Prosthodontics crown materials have the following options: zirconia all-porcelain, all-zirconia crown, aluminum oxide all-porcelain, cast porcelain all-porcelain, gold alloy porcelain, gold alloy casting, nickel-chromium alloy porcelain, nickel-chromium alloy casting The following is introduced one by one: 1, zirconia all-porcelain (6200 yuan): zirconia is currently the hardest material in the oral non-metallic category. The advantages of this all-porcelain crown is the crown does not contain free metal components, there is basically no stimulation of soft tissue; processing process for computer-aided cutting, high precision, crown edge fit is good; application in some front teeth discoloration, front teeth defective large use of metal pile core repair when the ability to cover color. The disadvantage is that the cost is higher. 2, full zirconia crown (6200 yuan): zirconia all-porcelain crown applied to the posterior teeth when the surface layer decorative porcelain strength is relatively low, there is a risk of chipped porcelain. At this time, you can choose full zirconia crown, can take into account the strength and tissue compatibility, but the disadvantage is that the surface color gloss relative to ordinary decorative porcelain crown is poor, color uniformity, but at least white. 3, alumina all-porcelain (5400 yuan): anterior teeth can choose alumina all-porcelain material, the same as 1 no stimulation of soft tissue, but the ability to cover the color is worse than zirconia all-porcelain, can not be applied to the metal pile core of the anterior teeth. The machining process is also computer-aided cutting. But currently can only be sent to Sweden for crown processing, the cycle is very long, moving more than a month. 4, cast porcelain all-porcelain (5400 yuan): the best choice of crown material for the aesthetic effect of the front teeth, color matching, the best transparency. There is basically no stimulation of soft tissue. The first choice for aesthetic restoration of anterior teeth. However, the ability to cover the color is a little worse, can not be applied to the metal pile core of the anterior teeth. 5, gold alloy porcelain (about 3800 yuan): is a kind of metal porcelain crown, the inner crown is gold alloy, the outer crown is decorative porcelain. Can be applied to any full crown restoration. 6, gold alloy casting (about 2,500 yuan): all-metal cast crown, this material used in the posterior teeth can not see the tooth position is very suitable. All-metal crowns have a small amount of tooth grinding, and the softness and hardness are closest to natural tooth enamel, so long-term use will not cause wear on the opposite tooth. At the same time, gold alloy is less irritating to soft tissues and has a high degree of fit. Strong and durable, it is the first choice for the non-aesthetic area of the posterior teeth and has the highest cost performance. 7, nickel-chromium alloy porcelain ($840): is a kind of metal porcelain crown, the inner crown is nickel-chromium alloy, the outer crown is decorative porcelain. It should be noted that this material has a certain amount of stimulation and staining of the gums. Foreign literature reports that 10% of people are allergic to nickel, and it is eliminated in foreign medical institutions and domestic clinics. The advantages are clear: cheap. 8, nickel-chromium alloy casting ($460): nickel-chromium alloy all-metal casting crown, excluding the stimulation of the gums and staining, allergy problems, the hardness of this material relative to gold alloy full crown is quite high, easy to cause wear and tear of the opposite tooth, economic conditions allow the case is not recommended.