Crown restoration can generally last 7 to 10 years, but the specific service life needs to be based on personal habits of use, oral hygiene and restoration of dental crowns and other factors to determine the material. 1. Individual habits of use: after the crown restoration, it is generally recommended not to chew hard food, if individuals prefer to eat crunchy bones, nuts and other hard foods, it may lead to the phenomenon of chipping or peeling off the crown, so that the life of the crown becomes shorter. 2. Oral hygiene: dental crown repair, daily life should pay more attention to the restoration of health care, if poor oral hygiene, may lead to the edge of the restoration of secondary caries or periodontitis caused by buildup of dental calculus and other problems, thus shortening the service life of dental crowns; and good oral hygiene, dental crowns after restoration is generally able to use ten years, or even ten years or more. 3. Repair crown material: clinical crown repair material is mainly divided into two kinds of porcelain crowns and all-ceramic crowns, porcelain crowns may be free of metal ions, resulting in crowns do not fit and fall off the problem; and all-ceramic crowns edge of the gums basically do not produce stimulation, and hardness and wear-resistant performance is excellent, so the service life of all-ceramic crowns longer than the porcelain crowns. Dental crowns can last a few years after restoration, with the above description of several factors have a great relationship, it is recommended that usually pay attention to cleaning, follow the doctor’s instructions to use dental crowns.