Resumo: Este trabalho avaliou a rugosidade e a topografia de superfície de resinas compostas submetidas a diferentes métodos de polimento. Foram utilizadas 5 resinas (Filtek Z350, Master Fill, Vênus, Charisma e Durafill VS) e confeccionou-se 90 corpos de prova distribuídos em 6 grupos (n:15): SP: sem polimento; TB: ponta de borracha abrasiva; DL: disco de lixa em três granulações; FP: disco de feltro com pasta diamantada; ECS: escova de carbeto de silício; PS: ponta de silicone abrasiva. Após os polimentos, foram realizadas as análises da rugosidade com auxílio de um rugosímetro e da topografia de superfície com a microscopia de força atômica. Os valores foram tabulados e analisados estatisticamente pelos testes de Kruskal-Wallis, DUNN e ANOVA (α = 0,05). As médias variaram entre 0,01 µm (Filtek Z 350 -TB) e 0,27 µm (Charisma -ECS). Concluiu-se que para todas as resinas testadas o melhor método de polimento foi o feltro com pasta diamantada (FP). Palavras-chave: Dentística operatória, materiais dentários, polimento dentário, resina composta.
Roughness and Atomic Force Microscopy of Composite Resins Submitted to Different Polishing MethodsAbstract: This study evaluated the surface topography and roughness of composite resins submitted to different polishing methods. Five resins were used (Filtek Z350, Master Fill, Venus, Charisma and Durafill VS) for preparing ninety samples, distributed into six groups (n=15): SP: no polishing, TB: abrasive rubber point; DL: sanding disc in three grits; FP: felt disc with diamond paste; ECS: silicon carbide brush; PS: abrasive silicon tip. After polishing, analyses of roughness with profilometry and topography with atomic force microscope were made. The data were analyzed using Kruskal-Walis, DUNN and ANOVA tests (α = 0.05). The averages ranged between 0.01 µm (Filtek Z350 -TB) and 0.27 µm (Charisma -ECS). For all the tested resin, the best polishing method was the felt disc with diamond paste (FP).
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