How old can a child change his teeth?

People have to grow teeth twice in their life, that is, primary teeth and permanent teeth. There are 20 deciduous teeth, which usually erupt around 6 months, and grow together at the age of 2-3, and 28-32 permanent teeth (the number of wisdom teeth is 0-4). Generally, they grow together at the age of 6, and the age is 12- 13 (wisdom teeth vary from person to person), so the tooth replacement period is generally 6.

1. When will the baby change his teeth?

Under normal circumstances, children begin to change their teeth from about 6 years old, and the deciduous teeth begin to fall off physiologically, and the permanent teeth that replace the deciduous teeth erupt one after another. By the age of 12- 13, all primary teeth were replaced by permanent teeth. There are certain rules for changing teeth. Simply put, it is "a certain time, a certain order, left and right symmetry, first down and then up", and left and right symmetry is relative to teeth with the same name.

The order of children's tooth replacement is as follows: children are about 6 years old, and the first permanent molar grows right behind the last deciduous molar, also called the sixth molar; Earlier or at the same time as the lower central incisor, the lower central incisor fell off at the age of 6, the upper central incisor fell off at the age of 7-8 and the lower central incisor fell off at the age of 7-8. 8-9-year-old deciduous upper incisors fall off and grow permanent upper incisors; At the age of 9- 12, the first and second deciduous molars fell off, and the first and second pairs of canines grew. 10 ~ 12 years old, deciduous teeth fall off and permanent teeth grow out.

2. Seven Points for Attention in Children's Tooth Changing Period

For children aged five or six, changing teeth may be more important than letting them play the piano, roller skating and learn arithmetic. Because new permanent teeth will accompany them for almost a lifetime, which is related to diet, appearance and even psychology. Health care during tooth changing is very important, which is directly related to whether the children's teeth are neat and beautiful in the future. Therefore, parents should pay more attention to their children's oral care during this period, so that their children can have good teeth.

Note 1: Whether the deciduous teeth are stuck or fall off early.

There is a certain time and order for deciduous teeth to fall off. The symptom of falling off without falling off is called retention of deciduous teeth, and the consequence is often that permanent teeth cannot erupt in normal positions. Most children start to change their teeth at the age of five or six, and some children start at the age of four. Some children will lose their first deciduous teeth at the age of seven. Tooth loss usually begins with the next two incisors, and then the last two incisors. The common phenomenon is that the lower front permanent teeth grow on the inner side of deciduous teeth, and the upper front permanent teeth grow on the outer side of deciduous teeth, which looks like double-layer teeth. In this case, parents should take their children to the hospital as soon as possible to remove the stranded deciduous teeth and make room for the eruption of permanent teeth.

If the deciduous teeth fall off before they should, it is called premature deciduous teeth fall off, which often leads to the adjacent teeth on both sides leaning towards the gap of missing teeth, which makes the gap of missing teeth smaller, and the permanent teeth sprout out of position due to insufficient gap. At this time, it is necessary to wear a gap bracket at the gap of the deciduous teeth to prevent the teeth on both sides from tilting, so as to keep the eruption position of the permanent teeth until the permanent teeth erupt.

Note 2: Is it difficult for permanent teeth to erupt?

Early deciduous teeth fall off, and children are used to chewing and licking with gums, which will thicken and hinder the eruption of permanent teeth. Therefore, if the child has reached the age of changing teeth and the permanent teeth have not yet grown out, it is necessary to take the child to the hospital for examination in time and get the help of the doctor. Calcium deficiency in children is also an important reason for delayed eruption of permanent teeth. Parents should give their children calcium supplements in time.

When changing teeth, the front permanent teeth erupt from below or inside the deciduous teeth, and the erupted permanent teeth are the size of adult teeth. It is normal to have slight crowding and torsion, which can be adjusted by itself with the eruption of adjacent teeth and the growth and development of jaw. As long as it is not malocclusion, it is generally not necessary to correct it, but it should be observed regularly for no more than half a year. If the arrangement of deciduous teeth is still uneven after complete replacement, you should see a doctor in time to avoid delay in treatment and cause correction difficulties.