Why do children lose their teeth late?

It is not normal for children to lose their teeth late, because this means that the growth rate of their teeth is abnormal. It is best to take them to the hospital for a detailed dental examination in time. Only in this way can their health be guaranteed. The timing of tooth replacement is also very important. If there are some mistakes, it will be bad for their future tooth development.

Normally, at the age of 6 to 7, the deciduous central incisor (central front tooth) of the mandible begins to shake and fall out, and soon the permanent central incisor grows in this place; at the same time, the first molar grows behind the second deciduous molar. After that, the other teeth were replaced one after another. The permanent monocuspids and bicuspids can only grow out after the deciduous teeth in the same position fall out. By the age of 12 to 13, all the deciduous teeth have fallen out and have been replaced by permanent teeth. After that, permanent teeth will grow separately: the second molar will grow behind the first molar at the age of 12 to 14, and the third molar will grow after the age of 18. It is normal for some people to not have third molars. [1]

The order and timing of tooth replacement are roughly as follows:

Number of teeth and time of tooth replacement

4 central incisors 6-7 years old

4 lateral incisors 8-9 years old

First pair of canines 4 at 10 years old

Single canine 4 11 years old

Second canines 4 12 years old

First molars 4 at age 6

4 second molars at 13 years old[1]

Retained deciduous teeth

Retained deciduous teeth When deciduous teeth do not fall out when they should, doctors call this phenomenon "retained deciduous teeth". Children should be taken to the hospital for examination and treatment in time.

Main reasons: ★ Misplacement of permanent tooth germ ★ Local inflammation ★ Loss of permanent tooth germ

Retained teeth that have erupted but have not fallen out should be extracted as soon as possible to avoid affecting the eruption of permanent teeth in the normal position. [1] If a person has exceeded the age of tooth replacement but their deciduous teeth have not fallen out and their permanent teeth have not erupted, they should not be removed easily. If the permanent teeth are congenitally missing, the deciduous teeth should be retained as much as possible.

Early loss of deciduous teeth

Premature loss of deciduous teeth The loss of deciduous teeth before they should fall out is called premature loss of deciduous teeth. This often causes the adjacent teeth on both sides to tilt toward the gap between the missing teeth, making the gap between the missing teeth smaller and causing the permanent teeth to erupt out of place due to insufficient space. A gap maintainer should be worn in the gap between deciduous teeth to prevent the teeth on both sides from tilting until the permanent teeth erupt. [1]

Difficulty with eruption of permanent teeth

Difficulty with eruption of permanent teeth

The permanent teeth generate eruption force during the development of the tooth roots, causing them to move toward the gums and gradually erupt. This requires a process, and is particularly obvious in the upper front teeth. If permanent teeth have not erupted after the replacement period, it is called delayed eruption of permanent teeth. The main reasons are: ★ Early loss of deciduous teeth ★ Supernumerary teeth ★ Obstruction of odontoma or cyst ★ Abnormal development of permanent teeth ★ Genetic factors