Avaliação da rugosidade superficial de um cimento resinoso: efeito do sistema de acabamento e polimento e meios de imersão

Abstract

Introduction: Ceramic restoration methods present a resinous cement exposure area, as a consequence of their adhesive technique. It is possible to observe wear areas over the years. Note that the roughness of the materials is the major reason of adhesion of oral microorganisms. Objective: To evaluate, compare and analyze the roughness of the surface of a resin cement submitted to two types of finishing and polishing systems and to three chemical media. Material and Method: 36 samples of resin cement were made. After the preparation, they were taken to the rugosimeter to evaluate the initial roughness (Ra). Soon after, they were randomly divided into two groups according to the type of finishing and polishing system used. Then they were taken to the rugosimeter again for the second measurement. Subsequently, they were immersed in a cola drink, grape juice and artificial saliva for seven days. After this period, the samples were submitted to the third measurement of surface roughness. For morphological analysis, three samples from each group were submitted to scanning electron microscopy (SEM), immediately after the roughness measurements. Results: The lowest Ra was that os the first meansurement. Not all chemical means were able to change Ra. Only system 2 (S4P) was able to maintain the initial Ra pattern. Conclusion: Only the grape juice was able to cause significant difference in the roughness of the sample for system 2 (S4P), in addition, this same system was more effective when compared to system 1 (S2P).