There may be many reasons for children’s teeth not growing for several months, such as trauma, dental caries, congenital missing permanent teeth and so on. 1. Trauma factor: some children do not reach the age of replacement of milk and permanent teeth, milk teeth because of bumping and other traumatic factors and fall out, in this state, permanent teeth may take a few years before eruption. 2. Dental caries factor: some children like to eat some sweets in daily life, and do not pay attention to oral hygiene, which will induce dental caries in the long run. When the teeth are decayed, it will also induce the teeth to fall out early and the permanent teeth will not erupt until a few months or even longer. 3. Congenital absence of permanent teeth: some children’s teeth fall out for a few months did not grow out, can not be ruled out is caused by congenital absence of permanent teeth. It is manifested by the fact that after the loss of milk teeth, the permanent teeth will not grow out again. If your child’s teeth have not grown out in a few months, you should go to the local hospital in time for a relevant examination, so that you can find the problem as early as possible and treat it as early as possible.