Abstract
Objective: To evaluate the influence of three methods of finishing and polishing on color stability of a microhybrid composite immersed in different beverages for 7, 15 and 30 days. Material and Methods: 90 samples were prepared and divided into three groups according to surface treatments (polyester matrix, aluminum oxide disc, sandpaper). The samples were divided for each group (n = 6) and immersed in one of the beverages: distilled water, red and white wine, red and white artificial grape juice. Pictures were taken at four time points: 0, 7, 15 and 30 days after contact with the dye. Color measurement was performed by computerized image analysis. La*b* values were obtained and color change (ΔE) was calculated. Results: Comparing beverages, red wine (ΔE =22.11±4.26) and red artificial grape juice (ΔE=8.24±1.70) showed greater color change in polyester matrix group, and finishing with aluminum oxide disc (ΔE=10.73±2.10) significantly prevent color change in red wine group. Conclusion: Aluminum oxide discs are the best option to minimize color changes in resin. White drinks are alternatives to color stability of composite resin. In the study time, composite resin demonstrated progressive discoloration when immersed in red wine and red juice. On the other hand, samples submitted to white beverages showed higher color stability.
Highlights
The aesthetic has occupied prominent place in dentistry and the material of choice for this purpose is composite resin, which besides giving a good aesthetic performance allows restoring to a proper function of the teeth
Color stability is a subject widely researched and there is a variety of studies showing that drinks such as red wine, cola, juices, teas and coffees are directly related to the surface staining of composite resins [5,6,7,8]
This study aims to evaluate the influence of three methods of finishing and polishing on the color stability of a microhybrid composite resin immersed in red and white wine, red and white artificial grape juice, for 7, 15 and 30 days
Summary
The aesthetic has occupied prominent place in dentistry and the material of choice for this purpose is composite resin, which besides giving a good aesthetic performance allows restoring to a proper function of the teeth. Color stability is a subject widely researched and there is a variety of studies showing that drinks such as red wine, cola, juices, teas and coffees are directly related to the surface staining of composite resins [5,6,7,8]. There are several specific methods to quantify color change in composite resins, such as spectrophotometers, colorimeters and digital image analysis techniques [15] These various mathematical forms attribute numbers to the color of the analyzed material and convert these numbers into three-dimensional coordinates [16], allowing it to be quantified and its variation to be precisely measured. This study aims to evaluate the influence of three methods of finishing and polishing on the color stability of a microhybrid composite resin immersed in red and white wine, red and white artificial grape juice, for 7, 15 and 30 days
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