Avaliação da rugosidade superficial após escovação com dentifrícios clareadores: um estudo in vitro
Objective: To evaluate the change in enamel surface roughness after using different whitening dentifrices when compared to a conventional dentifrice. Methodology: 40 bovine incisors free of pigmentation and fractures had the buccal surfaces cut in an area of 5 x 5 mm, being included in PVC pipes 25...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/52569 |
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| Resumo: | Objective: To evaluate the change in enamel surface roughness after using different whitening dentifrices when compared to a conventional dentifrice. Methodology: 40 bovine incisors free of pigmentation and fractures had the buccal surfaces cut in an area of 5 x 5 mm, being included in PVC pipes 25 mm wide by 10 mm high with the aid of a glass plate, double tape face and self-curing acrylic resin. The dental enamel on the buccal surface was flattened with 360, 600 and 1200 grit sandpaper and the final polishing was done with felt disks, with the initial roughness measured using a 3D optical profile meter. The specimens were immersed in black tea for 1 hour/day, for 15 days, for staining. The samples were randomized into 4 groups according to the tested products: group C (conventional dentifrice); group PH (1% hydrogen peroxide dentifrice); group S (silica-based dentifrice); and group CA (activated charcoal-based dentifrice). The specimens were coupled to the simulated brushing machine in contact with the dentifrice of each group in the form of a suspension and a new analysis of surface roughness was carried out. For statistical analysis, data were submitted to Jamovi version 1.6 and after descriptive analysis, the Shapiro-Wilk normality test was applied, followed by ANOVA two criteria for repeated measures and Tukey's post test, with a significance level of 5%. Results: In the intragroup analysis, there was a statistically significant increase in surface roughness when compared to the initial one for the activated charcoal-based dentifrice group (p<0.001). Despite this, in the intergroup analysis, there was no statistically significant difference between the groups in terms of roughness values before or after simulated toothbrushing. Conclusion: The whitening dentifrices showed the ability to change the surface roughness of the enamel in a similar way to the conventional dentifrice. Longitudinal studies are needed to assess the effects of long-term use of whitening dentifrices. |
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