Indications: 1. Various kinds of discolored teeth: At present, there are a large number of people suffering from tetracycline teeth and fluorosis teeth in China, and these colored teeth seriously affect one’s image. In addition, some teeth will gradually change color after pulp necrosis. These discolored teeth can be restored through porcelain teeth image of the teeth. 2, malformed teeth and enamel hypoplasia teeth: some teeth are too small or distorted shape, and some teeth have a rough appearance and sometimes chalky white, these teeth can also be restored to normal form and color through porcelain teeth. 3.Cavities or large defects: Some teeth are not treated in time after decay, resulting in a large area of tooth loss, so that the use of general filling method for treatment, the teeth are prone to splitting, filling materials are also easy to fall off. When you encounter such teeth, you can consider making porcelain teeth, which can restore the normal form and protect the normal tooth tissue underneath with porcelain teeth. 4.The front tooth decay is not good enough to be repaired by other methods: As the front teeth are exposed when laughing, the beauty of front teeth is especially important among all teeth. The front teeth, especially the central incisors, are one of the teeth that are easy to be decayed, and some restoration methods are not satisfactory after the front teeth are decayed, either the hardness is not enough or the shape is not ideal. In this case, you can choose porcelain teeth. 5, misalignment, twisted teeth: many people have individual teeth misalignment or twisted, if it is the back teeth is better, if it is the front teeth misalignment or twisted will also affect a person’s image. Contraindications: 1, for the younger, permanent teeth have not been fully developed is not considered to make porcelain teeth. Such patients can temporarily use other restorative methods to repair, to be fully developed permanent teeth and then replaced with porcelain teeth. 2, the teeth are too small, their own strength is poor, can not withstand a certain bite force of teeth. Such teeth, even if they are barely porcelain teeth, and later easy to fall off. 3, serious deep overlap, bite tight. This situation is difficult to set aside enough space for porcelain crowns.