To choose the right porcelain teeth, we must know the types and differences of porcelain teeth. Porcelain teeth are generally divided into metal porcelain teeth and all porcelain teeth. Metal porcelain teeth can be divided into non-precious metals and precious metals, and all-ceramic teeth can be divided into cast porcelain teeth and computer all-ceramic teeth. The materials they use are different, the processing technology is different, and the effect they achieve will be different. Therefore, the choice of porcelain tooth materials should be targeted. It is economical and practical to restore tooth function-although the price of non-precious metal porcelain teeth is low, the compatibility between non-precious metal porcelain teeth and tissues is poor and irritating, which may cause allergic phenomena and discoloration. It is not recommended for customers to choose porcelain teeth made of this material. Between non-precious metals and precious metals, its biocompatibility is better than that of non-precious metals, and it is also durable, which can avoid gum bleeding and gum blackening. But also economical and practical, and is suitable for the restoration of most teeth, especially for the fixed restoration of the fixed bridge of the posterior teeth. The strength of treating teeth is higher and there is no stimulation-pfm is the representative of precious metal porcelain teeth. In China, gold has been used as a filling material for a long time. It is one of the most ideal repair materials. It has the advantages of titanium alloy, higher strength and no irritation. Moreover, the combination of metal and porcelain is very firm and has better compatibility with tissues. Porcelain teeth don't turn blue where they touch the gums. In addition, porcelain powder can reflect its own color on the surface of gold, which makes porcelain teeth more beautiful and fully meets the requirements of cosmetic restoration. Have star-like teeth-all-ceramic teeth are divided into cast porcelain teeth and German computer all-ceramic teeth. The color of all-ceramic teeth can keep its natural color under light and natural light, so it has become the darling of dental beauty of film and television stars and public figures. All-ceramic teeth are completely composed of porcelain powder, which shows the color and layering to the greatest extent. Good durability, permanent preservation in the mouth, no metal substrate, light weight, only a quarter of the density of gold, more comfortable to wear; The thermal conductivity is low, only one seventeenth of that of gold, which is more conducive to protecting dental pulp health. The reflection and scattering of light are closer to natural teeth and have better aesthetic effect. Because of the high price of all-ceramic teeth, it is more suitable for the beauty needs of high-income class. (Beijing Stomatological Hospital)