The preservation of milk teeth generally refers to cases where you want to preserve them for a long period of time after they fall out during tooth replacement. The first thing to do is to remove any dirt such as blood from the milk teeth so that they are less likely to harbor bacteria. Secondly, you can cook the milk teeth in boiling water for 5 to 10 minutes or soak them in hydrogen peroxide for more than half an hour, and then place them in a clean container for preservation after they are dry. Milk teeth are very important for children, not only have aesthetic function and chewing function, but also can induce the normal position of permanent teeth eruption, at the same time, when the milk teeth have chronic apical inflammation, and do not timely treatment may affect the development of inherited permanent teeth. Therefore, parents are advised to pay attention to their children’s milk teeth to prevent them from decaying, which may further develop into chronic apical inflammation. Parents are advised to take their children to the dental department of a regular hospital for regular dental checkups.