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Efeito de pastas dentífricas com carvão ativado na cor e microdureza do esmalte dentário
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Objetivo: Avaliar, laboratorialmente, a influência da escovagem bi-diária com duas pastas de dentes com carvão ativado, na cor e na microdureza do esmalte, em três tipos de dentes ao longo do tempo.
Materiais e métodos: 8 incisivos, 8 caninos e 8 pré-molares foram divididos em 6 grupos experimentais: 3 grupos foram escovados com a pasta da Primark durante 2 meses e os outros 3 grupos com a pasta do Celeiro. A microdureza do esmalte foi medida às 0 horas, 2 semanas, 1 mês e 2 meses, com um microdurómetro e uma ponta indentadora Vickers. A cor dentária foi determinada através de um método espetrofotométrico (VITA Easy Shade) e um método visual (escala VITA Classical) às 0 horas e aos 2 meses. Os resultados do ensaio de microdureza foram analisados com o teste de Friedman, seguido do teste segundo Mann-Whitney para avaliar a influência das pastas, e do teste de Kruskal-Wallis, para avaliar a influência do tipo de dente. Os resultados do estudo da cor foram analisados com ANOVA de duas dimensões, seguido de testes post-hoc de Student-Newman-Keuls.
Resultados: Relativamente à análise da microdureza, verificaram-se diferenças estatisticamente significativas entre a medição dos 2 meses e as restantes (p<0,05), não tendo sido detetadas diferenças estatisticamente significativas quer entre pastas quer entre tipos de dentes (p>0,05), em cada tempo estudado. Na análise da cor dentária, não foram detetadas diferenças estatisticamente significativas entre pastas (p>0,05) mas sim entre tipos de dentes, com os pré-molares a serem estatisticamente diferentes dos restantes (p=0,01) na medição após os 2 meses escovagem.
Conclusões: Verificou-se que a utilização das pastas dentífricas com carvão ativado testadas influenciou a microdureza do esmalte dentário, após 2 meses de escovagem bi-diária. Foram registadas alterações na cor dentária ao fim de 2 meses embora apenas nos incisivos e caninos testados.
Objetives: Evaluate, through a laboratorial assay, the effect that brushing twice a day with 2 different charcoal activated toothpastes has on color and microhardness of tooth enamel, after 2 weeks, 1 month and 2 months of brushing. Materials and Methods: 8 incisors, 8 canines e 8 pre-molars were separated in 6 experimental groups: 3 were brushed with Primark’s toothpaste and the other 3 with Celeiro’s toothpaste. Microhardness was evaluated at 0 hours, 2 weeks, 1 month and 2 months with a micro durometer. Tooth color was determined with a spectrophotometric method and with a visual method at 0 hours and 2 months. After the normality of the distribution was not guaranteed for the microhardness’ results they were analyzed with Friedman and Mann-Whitney tests. Tooth color results were analyzed with ANOVA and Student-Newman-Keuls tests since the normality was assured for this distribution. Results: There were statistically significative differences between the 2 months results and the rest of the times measured (p<0,05), though statistically significative differences between toothpastes or type of teeth (p>0,05) weren’t detected, on the microhardness tests, for each time studied. On tooth color analysis, there weren’t statistically significative differences between toothpastes (p>0,05) though pre-molars presented statistically different results comparing to incisors and canines, after brushing for 2 months. Conclusions: Toothbrushing twice a day with a charcoal activated toothpaste for 2 months, was proved to influence enamel’s microhardness values in this assay. Differences on tooth color were only achieved on incisors and canines.
Objetives: Evaluate, through a laboratorial assay, the effect that brushing twice a day with 2 different charcoal activated toothpastes has on color and microhardness of tooth enamel, after 2 weeks, 1 month and 2 months of brushing. Materials and Methods: 8 incisors, 8 canines e 8 pre-molars were separated in 6 experimental groups: 3 were brushed with Primark’s toothpaste and the other 3 with Celeiro’s toothpaste. Microhardness was evaluated at 0 hours, 2 weeks, 1 month and 2 months with a micro durometer. Tooth color was determined with a spectrophotometric method and with a visual method at 0 hours and 2 months. After the normality of the distribution was not guaranteed for the microhardness’ results they were analyzed with Friedman and Mann-Whitney tests. Tooth color results were analyzed with ANOVA and Student-Newman-Keuls tests since the normality was assured for this distribution. Results: There were statistically significative differences between the 2 months results and the rest of the times measured (p<0,05), though statistically significative differences between toothpastes or type of teeth (p>0,05) weren’t detected, on the microhardness tests, for each time studied. On tooth color analysis, there weren’t statistically significative differences between toothpastes (p>0,05) though pre-molars presented statistically different results comparing to incisors and canines, after brushing for 2 months. Conclusions: Toothbrushing twice a day with a charcoal activated toothpaste for 2 months, was proved to influence enamel’s microhardness values in this assay. Differences on tooth color were only achieved on incisors and canines.
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Saúde oral Teses de mestrado - 2019