The average life expectancy of a crown restoration is usually 8-10 years, but the exact duration of use varies from person to person. A crown is usually a restoration that covers the entire surface of a tooth, and is generally used in cases where it is difficult to repair a filling after tooth decay, after root canal treatment of a tooth, when the color or shape of a tooth is not ideal, or when a crown is broken due to trauma to a natural tooth, etc. In most cases, the tooth tissue needs to be ground down before it can be made. Depending on the material used to make them, they are mainly classified as metal crowns, resin crowns, all-ceramic crowns, porcelain crowns, etc. The average life span of a crown is usually 8-10 years, but it is affected by many factors, such as the amount of remaining tooth tissue, the length of the root, the maintenance of oral hygiene, and the patient’s eating habits. It is recommended to maintain good oral hygiene after crown restoration, try not to chew hard food with the affected tooth, review regularly, and seek medical attention when problems are detected in order to prolong the service life of the crown.