If the teeth lost are milk teeth or permanent teeth, as long as there is no congenital permanent tooth germ loss, the teeth lost can grow. If the adult has already changed teeth, the big teeth lost are permanent teeth, usually can not grow new teeth again. 1, milk teeth: children around 6 years old began to lose their milk teeth, permanent teeth gradually erupted, if the big teeth fall off naturally at this time, can grow new big teeth in the original position, at this time may occur pain, gum edema, discomfort and other symptoms, parents can help children to establish good oral hygiene habits to protect the newly erupted permanent teeth; if the milk teeth because of special factors unnatural lost, age under 6 years old, need to wait until the normal physiological tooth replacement age after 6 years old, will sprout new teeth, do not need to worry too much; 2, permanent teeth: adults lost most of the big teeth is due to external factors, disease factors, if the big teeth lost for permanent teeth, it is impossible to grow new teeth, at this time need to determine whether the big teeth completely lost, you can go to the hospital The doctor will observe the tooth or perform an x-ray to determine whether there are residual roots and crowns. If there is any residue, the remaining tooth should be extracted and restored by a method such as dental implant. If half of the tooth is lost and the pulp is not injured, restorative treatment can be performed; if the pulp is injured, root canal treatment with full crown restoration is required if necessary; if the wisdom tooth gradually erupts as we grow older, we can also try to replace the big tooth by moving it forward through orthodontic treatment. Therefore, patients are advised to avoid external damage to the teeth in their daily life, pay attention to oral hygiene and care for their teeth.