Most of the incisors can be replaced within 3 months. During the period of tooth replacement, most of the children can grow new teeth within 3 months after the loss of incisors if they have balanced nutrition. A small number of children may have slow growth of new teeth due to insufficient vitamin D or calcium in their bodies, but the growth of new teeth will not be more than 6 months in general. Children’s tooth replacement time is generally around the age of 6 years old, most of the lower jaw incisors, and then replace the upper jaw incisors, during the replacement of teeth should pay attention to a balanced diet, pay attention to oral hygiene, try to avoid eating too hard food, and avoid eating too much sweets before bedtime, to promote the healthy growth of teeth.