Metal and ceramic crowns
Dental crowns can be metal or non metal. Metals that are used in the manufacture of metal ceramic dental crowns are chromium, molybdenum or palladium (nickel is given up on due to allergic reactions). In the case of metal crowns, the name slightly deceives, because only their core is metal, while the outer part is ceramic.
Non metal crowns are made of zirconium, more precisely from zirconium dioxide (ZrO2), which belongs to a group of high-strength ceramic materials and should not be mixed with zirconium minerals, which is used for bijouterie. It is a zirconium oxide, which, except for artificial teeth, is used for artificial diamonds and other purposes where high endurance is required, so the zirconium crowns are stronger than metal ceramic ones. Besides zirconium, lithium disilicate ceramic crowns are also used.
They are made of full ceramics and they are intended for individual crowns and smaller tooth bridges in the front parts of jaws, however, for most patients, the zirconium crowns give the best overall results. Besides metal ceramic dental crowns, it is possible to make dental crowns of gold and titanium alloys, which is an option that has almost completely withdrawn from the practice due to high prices.
Advantages of zirconia crowns
Although metal ceramic dental crowns are still quite present in everyday dental practice, non metal crowns have made a revolution in dentistry. It was only with the appearance of a non metal ceramic crown that the crown was placed at the same aesthetic level as a completely healthy and properly formed natural tooth. Unlike metal ceramic crowns, artificial teeth with ceramic crowns are not transparent, they do not break the light in an unusual way and do not differ in the color from natural teeth.