The longevity of porcelain teeth is determined by a number of factors, including: the condition of the remaining teeth; the material used for porcelain teeth; the clinical treatment level of the doctor; and the patient’s oral hygiene maintenance and dietary habits. The doctor can only influence from the personal medical level, and the cooperation between the doctor and the patient is needed to obtain the best treatment results. Foreign literature reports that the five-year success rate of porcelain crown restoration is 90%, 15-20 years of restoration success rate of 50%-80%.