Porcelain crown repair belongs to a fixed restoration, has been widely used in clinical practice, but because of its certain indications, the dental and periodontal conditions have a more stringent control, poor chewing habits and poor oral hygiene and self-cleaning of the patient is often not the first choice of the object, so not every case can be fitted with porcelain crowns. Besides, the metal materials used in the inner lining of porcelain crowns have a biocompatibility problem to be noted, and the porcelain crowns made of alloys containing nickel and beryllium, although less expensive, will induce allergic or toxic reactions in a certain percentage of the population. Fixed crowns and bridges should be fully adjusted after fitting, and any early contact will cause the abutment teeth to loosen and ultimately the crown and bridge restoration will fail and the abutment teeth will fall out. In a word, porcelain crown restoration, as the doctor should be careful to choose the case carefully design and production, as the patient is restored to care carefully use, but also pay attention to their own oral hygiene protection, respect for the doctor’s orders, change the improper chewing habits, to extend the service life of the porcelain teeth.