Avaliação in vitro da capacidade de materiais que liberam trimetafosfato de sódio associado ou não ao fluoreto em promover a remineralização

• Autor(a) principal: Gaban, Gabriel [UNESP]
• Data de Publicação: 2012
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/149454; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2017-01-27/000855635.pdf
• topic: Materiais dentários; Fluoreto de sódio; Fosfatos; Dental materials

The purpose of this study was to verify in vitro the capacity of materials which release sodium trimetaphosphate (TMP), associated or not with fluoride, in promoting remineralization in artificial caries lesion in enamel. Forty-eight enamel blocks (4x3x3 mm) obtained from bovine incisors were selected through the initial surface hardness test (SH1). Artificial caries lesions were induced on the blocks surface and, then, the post-demineralization surface hardness (SH2) was determined. For each material to be analyzed, 12 specimens were fabricated: without TMP and sodium fluoride; without TMP and with 1.6% sodium fluoride; with 14.1% TMP with or without 1.6% sodium fluoride. These specimens were adjusted to the enamel blocks and submitted to pH cycling to promote the remineralization. After cycling, final surface hardness (SH3) test was conducted on the specimens in order to calculate the percentage of surface hardness recovery (%SHR) and the concentration of fluoride (μg F/mm3) on enamel was determined. The results were statistically analyzed considering as variation factors the materials and the variables: percentage of surface hardness recovery (%SHR) and fluoride concentration (μg F/mm3) on enamel. The %SHR data obtained was considered heterogeneous and, for this reason, were submitted to the Kruskal-Wallis test followed by the multiple comparison test of Student-Newman-Keuls. The μg F/mm3 data obtained after logarithmic transformation and homogeneity verification were submitted to the Variance Analysis (ANOVA) followed by the Bonferroni test. The significance level established was 5%. Control and TMP 14.1% groups presented lower %SHR (p=0.609) and statistically different from groups NaF and TMP 14.1%+F (p<0.001), which were statistically similar (p=0.531). Control and TMP 14.1% groups...