Color Stability of CAD/CAM Ceramics Prepared with Different Surface Finishing Procedures

作者：Burcu Kanat‐Ertürk · 发表于：Journal of Prosthodontics · 年份：2019 · DOI：10.1111/jopr.13019 · 被引用次数：97 · 研究领域：Dental materials and restorations、Dental Health and Care Utilization、Endodontics and Root Canal Treatments

PURPOSE: To investigate the color stability of zirconia-reinforced lithium silicate glass-ceramic and lithium disilicate reinforced glass-ceramic, which were prepared with various surface finishing procedures, following 1-week, 2-week, 1-month, and 2-month storage in various beverages, and after the application of polishing paste. MATERIALS AND METHODS: Lithium disilicate glass-ceramic (IPS e.max CAD HT) and zirconia-reinforced lithium silicate ceramic (Vita Suprinity HT) CAD/CAM blocks were sectioned with a diamond saw (Metkon) under water cooling into 1.5 × 7 × 12 mm dimensions (N = 120). All specimens were polished with silicon carbide paper (600-, 800-, and 1200-grit) under water for 120 seconds. The specimens were prepared using 3 surface finishing procedures: glaze, mechanical polishing, and external staining and glaze in accordance with manufacturers' instructions. Then, each group was divided into 2 storage subgroups, black tea and coffee (n = 10/group). Color values were measured in CIELAB color space with dental spectrophotometer (VITA Easyshade) at the initial stage, and following 1-week, 2-week, 1-month, 2-month storage, and after fine-grit polishing paste application (Proxyt). Color changes (ΔE) were calculated and statistically analyzed using ANOVA followed by Bonferroni corrected post-hoc tests using Number Cruncher Statistical System 2007 (α < 0.05). RESULTS: For lithium disilicate glass-ceramic, glaze procedure showed statistically lower color change values t...