If you have lost a small piece of the inner incisor, it is recommended to take different treatments according to the size of the missing tooth. 1. After a small piece of the inner incisor has fallen out, if the area of the defect is small and just licking it with the tongue produces a certain discomfort, you can go to the hospital stomatology department to adjust the grinding as well as polishing of the defective position, so as to alleviate the discomfort. 2. If the inner part of the incisor has fallen out of the dentin layer, you need to find an oral surgeon to prepare a cavity for the tooth gap in the shape of resistance and then use the filling material to repair the defective position. 3. However, if the missing area is too large and has affected the nerve of the tooth, it is necessary to carry out systematic root canal treatment on the tooth and then use the filling material for filling, and then finally do the porcelain tooth for crown restoration so as to prevent the risk of crown fracture of incisors and so on.