Influência de vernizes fluoretados com concentração reduzida de fluoreto, suplementados ou não com trimetafosfato de sódio, na remineralização do esmalte bovino: estudo in vitro

• Autor(a) principal: Lima, Taynara Maria Toito de [UNESP]
• Data de Publicação: 2013
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/149529; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-01-27/000857612.pdf
• topic: Esmalte dentário; Cárie dentária; Flúor; Dental enamel

The aim of the present study was to assess the remineralizing capacity of fluoride varnishes supplemented or not with Sodium Trimetaphosphate (TMP), on dental enamel in vitro. Discs of bovine enamel selected through surface hardness (SH), were randomly divided into 7 experimental groups (n=12/group): placebo, 5% TMP, 2.5% NaF, 5% NaF, 2.5% NaF + 5% TMP, 5% NaF + 5% TMP and commercial varnish (Duraphat), following a blind protocol. After the induction of artificial carious lesions and determination of SH, the discs were treated once with the varnishes, being immediately immersed in a remineralizing solution for 6 hours. The varnishes were removed from enamel surface and the discs were then submitted to pH cycling, for 6 days. Following, SH, percentage of SH recovery (%SHR) and the integrated area of the lesion (ΔKHN) were determined. Data were analyzed by ANOVA and Student-Newman-Keuls' test (p<0.05). A dose-response relationship was observed between the %SHR and F concentration in the varnishes. The varnish containing TMP only led to %SHR similar to that obtained for the placebo. However, varnishes with F and TMP promoted %SHR significantly higher than that observed for varnishes with the same F concentration, without TMP. A similar pattern was observed for ΔKHN, so that the best results were obtained after using the varnish containing 5% NaF + 5% TMP, both on the surface and in the body lesion. It was conclude that the supplementation of fluoride varnishes with TMP led to a significantly higher effect in the remineralization of enamel artificial carious lesions in vitro in comparison to varnishes with the same concentration of F, without TMP