Porcelain teeth are composed of metal and ceramic attached to the surface, which has the strength of metal and the beauty of ceramic, and are the most commonly used fixed dentures. Porcelain teeth commonly used in China can be divided into cobalt-chromium alloy, nickel-chromium alloy, titanium alloy, pure titanium, gold alloy porcelain teeth, etc. According to the metal used. The difference between porcelain teeth is mainly reflected in the difference in metal materials. Nickel-chromium alloy and cobalt-chromium alloy porcelain teeth are currently the most commonly used because of their relatively low price. However, nickel is a potential allergen, and there are still questions in the academic community about the safety of nickel in the oral cavity, so it is reasonable to avoid the use of nickel-chromium porcelain teeth when possible. Cobalt-chromium alloy does not contain nickel and is relatively inexpensive among porcelain teeth, making it a more cost-effective restoration method. Gold alloy has good biological properties, and the combination of ceramic is better than other metals, stable color, beautiful, economic conditions allow, choose gold alloy porcelain teeth is more appropriate. Pure titanium has excellent biological properties, but its combination with ceramic is relatively poor, so it should be used with caution when more teeth are missing and when you want to choose porcelain restorations.