As living standards continue to improve, people are demanding higher and higher restorative results from their dentures. Although many patients choose porcelain crowns this restoration, but the selection and use of its aspects or do not know much, the following is a detailed introduction to the practical knowledge of porcelain crowns! 1.What is a porcelain crown? The full name of the porcelain crown is porcelain fused metal crown, as the name suggests, is the choice of metal as the inner crown, and then the dental special porcelain powder by high temperature sintering on the surface of the metal crown, the formation of the shape of the real tooth-like full crown restoration. In addition, its color is based on the patient’s own teeth optional, so as to achieve harmony. 2.What are the advantages and disadvantages of porcelain crowns? Porcelain crowns are permanent restorations that have gained a lot of recognition for their high quality and high degree of simulation. Its biggest advantage is the ability to restore the form and function of the tooth, aesthetic effect is better, realistic appearance, smooth surface, color stability, good chewing function, strong resistance to fracture. In addition, porcelain crowns also have stable material properties, strong wear resistance, acid and alkali resistance, no odor, the price is lower than the all-porcelain crowns and other characteristics. Therefore, porcelain crowns are a more ideal restorative body. 3, porcelain crowns are divided into which categories? According to the different metal materials of porcelain crowns, mainly divided into three categories: precious metal alloy porcelain crowns, non-precious metal alloy porcelain crowns and pure titanium or titanium alloy porcelain crowns. Among them, precious metal alloys include gold-platinum-palladium alloy, gold-palladium-silver alloy, gold-palladium alloy, palladium-silver alloy and high palladium alloy, etc.; non-precious metal alloys include nickel-chromium alloy and cobalt-chromium alloy. 4.How to choose porcelain crowns? In the face of many kinds of porcelain crowns, how to choose, is often a very difficult problem for patients. In fact, people need to be based on aesthetic factors, biocompatibility, mechanical factors, economic factors and other comprehensive consideration. It is generally accepted that precious metal alloys are an ideal material for metal crowns, with advantages such as biocompatibility, casting performance, better edge fit and suitability. Precious metal alloys are corrosion resistant and less likely to lead to gingival gray staining, and their orange-yellow base color is close to the shade of human teeth and gum tissue, with good aesthetic and natural results. At the same time, the precious metal and porcelain bonding is very good, less chipped porcelain phenomenon, in addition, the precious metal for MRI no obvious interference, or can be removed by some ways and means interference. But the cost is relatively high.