Children’s tooth decay needs to be treated, and the treatment is mainly restorative. These restorative treatments are fluoride coating, cavity filling and crown restoration depending on the specific case. For milder cavities, only the enamel on the surface of the tooth is damaged. This is the mildest form of tooth decay. In this case, fluoride gel can be applied directly to the tooth surface. Fluoride treatment helps to restore the tooth enamel. It can provide the minerals needed to repair the tooth surface decay. For cavities that form a certain depth of cavity, crown treatment can be performed. This treatment involves creating a covering on the surface of the tooth’s biting surface to prevent further decay. Before treatment, the tooth needs to be debrided to remove necrotic tooth tissue. The fabricated crown is covered to the tooth surface with an adhesive substance to restore the normal shape and chewing function of the tooth. For deeper decay, fillings of some special materials may be used. As with crown restoration, the cavity inside the tooth needs to be cleaned before treatment. Then a dental special material made of composite resin or ceramic amalgam is filled into the cavity to restore the shape of the tooth and rebuild its complete structure. It is still necessary for children to have their teeth restored in a timely manner as tooth decay can lead to recurring toothaches, causing painful discomfort as well as affecting development and leading to an unattractive appearance.