RESUMO
BACKGROUND: The constant search for an improved esthetic dental material has led investigators to realize that its performance depends on the conditions where the material is used. It has been probed that the contact with mouth rinses triggers alterations, reason why the aim of this study was to identify their possible effects of it on the integrity of nanohybrid composite resin and resin modified glass ionomer. MATERIAL AND METHODS: A total of 144 samples were manufactured with two nanohybrid composite resins and two resin modified glass ionomer restorative materials. The specimens were immersed in one of the three mouthwashes used in the study, for a total of 1092 minutes, with intervals of contact with artificial saliva. This strategy simulates three years of constant use of mouthwashes. The samples weight and surface roughness measurement was recorded with a precision scale and profilometer, at different stages: At the beginning of the study, after 546 minutes (simulating one and a half year), and after 1092 minutes (simulating three years). RESULTS: The collected data on surface roughness and weight were submitted to the analysis of variance (ANOVA), with repeated measures of three factors. The results determined shifts in values in terms of weight and roughness in all the samples. The composite resin "Grandio" group was the one that showed bigger shifts, while the glass ionomer group "Vitremer" showed stability on its structure. The evaluated mouthwashes displayed similar behavior between each other. CONCLUSIONS: The use of mouthwashes triggered changes on the structure of both dental materials: composite resin and resin modified glass ionomer mostly associated with surface roughness. Key words:Glass ionomer, composite resin, mouthwash, roughness, degradation.
RESUMO
Objetivo: Evaluar la degradación de resinas compuestas en cuanto a su masa y rugosidad, al ser sometidas al contacto con enjuagues bucales. Materiales y Métodos: 88 discos de resinas nanohíbridas Grandio (VOCO) y Filtek Z250 XT (3M), correspondieron 44 discos para cada resina, a su vez se dividieron en 3 subgrupos (n: 14) y 2 discos seleccionados aleatoriamente fueron considerados control. Fueron sumergidos en un mismo enjuague bucal, Listerine Zero, Coolmint, y Whitening por 21 minutos, seguido por un nuevo pesaje y evaluación de la rugosidad superficial, para luego ser colocados en contacto con saliva artificial por 12 horas, entrando nuevamente en contacto con el enjuague respectivo y ser sometidos a una nueva evaluación de peso y rugosidad. Cada uno de estos ciclos fue ejecutado hasta completar 1092 minutos a una temperatura ambiente de 37°C. Resultados: las mediciones de rugosidad y peso analizados mediante ANOVA (p<0,001), mostraron ausencia de cambios significativos en las resinas evaluadas luego de ser sometidas al desafío del contacto con los enjuagues, sin embargo, sí se encontró diferencia en relación al tiempo de contacto. Conclusiones: los enjuagues bucales pueden provocar efecto negativo sobre las resinas compuestas que se incrementan en relación al tiempo de contacto.
Objetivo: Avaliar a degradação das resinas compostas quanto a sua massa e rugosidade, quando em contato com colutórios bucais. Materiais e Métodos: 88 discos de resinas nanohíbridas Grandio (VOCO) e Z250 XT (3M), sendo 44 discos para cada resina, que foram divididas em 3 grupos (n: 14) e dois discos, escolhidos aleatoriamente, foram consideradas controle. As amostras foram imersas nos seguintes colutórios: Listerine zero, Coolmint e branqueamento durante 21 minutos, em seguida foi realizada uma nova pesagem e avaliação da rugosidade da superfície, e, por fim, foram colocados em contato com a saliva artificial durante 12 horas. Após esse periodo, as amostras foram submetida a uma reavaliação do massa e rugosidade. Cada um destes ciclos foi executado para completar 1.092 minutos a uma temperatura ambiente de 37°C. Resultados: medições da rugosidade e analisados por ANOVA (p<0,001) não revelou alterações significativas nas resinas avaliadas, no entanto, outras diferenças foram encontradas em relação ao tempo contato. Conclusões: Os colutórios podem causar efeito negativo sobre as resinas compostas conforme o aumento de tempo de uso.
Aim: Evaluate the degradation of composite resins in terms of mass and roughness, when it is in contact with mouth rinses. Materials and Methods: 88 discs of nanohybrid resins Grandio (VOCO) and Filtek Z250 XT (3M), corresponded to 44 discs for each one, divided into 3 subgroups (n: 14) and 2 discs that were randomly selected as control group. They were submerged in the same mouth rinse, Listerine Zero, Coolmint, and Whitening for 21 minutes, followed by a new weighing and evaluation of the surface roughness, then they were placed in contact with artificial saliva for 12 hours, and then placed again in contact with the respective mouth rinse and also be subjected to a new evaluation of weight and roughness. Each of these cycles was executed until 1092 minutes were completed at a temperature of 37°C. Results: The roughness and weight measurements analyzed by ANOVA (p<0,001) showed no significant changes in the evaluated resins after the contact of mouth rinses, nevertheless, there was significant in relation with the time of contact. Conclusions: Mouth rinses can cause a negative effect on composite resins that increase in relation to time of contact.
Assuntos
Humanos , Resinas Compostas , Propriedades de Superfície , Cemento Dentário , Antissépticos BucaisRESUMO
Objetivos: Evaluar los cambios de masa y rugosidad del ionómero de vidrio al contacto con los enjuagues, considerando el tiempo de exposición y su composición. Materiales y métodos: Se realizaron 88 cuerpos de prueba de ionómeros de vidrio Ionolux y Vitremer que se mantuvieron en contacto con Listerine Zero sin alcohol, Cool Mint con alcohol, y Whitening con alcohol y agentes blanqueadores; durante 21, 546 y 1092 minutos con ciclos de permanencia de los especímenes en saliva artificial, y se realizó pesaje de pruebas de perfilómetro de forma continua. Resultados: los datos tabulados y analizados mediante prueba de ANOVA mostraron degradación en las muestras, sin diferencia estadísticamente significante evidenciada también en la rugosidad, de manera proporcional al tiempo de exposición. Conclusiones: existen cambios tanto en peso como en rugosidad sobre los ionómeros evaluados tras contacto con los diferentes enjuagues utilizados, proporcionales al tiempo de exposición. La presencia de alcohol en el enjuague bucal no determina mayor cambio de la masa de los materiales evaluados; pero sí en rugosidad, en comparación con otras composiciones de enjuagues y el tiempo de exposición.
Objectives: to evaluate changes in mass and roughness of glass ionomer in contact with mouthrinses considering time of exposure and their composition. Materials and Methods: 88 Ionolux and Vitremer glass ionomer test bodies were made and kept in contact with alcohol-free Listerine Zero, Cool Mint, with alcohol, and Whitening with alcohol and bleaching agents during 21, 546 and 1092 minutes with cycles of permanence of specimens in artificial saliva, weighing and profilometer tests were carrying out in a continuous way. Results: The data tabulated and analyzed by ANOVA test showed degradation in samples without any statistically significant difference evidenced even in roughness, it is proportional to time of exposure. Conclusions: There are changes in weight and roughness on ionomers evaluated aftercontact with different mouth rinses used proportional to time of exposure. The presence of alcohol in the mouthwash does not determine greater change in the mass of evaluated materials; but roughness does in comparison with other mouth rinse compositions and exposure time.
