa na cor final das restaurações cerâmicas.
Objectives: To evaluate the color of pré-colored zirconia monolithic restorations under three substrate types and two resin cements. Materials and Methods: Twenty ceramic specimens of two different trademarks were made, divided into two groups. Group 1 (n=10) from Amann Girrbach (AG) and group 2 (n=10) from Zirkonzahn (ZZ). Color measurements were taken with the Easyshade V spectrophometer, measuring crown color over three substrates (natural tooth, metal and zircónia) using glycerol and two cements (Neutral and Light). The of L*C*h* and ΔE values were recorded and the data here subjected to statistical analysis. To verify the normality of the sample, the Shapiro-Wilk test was performed, and as it did not follow a normal distribution, the Kruskal-Wallis test was used. A one way analysis of variance was performed followed by Tukey post-hoc tests. Results: For the AG brand and metal substrate, significant differences were found between neutral cement and light cement and glycerol. Regarding ZZ restorations, significant differences (p<0,05) were observed, with ΔE of light cement being higher than glycerol and neutral cement. The zircónia substrate and, in both brands, there were significant differences between the glycerol-neutral and neutral-light cements, and in both cases the glycerol maintained lower ΔE values. Regarding the AG brand and for the natural tooth substrate there were no statistically significant differences (p> 0,05) between the various cements. In the ZZ brand and for the same substrate there were significant differences (p<0,05) and ΔE of light cement was higher compared to ΔE of other cements. Conclusions: The restorative material, substrates and cement variables had influence on the final color of ceramic restorations
Objectives: To evaluate the color of pré-colored zirconia monolithic restorations under three substrate types and two resin cements. Materials and Methods: Twenty ceramic specimens of two different trademarks were made, divided into two groups. Group 1 (n=10) from Amann Girrbach (AG) and group 2 (n=10) from Zirkonzahn (ZZ). Color measurements were taken with the Easyshade V spectrophometer, measuring crown color over three substrates (natural tooth, metal and zircónia) using glycerol and two cements (Neutral and Light). The of L*C*h* and ΔE values were recorded and the data here subjected to statistical analysis. To verify the normality of the sample, the Shapiro-Wilk test was performed, and as it did not follow a normal distribution, the Kruskal-Wallis test was used. A one way analysis of variance was performed followed by Tukey post-hoc tests. Results: For the AG brand and metal substrate, significant differences were found between neutral cement and light cement and glycerol. Regarding ZZ restorations, significant differences (p<0,05) were observed, with ΔE of light cement being higher than glycerol and neutral cement. The zircónia substrate and, in both brands, there were significant differences between the glycerol-neutral and neutral-light cements, and in both cases the glycerol maintained lower ΔE values. Regarding the AG brand and for the natural tooth substrate there were no statistically significant differences (p> 0,05) between the various cements. In the ZZ brand and for the same substrate there were significant differences (p<0,05) and ΔE of light cement was higher compared to ΔE of other cements. Conclusions: The restorative material, substrates and cement variables had influence on the final color of ceramic restorations
Descrição
Mestrado Integrado em Medicina Dentária
Palavras-chave
Teses de mestrado - 2019