Evaluation of color change in acrylic and bisacrylic resin resins in different solutions

Aim: This work aimed to evaluate the color stability of an acrylic resin chemically activated (ARCA) using different handling techniques, and a bisacrylic resin when exposed to different pigmentation solutions. Material and Methods: Silicon matrixes were confectioned (10x10x3mm) to be used as specimens. The groups were designed as follows: Group Pot, Group Brush, Group Manufacturer and Group Bisacrylic (n=18). Each group was exposed to three different pigmentation solutions: distilled water, coke and chlorhexidine digluconate 0.12%. Three readings were performed for each specimen using a spectrophotometer, and the evaluations were carried out in three different time. After the color reading, three averages and the standard deviation of variation were performed after 24 hours (T1), 7 days (T2) and 14 days (T3). Data were submitted to the ANOVA and 2 criteria and Tukey (P<0.05) in the statistical software SSPS 18 for Macintosh (SPSS Inc., Chicago, USA). Results: When compared the solutions in each group of material, there was no statistically significant difference, except for T3, where the group Dencor Brush and Bisacrylic demonstrated higher color variation in all the solutions, even in the control group, and the values in Chlorhexidine higher than the other, showing greater instability after 14 days. Conclusions: With the results, bisacrylic resin used as provisory prosthesis material presents greater color instability than the ARCA, when submitted to different solutions. Bisacrylic resin and Dencor Brush present significantly visible color changes in chlorhexidine solution after 14 days. All the materials in coke solution present homogeneity in the color change after 7 days exposition to the solution, with no visible color change

Evaluation of surface roughness of chemically activated acrylic resin and bisacryl

Objetivo: Este trabalho avaliou a rugosidade superficial de uma Resina Acrílica Ativada Quimicamente (RAAQ) e uma Resina Bisacrílica, em diferentes técnicas de manipulação, para confecção de coroas provisórias. Materiais e Métodos: Foram confeccionadas matrizes de silicone (20x10x3mm) que serviram para confecção dos corpos de prova, que formaram 4 grupos: Grupo Panela, Grupo Pincel, Grupo Fabricante e Grupo Bisacrílica (n=12). Após a polimerização, foram realizadas 3 leituras longitudinais e 3 transversais com auxílio de um rugosímetro digital. As leituras foram repetidas após acabamento e polimento dos corpos de prova em Politriz Metalográfica. Os valores de rugosidade foram somados e criada uma média para cada corpo de prova, os quais foram somados novamente dentro do seu grupo criando uma média e desvio padrão, antes e após o polimento. Os dados foram submetidos a ANOVA a 2 critérios e Sidak's multiple comparisons test (P<0,05). Resultados: Observou-se que há influência da técnica de manipulação e do tipo de resina acrílica na propriedade de rugosidade superficial. Dentre os grupos, Bisacrílica demonstrou menores valores de rugosidade, porém os outros grupos demonstraram uma melhora da rugosidade superficial após o polimento. Conclusão: Há uma influência direta da técnica de manipulação e da marca comercial na propriedade de rugosidade superficial, demonstrando que existe a necessidade de um polimento para as resinas acrílicas possuírem uma rugosidade ideal, independente do tipo de técnica e marca comercial.Objective: the aim of this study was to evaluate the surface roughness of Chemically Activated Acrylic Resin (CAAR) and Bysacril Resin used for temporary crown construction, with different techniques of manipulation. Materials and methods: silicone matrixes (20x10x3mm) were built and served for preparation of specimens, which formed 4 groups: Pressurized Pot Group, Bead Brush Group, Manufacturer's Group and Bisacryl Group (n = 12). After polymerization, 3 longitudinal and 3 transversal readings were performed with the aid of a digital rugosimeter. The readings were repeated after finishing and polishing of the specimens in a Metallographic polishing machine. The roughness values were added and an average was created for each specimen, who was grouped again within each group creating an average and standard deviation, before and after they were polished. The data were submitted to a two-way ANOVA test and Sidak's multiple comparisons test (P < 0.05). Results: It was observed that there is influence between manipulation technique and type of acrylic resin on property of surface roughness. Among the groups, Bisacryl demonstrated smaller values of roughness, however other groups have shown an improvement of surface roughness after they were polished. Conclusion: There is a direct influence between the technique of manipulation and commercial brand in the surface’s roughness properties, showing that polishing is needed in order to acrylic resins achieve ideal roughness, independently of the chosen technique or commercial brand

Evaluation of the color change of acrylic resin chemically activated and Bisacryl in different solutions

Materiais restauradores provisórios são um complemento importante para uma variedade de procedimentos odontológicos indiretos, como próteses fixas. Um aspecto relevante da qualidade das restaurações provisórias é a estabilidade de cor dos materiais, sendo um critério importante para a seleção do material a ser utilizado. Este trabalho visou avaliar a estabilidade de cor de resinas ativadas quimicamente (RAAQs) em diferentes técnicas de manipulação e uma Resina Bis-acrílica, ambas expostas a diferentes soluções. Foram confeccionadas matrizes de silicone (10x10x3mm) que serviram para confecção dos corpos de prova, que formaram 4 grupos: Grupo Panela, Grupo Pincel, Grupo Fabricante e Grupo Bis-acrílica. Cada grupo foi exposto a três diferentes soluções: água destilada, coca-cola e digluconato de clorexidina 0,12%. Foram feitas 3 leituras em cada corpo de prova com auxílio de um espectofotômetro, as avaliações foram realizadas em três tempos diferentes. Após a leitura de cor foram realizados as médias e desvio padrão das variações de cor após 24 horas (T1), 7 dias (T2) e 14 dias (T3). Os dados foram submetidos a ANOVA a 2 critérios e Tukey, (P<0,05) no programa estatístico SSPS 18 para Macintosh (SPSS Inc., Chicago, USA). Nos resultados observou-se que quando comparado as soluções em cada grupo de material não houve diferença estatisticamente significante, exceto em T3 onde o grupo Dencor Pincel e Bis-acrílica demonstraram valores maiores de variação de cor em todas as soluções, até mesmo no grupo controle, sendo os valores em Clorexidina maiores do que os outros, demonstrando maior instabilidade da cor após 14 dias. Com os resultados, a resina bis-acrílica utilizada como material protéticos provisório apresenta menor estabilidade de cor do que a RAAQ quando submetidos as diferentes soluções. A resina Bis-acrílica e a Dencor Pincel apresentam alteração de cor visível significativa em solução de clorexidina após 14 dias. Todos os materiais em solução de coca-cola apresentam homogeneidade na alteração de cor a partir de 7 dias de exposição à solução, sem alteração de cor visível.Provisional restorative materials are an important complement to a variety of indirect dental procedures such as fixed prostheses. An important aspect of the quality of provisional restorations is the color stability of the material, being an important criterion for selecting the material to be used. This paper aimed to evaluate the stability of chemically colored activated resins (CCARs) in different manipulation techniques and a Bis-acrylic resin, both exposed to different solutions. A matrix made of silicone (20x10x3mm) who served for manufacture of specimens, which formed 4 groups: Pan Group, Brush Group, Manufacturer Group and Bisacryl Group. Each group was exposed to three different solutions: distilled water, coke and chlorhexidine gluconate 0.12%. Three readings were made in each specimen with the aid of a spectrophotometer, the evaluations were realized at three different times. After the color reading were realizes average and standard deviation of color variations after 24 hours (T1), 7 days (T2) and 14 days (T3). Data was submitted to a two-way ANOVA test and a Tukey’s test (p<0.05) in the statistical software SPSS 18.0 for Mac (SPSS Inc., Chicago, USA). The results revealed that compared solutions in each material group there was no statistically significant difference, except in T3 where the Dencor Brush and Bis-acrylic group demonstrated higher values of color variation in all solutions, even in the control group and the values of chlorhexidine larger than the others, demonstrating color instability after 14 days. The Bisacrylic resin and Dencor brush in chlorhexidine, have significant color change visible in chlorhexidine solution after 14 days. All materials coke solution have homogeneous color change from 7 days of exposure to the solution without changing the visible color

Evaluation of the color change of acrylic resin chemically activated and Bisacryl in different solutions

Materiais restauradores provisórios são um complemento importante para uma variedade de procedimentos odontológicos indiretos, como próteses fixas. Um aspecto relevante da qualidade das restaurações provisórias é a estabilidade de cor dos materiais, sendo um critério importante para a seleção do material a ser utilizado. Este trabalho visou avaliar a estabilidade de cor de resinas ativadas quimicamente (RAAQs) em diferentes técnicas de manipulação e uma Resina Bis-acrílica, ambas expostas a diferentes soluções. Foram confeccionadas matrizes de silicone (10x10x3mm) que serviram para confecção dos corpos de prova, que formaram 4 grupos: Grupo Panela, Grupo Pincel, Grupo Fabricante e Grupo Bis-acrílica. Cada grupo foi exposto a três diferentes soluções: água destilada, coca-cola e digluconato de clorexidina 0,12%. Foram feitas 3 leituras em cada corpo de prova com auxílio de um espectofotômetro, as avaliações foram realizadas em três tempos diferentes. Após a leitura de cor foram realizados as médias e desvio padrão das variações de cor após 24 horas (T1), 7 dias (T2) e 14 dias (T3). Os dados foram submetidos a ANOVA a 2 critérios e Tukey, (P<0,05) no programa estatístico SSPS 18 para Macintosh (SPSS Inc., Chicago, USA). Nos resultados observou-se que quando comparado as soluções em cada grupo de material não houve diferença estatisticamente significante, exceto em T3 onde o grupo Dencor Pincel e Bis-acrílica demonstraram valores maiores de variação de cor em todas as soluções, até mesmo no grupo controle, sendo os valores em Clorexidina maiores do que os outros, demonstrando maior instabilidade da cor após 14 dias. Com os resultados, a resina bis-acrílica utilizada como material protéticos provisório apresenta menor estabilidade de cor do que a RAAQ quando submetidos as diferentes soluções. A resina Bis-acrílica e a Dencor Pincel apresentam alteração de cor visível significativa em solução de clorexidina após 14 dias. Todos os materiais em solução de coca-cola apresentam homogeneidade na alteração de cor a partir de 7 dias de exposição à solução, sem alteração de cor visível.Provisional restorative materials are an important complement to a variety of indirect dental procedures such as fixed prostheses. An important aspect of the quality of provisional restorations is the color stability of the material, being an important criterion for selecting the material to be used. This paper aimed to evaluate the stability of chemically colored activated resins (CCARs) in different manipulation techniques and a Bis-acrylic resin, both exposed to different solutions. A matrix made of silicone (20x10x3mm) who served for manufacture of specimens, which formed 4 groups: Pan Group, Brush Group, Manufacturer Group and Bisacryl Group. Each group was exposed to three different solutions: distilled water, coke and chlorhexidine gluconate 0.12%. Three readings were made in each specimen with the aid of a spectrophotometer, the evaluations were realized at three different times. After the color reading were realizes average and standard deviation of color variations after 24 hours (T1), 7 days (T2) and 14 days (T3). Data was submitted to a two-way ANOVA test and a Tukey’s test (p<0.05) in the statistical software SPSS 18.0 for Mac (SPSS Inc., Chicago, USA). The results revealed that compared solutions in each material group there was no statistically significant difference, except in T3 where the Dencor Brush and Bis-acrylic group demonstrated higher values of color variation in all solutions, even in the control group and the values of chlorhexidine larger than the others, demonstrating color instability after 14 days. The Bisacrylic resin and Dencor brush in chlorhexidine, have significant color change visible in chlorhexidine solution after 14 days. All materials coke solution have homogeneous color change from 7 days of exposure to the solution without changing the visible color

Evaluation of color change in acrylic and bisacrylic resin resins in different solutions

Aim: This work aimed to evaluate the color stability of an acrylic resin chemically activated (ARCA) using different handling techniques, and a bisacrylic resin when exposed to different pigmentation solutions. Material and Methods: Silicon matrixes were confectioned (10x10x3mm) to be used as specimens. The groups were designed as follows: Group Pot, Group Brush, Group Manufacturer and Group Bisacrylic (n=18). Each group was exposed to three different pigmentation solutions: distilled water, coke and chlorhexidine digluconate 0.12%. Three readings were performed for each specimen using a spectrophotometer, and the evaluations were carried out in three different time. After the color reading, three averages and the standard deviation of variation were performed after 24 hours (T1), 7 days (T2) and 14 days (T3). Data were submitted to the ANOVA and 2 criteria and Tukey (P<0.05) in the statistical software SSPS 18 for Macintosh (SPSS Inc., Chicago, USA). Results: When compared the solutions in each group of material, there was no statistically significant difference, except for T3, where the group Dencor Brush and Bisacrylic demonstrated higher color variation in all the solutions, even in the control group, and the values in Chlorhexidine higher than the other, showing greater instability after 14 days. Conclusions: With the results, bisacrylic resin used as provisory prosthesis material presents greater color instability than the ARCA, when submitted to different solutions. Bisacrylic resin and Dencor Brush present significantly visible color changes in chlorhexidine solution after 14 days. All the materials in coke solution present homogeneity in the color change after 7 days exposition to the solution, with no visible color change