All-ceramic crowns are a high-tech method of veneering that has only been developed in recent years. It involves making an inner crown on the root of the treated tooth, which is a layer of all-ceramic clear supporting bone, and then baking a layer of porcelain powder similar in color to that of the natural tooth on its outer crown surface, which is finally bonded to the tooth. The demand for all-ceramic restorations has been on the rise globally over the past decade, especially in developed countries. According to a survey by the German “Oral Ceramics Research Society”, more than one million dental restorations were made with all-ceramic materials in Germany alone in 2002. Is this phenomenon a sign of patients’ mature aesthetic sense, or is it a sign of ever-increasing biocompatibility requirements? What should be known is that the use of any metal in the oral cavity has an effect on our body in one way or another. Whereas ceramics are suitable for rehabilitation within the human body, metals can only be used as substitutes. This opinion is based on the fact that the use of ceramics is significantly different from the use of metals in restorations. Compared to their restorative materials, ceramics are physically neutral in the oral cavity, harmonize very well with the biological structure of the human body and are highly biocompatible. In dental alloys, common alloys such as nickel-chromium alloys are often allergic, and in severe cases can cause other diseases. Even the use of precious metals for dermatological testing can increase the number of allergic cases. The application of ceramics, so that this material on the human body of all kinds of risk is almost zero, which is the majority of dental workers to pursue the goal, but also by the oral diseases of the patient’s dream. What is CAD/CAM, CAD means computer-aided design; CAM means computer-aided manufacturing. That is to say, this material for zirconium dioxide crowns in addition to the need for doctors to grind the teeth (tooth preparation) and the final wear of the teeth when the bonding, the rest of the design and production of all by the computer to complete. The advantages of zirconium dioxide are: 1. Zirconium dioxide is a mineral that exists in nature as plagioclase zirconia. Medical zirconium oxide after cleaning process, in the zirconium retained a small amount of alpha ray residue, its penetration depth is very small, only 60 microns; 2, density and strength is very high: (1) strength than the EMPRESS II 1.5 times; (2) strength than the INCERAM zirconia more than 60%; (3) unique resistance to rupture and cracking after the curing performance of the strong; (4) can be made 6 units of (4) Porcelain bridge can be made for more than 6 units, which solves the problem that all-porcelain system can not make long bridge. The natural feel of tooth color and inconspicuous crown margins are also benefits of using zirconia all-ceramic restorations. In particular, patients with high aesthetic requirements pay more attention to the advantage of its natural color, because this makes the restoration and healthy teeth are one and the same, it is difficult to distinguish between them; 4, did you know that? If the dentures set in your mouth are metal-containing porcelain crowns, they will be affected or even removed when you need to do cranial x-ray, CT, MRI. Non-metallic zirconium dioxide does not block the x-ray, as long as the zirconium dioxide porcelain teeth, the future need for cranial x-ray, CT, MRI do not need to remove the dentures, saving a lot of trouble; 5, zirconium dioxide is an excellent high-tech biomaterials. Zirconium dioxide is an excellent high-tech biomaterial with good biocompatibility, superior to various metal alloys, including gold. Zirconium dioxide has no irritation and allergic reaction to the gums, which is very suitable for application in the oral cavity, avoiding the allergy, irritation, corrosion and other adverse reactions produced by the metal in the oral cavity; 6, zirconium dioxide material and other all-ceramic restorative materials compared to its strength advantages so that the doctor does not have to excessively abrade the patient’s real teeth, can achieve a very high level of strength, of which Vita all-ceramic plus yttrium stabilized zirconium oxide is called ceramic iron and steel; 7, Zirconium dioxide porcelain teeth have very high quality, said its high quality not only because of its materials, equipment is expensive, but also because of its use of today’s most advanced computer-aided design, laser scanning, and then by the computer program control grinding and production, perfect; 8, based on the above advantages, zirconium dioxide has been set a million favorites, looking ahead, this high-quality ceramic materials will become the future of cosmetic dental restoration trend. Looking ahead, this high-quality ceramic material will become the future trend of cosmetic dental restoration, and we hope that you, who are deeply troubled by oral diseases, can really smile more brightly. All-ceramic dentistry is a high-tech method of veneering that has only been developed in recent years. It is to make an inner crown on the root of the treated tooth, which is a layer of all-ceramic transparent support skeleton, and then bake a layer of porcelain powder similar to the color of natural teeth on its outer crown surface, and finally bonded to the tooth. All-ceramic teeth have a wide range of indications, and can be used to restore severe oral malocclusion, gaps, tetracycline, fluorosis, malocclusion, and a variety of roots that cannot be filled with porcelain. In recent years, all-ceramic porcelain tooth restoration has become the new fashion of modern dental aesthetics, especially adapted to severe tetracycline teeth and missing teeth. The fabrication of all-ceramic teeth is similar to that of porcelain. In the production, the doctor will recommend the good teeth on both sides of the missing teeth as abutment teeth, grinding away about 1/3 of the tooth tissue, however, all-porcelain teeth to be relatively less than the porcelain teeth to grind away the tooth tissue, and painless: 1, all-porcelain teeth due to the absence of metal base crowns, effectively avoiding the emergence of metal allergies and gums black line and other problems, no toxic side effects on human health; 2, all-porcelain teeth good transparency and Gloss is better. Form and color more natural and realistic; 3, and metal porcelain teeth comparable to the compressive strength, do not have to worry about the phenomenon of porcelain chipping; 4, less grinding, a greater degree of retention of their own dental tissues. Wear all-ceramic teeth should pay attention to: 1, the first time to wear porcelain has mild discomfort, patients should be patient to practice the use of, and gradually adapt to; 2, the first time to wear a soft food, adapt to and then eat normal food; 3, to maintain oral cleanliness, develop the habit of brushing teeth after meals; 4, with inappropriate or oppression of mucous membranes caused by the pain, should be timely follow-up repairs. The definition of all-ceramic is a porcelain restoration without a metal crown. The advantages of all-ceramic are: good biocompatibility, no allergic reaction to people, edge fit, good transparency, aesthetic and natural after restoration. With the development and progress of technology, the hardness of all-ceramic products is gradually improved to make up for the lack of hardness. Currently in the clinical application of all-ceramic types are: 1, slurry coated all-ceramic: refers to the refractory generation of molded alumina or zirconia slurry, and then high-temperature shaping to form the bottom of the crown. 2, cast and pressed all-porcelain: the first wax to make a crown or bottom crown of the generation type, embedded in the circle in the special porcelain furnace temperature de-waxing, in the finished porcelain melting through the pressure cast into the circle. Porcelain components for lithium-based ceramics. 3, cast all-ceramic: centrifugal casting porcelain crown or full crown. Porcelain composition for the * mica silicate typical products: the United States DENTSPLY (DICOR). 4, computer cutting and grinding all-ceramic: the use of CAD / CAM system, after the computer-aided design system scanning model, computer-aided processing system will be semi-finished alumina or zirconia block cutting and grinding into the bottom of the crown type in the firing. 5.Computerized porcelain deposition of all-ceramic: alumina or zirconia powder as a paste, through computer-aided design and auxiliary processing deposited in the refractory generation type to form the inner crown, and then burned at high temperatures. 6, porcelain crown: the use of special porcelain powder directly in the fire-resistant type on the pile of porcelain crown. All-porcelain teeth superior performance performance: 1, no black line on the edge of the gums, no sense of thickness, no gum redness and bleeding phenomenon, so that you really feel that the porcelain teeth are from your own gums out of the growth; 2, with the real teeth to match the translucence, no longer in the light, “green teeth flash” embarrassment; 3, with the metal of porcelain teeth comparable to compressive strength The phenomenon of porcelain chipping and cracking; 4, no undesirable metal ion exudation affecting your health; 5, less grinding, a greater degree of preservation of their own dental tissues.