It is recommended to visit the dentist in time when the filled tooth falls out, because if the dentin is exposed in the mouth for a long time, it will be easy to produce secondary caries after food or bacterial invasion, and even pain will occur. If it develops into pulpitis, it is necessary to take the nerve to do root canal treatment, so the tooth is more damaged and the patient will be more painful. In addition, after the root canal treatment also need to do porcelain crown restoration, the treatment cost will also be higher. Therefore, when the filled tooth falls out, it is recommended to go to the dentist in time to re-fill the treatment and check whether there is secondary caries. If there is secondary caries, it is necessary to grind the tooth again to remove the decayed material and then fill the tooth again. If the caries is extensive, inlay restoration is also recommended, or porcelain crown restoration can be done. If the pulp has been exposed or the neighboring teeth are already carious, it is recommended to repair them at the same time to prevent recurrence of caries. And pay attention to regular checkups on weekdays, maintain oral hygiene, avoid chewing hard objects, resulting in fracture of the filling.