If a small piece of tooth is missing, if it is due to decay, the decayed part can be removed and then filled with a filling material, such as glass ionomer or light-cured composite resin. If a small piece is missing, due to abrasion, if there is space in the bite, you can choose to fill the tooth or choose to do an inlay restoration. If the pain is severe, a porcelain brace is used to restore the tooth by removing the model after grinding a small circle, making a porcelain crown and then attaching it to the tooth surface. If the tooth is persistently painful, choose to have the tooth root canal treatment, kill the nerve, and then restore the tooth with porcelain braces, which will ensure that the tooth has a strong resistance to fracture. If the tooth is missing a small piece of the tooth is the location of the cusp, can not be repaired, it is recommended to do desensitization treatment in a timely manner, so as to avoid the phenomenon of hot and cold sensitivity of the tooth.