There are direct and indirect methods for cosmetic restorations of anterior teeth. The direct method is to use composite resin to mold directly on the tooth, then light-cure, adjust the bite and polish. The direct method is more conservative and less damaging to the teeth, but it is very technically demanding and time-consuming for the doctor to obtain good restorative results. The current fees for direct method restorations in public hospitals are too low for practitioners to devote sufficient time and effort, so it is generally difficult to obtain good aesthetics and long-term prognosis. The indirect method is to make an impression of the tooth after preparation, and after filling the plaster model, the doctor designs the model and sends it to the mechanic’s office, where the technician makes the restoration according to the physician’s requirements, and then sends it back to the hospital after the restoration is made, and the physician tries it on and then bonds it to the tooth. The indirect method is time consuming, but because the restorations are made outside the mouth, high aesthetic results can be obtained and suitable restorative materials can be selected for processing, producing restorations with both highly realistic aesthetic results and a good long-term clinical prognosis. The main materials used for indirect cosmetic restorations are currently metal porcelain and all-ceramic materials. Metal porcelain has been used for a long time, ten years ago is the mainstream restoration technology, with a large number of cases, or a lot of problems. The biggest problem is the metal itself, no matter what kind of metal is used, after a period of time may lead to gray staining of the gums, the clinical manifestation is the gums around the restoration appear gray-black linear staining, seriously affect the restoration effect, to base metal porcelain is most common. Secondly, due to the opaque nature of the metal, the overall permeability of the restoration cannot reach the effect of natural teeth, the overall effect is not natural. Finally, because the domestic metal porcelain in the past to base metals, mainly nickel-chromium porcelain alloy, a few patients are allergic to this material, so the base metals are generally used cobalt-chromium alloy, the use of gold Z silver alloy or gold-platinum alloy rarely lead to allergies. In general, metal porcelain due to various shortcomings, it is currently believed that it can not meet the requirements of the cosmetic restoration of anterior teeth. However, due to the relatively cheap price, metal porcelain is still used in large quantities in primary hospitals, and its clinical results are basically acceptable if used properly. The current mainstream material for the aesthetic restoration of anterior teeth is all-porcelain materials, all-porcelain materials have developed rapidly in the last decade or so, the old materials were eliminated, new materials continue to emerge. At present, the most commonly used all-porcelain materials are two kinds, one is hot die-cast ceramic, the other is zirconia ceramic. Now introduce them separately. Currently the most widely used clinical hot die-cast ceramics is the product of the company, so far has developed to the third generation, the trade name emax, its main component is lithium disilicate reinforced glass ceramic, is currently the world’s most used anterior teeth cosmetic restorative materials, its characteristics are medium strength, material transparency is very good, you can get a high aesthetic effect. It is mainly used in clinical cases such as anterior porcelain veneers, anterior single crowns, and anterior three-unit fixed bridges. It is generally believed that the clinical results of veneers and single crowns are very good, while fixed bridges require strict selection of indications, otherwise bridge fracture is likely to occur. Therefore, emax is preferred for veneers and single crowns in the cosmetic restoration of anterior teeth. However, the emax material is more transparent, and in case of severe tetracycline teeth or teeth with deep discoloration, the color of the tooth cannot sometimes be completely obscured with emax, and other materials may need to be considered at this time. Zirconia ceramics are the most rapidly developing restorative material, whose main component is polycrystalline, highly pure zirconia. Its material characteristics are its very high mechanical strength, which makes it suitable for cases requiring high material strength. Due to its material specificity, zirconia restorations are now generally processed by the CAD/CAM method, which means that CNC machining equipment is used to cut the pre-sintered zirconia material, which is then sintered at high temperatures. There are many zirconia ceramics available in the market, including 3M Lava, Densply Cercon and Nobel Procera, which are generally more expensive. Zirconia ceramics are suitable for a wide range of applications, including single crowns for anterior and posterior teeth, multi-unit fixed bridges for anterior and posterior teeth, and are now being used more and more in implant restorations. The outstanding feature is the high mechanical strength of the material, which makes it suitable for almost all types of fixed restorations, except veneers, and the color masking performance of this material is better than that of emax, which is also suitable for severe discoloration cases. In addition to the above two materials, there are some other materials used in small amounts in clinical practice, such as cuttable glass-ceramics, powder-coated glass-ceramics, etc. These materials also have their own scope of application, so we will not go into details here. In short, the current anterior teeth cosmetic materials are mainly emax cast porcelain and zirconia ceramic, the former is outstanding aesthetic effect, medium strength, moderate price; the latter is very high strength, aesthetic effect is also good, more expensive, domestic materials moderate price.