The lack of growth after tooth replacement refers to the delayed eruption of permanent teeth after the loss of milk teeth during the tooth replacement period, which may be due to the absence of permanent tooth embryo or abnormal eruption of permanent teeth. 1. No permanent tooth embryo: no permanent tooth embryo means that the permanent teeth are congenitally missing, but the specific cause is unknown, which may be related to genetic and environmental factors. 2. Abnormal eruption of permanent teeth: the permanent tooth germ exists, but the eruption is abnormal, which is mostly related to local abnormal factors. For example, there are thick keratinized gingiva, cysts, supernumerary teeth and other obstacles, permanent teeth can not erupt. Or the early loss of milk teeth, neighboring teeth displacement to reduce the gap, can also lead to inherited permanent teeth eruption obstacles. It is recommended to go to the hospital in time after the replacement of teeth, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.