Marginal Leakage of Composite Resins: microparticles, microhybrid and nanohybrid

• Autor(a) principal: Nunes, Osvaldo Benoni da Cunha
• Data de Publicação: 2011
• Outros Autores: Ramalho, Humberto de Sousa, Nunes, Nancy Alfieri, Abreu, Paulo Humaitá de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista da Faculdade de Odontologia de Lins (Online)
• Texto Completo: https://www.metodista.br/revistas/revistas-unimep/index.php/Fol/article/view/57
• topic: infiltração marginal; resinas compostas; nanopartículas..; marginal infiltration; composite resin; nanoparticles.

The objective of this research was to verify the degree of marginal infiltration in class-V,  vestibular, and lingual cavities in 40 recently-extracted human premolar teeth, divided into four groups, which, after the thermal cycle at 5ºC/55ºC, and stained with 2% methylene blue, were assessed in two ways: 1 - types of composite resin: microparticles (Silux Plus - 3M), microhybrid (Z 250 - 3M) and nanohybrid (Grandio - VOCO); and 2 - location of the cavity wall (occlusal enamel wall and gingival cement wall). The data were measured through scores of 0 to 4 and statistically analyzed by nonparametric Kruskal-Wallis test in order to demonstrate the composite resin and cavity wall that allowed less dye leakage. The three types of composite resin - microparticles, microhybrid, and nanohybrid - showed no statistically significant difference between them; nanohybrid resin showed the lowest scores of dye penetration. There was no statistically significant difference between the occlusal enamel wall and the gingival cement wall. However, the occlusal enamel wall was the one with the lowest scores of dye penetration.