The dental prosthetics is a compensation for lost teeth and restoration of aesthetics, function and better health of our organism . In prosthetics we distinguish mobile and fixed prosthetics. Mobile prosthetics means the creation of mobile prosthesis (removable dentures). Depending on the number of missing teeth, dentures can be partial and total . Fixed prosthetics involves the compensation of one or more lost teeth by making crowns (covers), and bridges on existing teeth or on healthy roots of broken teeth or implants, and their permanent cementation (not removable) . There are metal ceramic, zirconium ceramic or pure ceramic crowns . Today, we give priority to non-metallic ceramics because of its biocompatibility and aesthetic superiority. Due to the computer technology (CAD / CAM), superior precision is achieved. By non-metallic ceramics we avoid possibility of occurrence of the dark edges that we encounter when we deal with metal-ceramic crowns (due to marginal shine of metals). There is no possibility of corrosion and release of metal particles. There are several types of non-metallic ceramics (eg e-max, empress, zircon ...). Given its composition and properties, as well as the method of production, each has its own indication.