Abstract
Objective: This in vitro study evaluated the effects of three polishing systems on the surface roughness of two ceromers. Material and Methods: 96 specimens (8 mm in diameter and 2 mm thick) were prepared in a metal mold using two restorative materials: CERAMAGE (Shofu, Japan) and VMLC VITA (VITA Zahnfabrik, Germany). The specimens were divided into 4 groups (n=12): G1: positive control, Mylar strip; G2: abrasive tips, Edenta system; G3: silicon tips, Enhance system; and G4: abrasive tips, Shofu system. The parameter evaluated was the average surface roughness (Ra) determined by using a profilometer SJ 301 (Mitutoyo, Japan), followed by photographic evaluation images through Scanning Electron Microscopy (SEM), with a 1000x magnification range. The data was subjected to statistical analysis for comparison between the groups (ANOVA, Tukey and Student T-tests), with a significance level of 5%. Results: there was a statistically significant difference between the silicone tip Enhance and the other groups for both ceromers with higher values of surface roughness. There was no statistically significant difference between the ceromers, except for the Shofu system, which showed lower values of surface roughness for Vita VMLC. Conclusion: Within the limitations of this study, it was concluded that the Edenta and Shofu abrasive tips are more effective in reducing the surface roughness of ceromers compared with the Enhance silicone tip.Keywords: Resins; Surface roughness; Dental polishing.
Highlights
A n important current requirement in dentistry is to provide aesthetics through metal-free restorations that restore the teeth’s natural appearance
The objective of this paper is to evaluate the effects of different polishing systems on the surface roughness of two ceromers: Ceramage (Shofu Inc., Japan) and Vita VMLC (Vita Zahnfabrik, Germany)
The results presented in this paper have shown that the systems with abrasive rubbers (Edenta and Shofu) obtained better results on the ceromers’ surface compared with the Enhance system silicon tips, which is a different result than that observed in the study by Nishioka et al.[9] in 2000, where the silicon tips system showed lower superficial roughness
Summary
A n important current requirement in dentistry is to provide aesthetics through metal-free restorations that restore the teeth’s natural appearance. The aesthetic requirement and the worry with appearance are imperative factors for a better social life. These aesthetics significantly improve self-esteem, explaining the reason for the increase on the demand for restorations that provide a natural appearance, biocompatibility, durability, and affordability[1]. Research studies have been conducted in an attempt to combine all these positive characteristics. This may attract more elaborate scientific attention to certain materials. Among these materials are indirect resins or laboratorymade compound resins[2]. These resins emerged on the second half of the 1990s as a secondgeneration of laboratory-made compound resin systems, or microhybrids, with the inclusion of ceramic particles, as described by Touati[3]
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