Once a tooth has been treated and the pain has been removed, the next thing to consider is how to protect it. The most common and effective method is to make a crown, which can be made of different materials depending on the need. The crown is fixed to the affected tooth with a special dental bonding agent. A crowned tooth is not a permanent restoration, but requires careful maintenance to prolong the life of the affected tooth. To illustrate, first of all, the tooth is the basis for carrying the crown, and the factors that are most likely to cause damage to the tooth are by and large caries, periodontal disease and excessive occlusal forces. Therefore it is crucial to keep and maintain oral hygiene, which includes mastering the correct and effective brushing method and receiving regular oral examinations. Crowns are mostly made of metal or porcelain, although hard, there is also wear and tear, especially porcelain crowns are brittle and can be damaged when biting hard objects, and it is not easy to repair in the mouth, so after the crown restoration, you should also avoid biting hard objects, causing damage to the crown. Of course, the crown also needs to be kept clean.