Children who have lost their incisors will usually grow new teeth in about half a year, depending on their physical condition and growth and development, with the earliest being 1-2 months and the latest being no more than 1 year. Children’s incisor replacement usually occurs around the age of 7 years, the newborn permanent teeth to replace the already lost milk teeth. If the loss is physiological, new teeth can be grown within half a year; if the loss is abnormal, such as apical periodontitis, serious caries or a history of trauma, etc., which may lead to premature loosening of the teeth, root resorption, and loss, which will often delay the eruption of the new teeth, it is recommended to go to the Children’s Dentistry of the regular hospital as soon as possible, and appropriate treatment will be given in a timely manner. If the incisors have not been erupted for half a year, it is recommended to complete the relevant examinations in order to determine whether there is any abnormal eruption of permanent teeth. If the newborn incisors fall out again, there will be no more teeth eruption and restorative treatment is needed. Children should pay attention to the reasonable diet, eat more calcium-rich food, such as milk, eggs and so on. Usually keep oral hygiene, develop a good habit of brushing their teeth in the morning and evening and rinsing their mouths after meals.