When milk teeth fall out and new teeth do not come out for a long time, parents should take their children to the hospital as soon as possible to let the doctor consult them. The first step is to observe the development of the new tooth through X-rays. If the child does not have a new tooth germ at all, it is impossible to grow a new tooth in this position, and a veneer should be used to replace the tooth at this time. If the new tooth has not yet emerged from the alveolar bone, pressure stimulation should be intensified to promote development. If the new tooth has grown out of the alveolar bone, but has not grown out, there is a layer of gum tissue covering the top, because of chewing food, long time friction, and make this layer of gum tissue thicker, harder, the new tooth will be more difficult to grow out, at this time should be used in a surgical method, the removal of the surface of the gum tissue, so that the new tooth grows out as soon as possible.