“Microhardness, Gloss, and Aging of Crystal Ultra CAD/CAM Hybrid Material Compared to Other Restorative Materials”

https://pubmed.ncbi.nlm.nih.gov/38112735

The new CAD/CAM hybrid material, Crystal Ultra, has similar microhardness and gloss to other hybrid restorative materials, but lower hardness and gloss compared to glass-ceramic, and is affected by accelerated aging and coffee immersion.