Color stability of CAD/CAM hybrid versus leucite -reinforced ceramic blocks: an in vitro study.
Journal Title: Medicine in Evolution - Year 2018, Vol 0, Issue 3
Abstract
Purpose. Aim of the present study is to compare the color stability of CAD/CAM hybrid and glass ceramic blocks, after immersion in different beverages. Material and methods. CAD/CAM leucite reinforced ceramic blocks (Empress CAD, Ivoclar) and hybrid ceramic blocks (Cerasmart, GC) were cut in 2mm thick samples. A total of 20 specimens, 10 of each group of material, were prepared and immersed in five different beverages (coca cola, green tea, coffee, red wine and distilled water-control). After one month of storage at constant temperature (370C), the samples were analyzed with a spectrophotometer. Results. Color changes (ΔE) after immersion of CAD/CAM blocks in different beverages were calculated. Compare to distilled water, a clinically detectable difference of color (ΔE >3) was found for coffee, red wine and green tea for both test groups. Conclusion. Within the limitation of this study, it can be concluded that usual beverages may affect the color stability of CAD/CAM hybrid and glass ceramic blocks, which may consequently compromise the esthetics of restorations.
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