Dental crowns can be made of metal or non-metal, wherein the metal core is a metal crown, while the external part of the ceramic. Metal free crowns made of zirconium, which belongs to the group of ceramic materials of high strength and is known as an artificial diamond. Metal-free zirconia crowns, we recommend all patients who can not afford them, because they have impeccable biocompatibility, physical properties and aesthetics. It is often a combination of all-ceramic zirconia crowns in the anterior regions of the dental jaw and metal-ceramic porcelain crown in the last regions of the jaw, and one can notice the trend that more and more patients are opting for zirconia crowns. The key difference is that the metal as a base metal-ceramic crowns formed by hand, while zirconia crowns made machine with the help of computer based 3D scanning, leading to much more accurate engagement of the tooth.