Estimate of Exercisem Intensity Based on Frequency Distribution of Heart Rate during Mountain Hiking in Middle-aged and Elderly Women

AbstractThe aim of this study was to evaluate the color stability and the surface roughness of different composites brushed with toothpastes presenting different levels of abrasivity. Thirty discs of each material were obtained using michohybrid composites (Brilliant NG and Charisma Diamond) and a nanocomposite (Filtek Z350XT). The initial color (CIELab) and surface roughness (confocal laser scanning microscopy) of resin discs were evaluated. Afterwards, 10 specimens per group were brushed with the following dentifrices: Maximum Cavity Protection, Sensodyne Repair & Protect and Colgate Sensitive Pro-Relief. Brushing was performed with an electric toothbrush equipped with soft bristle head, with standard power and weight, for 30 minutes. Every 30 seconds, 1.0 ml of the slurry was injected between the bristles of the brush and the specimen. After abrasive challenge, the samples had their color and roughness reevaluated. Data were submitted to the Kruskal-Wallis test (color change) or the t-test (surface roughness). The level of significance was 5%. Results: Brushing did not significantly change the color of the composites tested in the study herein . On the other hand, the surface roughness of the composites was significantly affected by the abrasive challenge, regardless of the toothpaste used. The surface roughness change was similar for all the composites. The abrasive challenge with the toothpastes Maximum Cavity protection, Sensodyne Repair & Protect and Colgate Sensitive Pro-Relief was not able to significantly change the color of the composite resins. Nevertheless, the abrasive challenges significantly altered the surface roughness of all the evaluated composites. However, the changes in surface roughness were statistically similar in the microhybrid and nanofilled composites. Keywords: Composites Resins. Dentifrices. Color. ResumoO objetivo deste estudo foi avaliar a estabilidade de cor e a rugosidade superficial de diferentes resinas compostas escovadas com dentifricios de diferentes niveis de abrasividade. Trinta discos de cada material foram obtidos utilizando compositos micro-hibridos (Brilliant NG e Charisma Diamond) e um nanocomposito (Filtek Z350XT). A cor inicial (CIELab) e a rugosidade superficial (microscopia confocal de varredura a laser) dos discos de resina foram avaliadas. Em seguida, 10 amostras por grupo foram escovadas com os dentifricios Maxima Protecao Anticaries, Sensodyne Repair & Protect e Colgate Sensitive Pro-Alivio. A escovacao foi realizada com uma escova eletrica com cabeca de cerdas macias, com potencia e peso padronizados, durante 30 minutos. A cada 30 segundos, 1,0 ml da pasta era injetada entre as cerdas da escova e a amostra. Apos o desafio abrasivo, as amostras tiveram sua cor e rugosidade reavaliadas. Os dados foram submetidos ao teste de Kruskal-Wallis (alteracao de cor) ou ao teste t (rugosidade da superficie) (α=5%). A escovacao nao alterou significativamente a cor dos compositos. Por outro lado, a rugosidade superficial dos compositos foi significativamente afetada pelo desafio abrasivo, independentemente do dentifricio utilizado. A alteracao da rugosidade superficial foi semelhante para todos os compositos. O desafio abrasivo com a Maxima Protecao Anticaries, o Sensodyne Repair & Protect e o Colgate Sensitive Pro-Alivio nao foi capaz de alterar significativamente a cor das resinas. Diferentemente, os desafios abrasivos alteraram significativamente a rugosidade superficial de todos os compositos avaliados. No entanto, as mudancas na rugosidade foram estatisticamente semelhantes nos compositos micro-hibridos e nanoparticulado. Palavras-chave: Resinas Compostas. Dentifricios. Cor.