After treatment, the nerve is removed from the back of the tooth, most often need to make a crown to protect it. After completing the crown restoration, the patient can as in the past, enjoy to taste a variety of delicious food, if there is no pain and other self-conscious symptoms, the vast majority of patients will not go to the follow-up, here, to draw your attention to is that the completion of the crown of the adhesive bonding, fixation, does not mean that once and for all, but also need to do a review every year, in addition to checking the status of the crown, but also to confirm the periodontal health, adjust the bite force size and distribution, if necessary, timely oral hygiene checks and guidance, especially for other teeth, the emergence of other teeth. If necessary, adjust the size and distribution of occlusal force, timely oral hygiene inspection and guidance, especially for patients with other teeth defects, missing teeth, review is particularly important. This will improve the efficiency of the crowns on the one hand, and maximize the service life of the crowns on the other.