For the replacement period of milk teeth loss for the normal phenomenon generally do not deal with, if it is the early loss of the gap can be made to keep the device, permanent teeth accidentally lost can be done to re-implantation or denture repair. 1. Molar tooth loss: if the tooth loss is normal, it is not necessary to deal with it; if the tooth loss is in advance, it may lead to malocclusion, so it is necessary to go to the hospital to make a gap retainer. 2. Accidental loss of permanent teeth: for permanent teeth accidentally lost due to trauma soon after the teeth can be reimplanted into the mouth, later root canal treatment to retain the teeth, if the teeth due to caries and other reasons for the loss of teeth, the need for late prosthetic restoration. Tooth loss is recommended to the hospital according to the specific situation of the teeth to deal with.