Baby teeth change old teeth did not fall out new teeth eruption if the old teeth loose obvious, can wait for self-off, if the loose is not obvious, can go to the hospital dentistry for extraction. Baby teeth, the old teeth have not fallen, the new teeth have come out, if the old teeth loose more powerful, obvious, generally do not need to carry out special treatment, mostly in a few days to fall off on their own, but also to give the baby to eat some relatively hard food, to promote the old teeth fall off. If the baby’s old teeth loosening is not obvious, you can consult a doctor in a timely manner, under the diagnosis of a professional doctor to choose the appropriate way to extract the teeth, so as not to cause dental irregularities or deformities. Baby teeth old teeth did not fall out new teeth eruption, there may be children lack of calcium and vitamin D, can be appropriate to supplement calcium and vitamin D, promote bone and teeth development; diet nutritional balance, eat some meat, eggs, soy products, as well as vegetables and fruits, and so on. There are many other reasons why a baby’s old teeth don’t fall out and new teeth erupt, so it is recommended to consult a doctor in time to have a specialized doctor evaluate and give targeted treatment.