1. Exnt Aesthetics: It looks just like real teeth due to its well light translucency, and it can be customize accordingly. 2. Exnt Precision and Margin Fitting: Ziuconia crown is make by CAD/CAM. laser scanning and then grinding by computer control program to ensure the coping is accurate and margin fitted. 3. Exnt Biocompatibility: No stimulation to gum, low thermal conductivity,benefit a lot at protecting dental pulp,more comfortable to wear.