When the teeth are not falling out, it means that the milk teeth are stagnant, according to the situation, you can choose to observe temporarily or remove the milk teeth, in order to facilitate the normal eruption of the permanent teeth. 1. Temporary observation: the replacement teeth have just erupted in the mouth, in this case, you can not remove the milk teeth, but recently you can eat more hard food to promote the root resorption of the milk teeth, but also conducive to the development of jawbone, so that the permanent teeth can be erupted normally. 2. Extraction of milk teeth: the replacement teeth have completely erupted out of the oral cavity and tilted, in this case, the milk teeth are extracted in time, and the tilted permanent teeth can usually return to the normal position gradually. If your teeth don’t fall out when you are replacing them, you should go to the hospital in time, and after the professional doctor’s examination, the milk teeth will be extracted in time to facilitate the normal eruption of the permanent teeth.