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The Effect of Simulated Gastric Fluid on the Color Properties of Hybrid-Ceramic CAD-CAM Restorative Materials
Purpose: The purpose of this study was to investigate the effect of simulated gastric fluid on color properties of CAD-CAM hybrid ceramic restoration materials. Materials and Methods: A total of ninety-six specimens in 1 mm thickness from seven different CAD-CAM hybrid ceramic restoration materials (Coltene Brilliant Crios, Yamakin İGOS KZR-CAD HR, Vita Enamic, Shofu HC ,GC Cerasmart 270, Ivoclar Tetric CAD, Voco Grandio) and CAD-CAM glass ceramic restoration material (IPS e.max CAD) were prepared using a low speed sectioning device (PRESI, Mecatome T180, France). After polishing, specimens were immersed in simulated gastric fluid for 24 hours. The quantitative color difference (ΔE) values between the test and control specimens were calculated before and after immersion to the mouthrinses. Data were analyzed using the statistical software and subjected to one-way ANOVA and a post hoc Tukey test were used for multiple comparisons (α=0.05). Results: The results of colorimetric analysis revealed that the simulated gastric fluid effects the color stability of CAD-CAM hybrid ceramic restoration materials. There were statistically significant differences in values of color difference (ΔE) of restorative materials (P<.001). Conclusions: Based on the results of the study, the colors of CAD-CAM hybrid ceramic restoration materials were affected by simulated gastric juice. The patients with gastroesophageal reflux disease should be warned by the dentists about the discoloration of the restorations which was made of CAD-CAM hybrid ceramic materials.