Stain susceptibility of composite and ceramic CAD/CAM blocks versus direct resin composites with different resinous matrices

摘要: To evaluate the stain susceptibility of CAD/CAM blocks and direct composite after long term exposure to various staining agents. 40 disk-shaped samples were fabricated from each nine materials; six (Vitablocs Mark II, Paradigm MZ100, Experimental Vita Hybrid Ceramic, Enamic, Kerr Lava Ultimate) three composites (Filtek Supreme, Venus Diamond Filtek Silorane). Samples randomly divided into five groups (n = 8) according different solutions (distilled water, tea, red wine, coffee artificial saliva). Initial L*a*b* values assessed using a calibrated digital spectrophotometer. Specimens immersed in stored an incubator at 37 °C for 120 days. again color change (∆E) was calculated as difference between recorded values. ANOVA, Duncan test used identify differences (α 0.05). Significant ∆E detected materials (p 0.000). Among all solutions, highest value observed with wine. The new (Vita Ceramic showed resistance compared MZ100 resin blocks. Silorane, composite, high other composites. had lower than methacrylate based composite. Staining Enamic Ultimate comparable feldspathic ceramic II). Silorane promising results that some