Porcelain teeth have become the first choice for treatment and beauty because of its good fit and realistic color effect. But many friends in the clinic, the face of the many porcelain dental materials do not know how to choose? To select the right porcelain teeth, you must know the types of porcelain teeth and the difference, porcelain teeth are generally divided into two categories: metal porcelain teeth and all-porcelain teeth. All-porcelain teeth are divided into cast porcelain teeth and computerized all-porcelain teeth. Metal porcelain teeth are divided into non-precious metal, semi-precious metal and precious metal. They use different materials, processing techniques are also different, the results achieved will also be different. Therefore, the choice of porcelain dental materials should be targeted. All-porcelain teeth are divided into cast porcelain teeth and computerized all-porcelain teeth. The color of all-porcelain teeth can maintain the natural color no matter under the light and natural light, so it has become the first choice of the current film and television stars’ dental beauty. All-porcelain teeth are made entirely of porcelain powder, and the color and layers are maximized. Better durability, can be permanently preserved in the mouth, no metal base, light weight, density is only a quarter of gold, more comfortable to wear; low thermal conductivity, only one seventeenth of gold, more conducive to protecting the health of the dental pulp. The reflection and scattering of light is closer to natural teeth, with better aesthetic effect. Because of the higher price of all-ceramic teeth, it is more suitable for the high-income class of dental needs. The inner crown of precious metal porcelain teeth is composed of more than 80% gold and then an alloy with trace elements such as white gold or rhodium. Although the price is higher, but has significant advantages: because the gold alloy underlying the crown in the sun against the natural tooth luster, and good biocompatibility, safe to use; high degree of fit; porcelain and metal bonding is very good, there is rarely chipped porcelain. Non-precious metal porcelain teeth is made of nickel-chromium alloy metal crown outside the high-temperature porcelain, because of its relatively low price, so currently used in China more. However, this porcelain teeth have the following shortcomings: poor edge fit; poor biocompatibility with the human body, some patients wearing a period of time at the cervical edge of the gingival tissue will appear “black line”, in foreign countries there are even such porcelain teeth caused by allergic reactions reported in the medical records; In addition, because of the nickel-chromium alloy and porcelain thermal expansion coefficient does not match, so the clinical easier to chipped porcelain. So clinically easier to appear chipped porcelain phenomenon. Non-precious metal porcelain teeth also include cobalt-chromium porcelain teeth and pure titanium porcelain porcelain teeth. Cobalt-chromium porcelain teeth is an alternative to nickel-chromium porcelain teeth, does not contain nickel ions, there are no reports of allergies to cobalt-chromium porcelain teeth. It is also worth mentioning pure titanium porcelain porcelain teeth – this is a metal porcelain technology that has only been developed and matured in recent years. Titanium metal is a bio-metal and its most important feature is that it has no toxic side effects on the human body and is very biocompatible.