During the period of tooth replacement, attention should be paid to whether the milk teeth are retained or lost prematurely There is a certain time and sequence for the milk teeth to fall out, which should fall out but not fall is called milk teeth retention, the consequence of which is often permanent teeth can not erupt in the normal position. Most children start to replace their teeth at the age of five or six, while some start at the age of four, and some children lose their first milk teeth as late as 7-8 years old. When you find that your child’s baby teeth have not yet fallen out and new teeth are coming in from the side, it looks like a “double row of teeth”. If the baby teeth fall out before they should, it is called premature loss of baby teeth, which often causes the neighboring teeth on both sides to tilt toward the gap, making the gap smaller and the permanent teeth to erupt in the wrong place due to insufficient gap. At this time, a gap retainer (made by a pediatric dentist) should be worn at the gap of the baby teeth to prevent the teeth on both sides from tilting, so as to maintain the proper eruption position of the permanent teeth until the permanent teeth erupt. During the period of tooth replacement, attention should be paid to whether there is difficulty in the eruption of permanent teeth. When the baby teeth are lost too early, the child is used to chewing and licking with the dental bed, and the dental bed will become fat and prevent the eruption of permanent teeth. Therefore, if the child has reached the age of tooth replacement and the permanent teeth have not yet erupted, you should take the child to the hospital for a timely examination to obtain the doctor’s help. Mild crowding and twisting when permanent teeth erupt is a normal phenomenon. During the period of tooth replacement, we should pay attention to prevent and treat the caries of milk molar. During the period of tooth replacement, milk molar is easy to suffer from caries, such as caries causing apical disease, which can affect the growth and eruption of inherited permanent teeth, so we should pay attention to the timely treatment and prevention of milk molar caries, and we must not have the wrong concept of “milk teeth have to be replaced sooner or later, and there is no need to treat when they are bad”. When changing teeth, you should eat more chewy food. When children are about six or seven years old, their permanent teeth will start to erupt one after another to replace the original milk teeth. Some children’s permanent teeth have erupted, but the milk teeth often refuse to “give way”, forcing permanent teeth have to grow from the inner side of the milk teeth, forming a “double layer of teeth”, resulting in permanent teeth alignment is not neat. There are many reasons for the delayed loss of milk teeth, the most common being that children eat too finely and do not give full play to the physiological stimulation of their teeth. The main function of teeth is to chew food, and chewing food can promote the growth and development of the roots of milk teeth as well as natural resorption and loss. Therefore, as children grow older, they should be allowed to eat more chewy food to maintain good stimulation of the milk teeth and encourage them to fall out on time. When the child’s incisors and posterior molars have erupted, you can add some celery, corn, apples and other foods to make the tooth replacement complete smoothly. During the period of tooth replacement, the milk teeth and permanent teeth coexist, and the permanent teeth have just erupted, especially the “six-age teeth” which are the “key to bite”, with large volume and many sockets on the bite surface, which are easy to retain food residues, and most children do not brush their teeth thoroughly, so caries often occurs easily. In addition, most children do not brush their teeth thoroughly, so caries often occurs easily. At this time, the most important thing is to teach children to brush their teeth correctly. During the period of tooth replacement, when the milk teeth are loose and about to fall off, children often use their tongue to lick the loose teeth, which is a bad habit and will affect the normal eruption of permanent teeth, and should be corrected in time. Misaligned bite will affect the appearance of children in the period of tooth replacement, tooth replacement, jawbone development, followed by the gradual establishment of the bite relationship, sometimes there will be a temporary misaligned bite, in the process of dental development, often can adjust themselves and return to normal. Some misaligned bites, such as excessive gaps between the upper front teeth due to the low position of the upper lip ligament, or individual teeth appearing backward, should be treated in the hospital as soon as possible, otherwise it will affect the child’s appearance. After the baby’s teeth gradually grow out, it is necessary to educate the baby to develop good habits of brushing correctly to protect the hard-won good teeth. In addition to proper brushing habits, your child’s eating habits are also important. Parents should control the intake of sweets and beverages for their children, as these foods can easily lead to tooth decay.