A good alternative to metal-ceramic crowns are metal-free ceramic crowns Empress. To increase the strength in the molded glass-ceramics, of which are made this kind of crowns, is added leucite crystals. Empress crowns are used for front teeth prosthetics because look very aesthetically, but the strength is equal to metal-ceramic crowns.
The main advantages of crowns Empress:
accuracy of fit,
biocompatibility with the tissues of the gums,
good selection of color and shape of natural teeth,
resistance to abrasion and wear,
good resistance to microorganisms, dyes and aggressive substances.