Especially when primary teeth are replaced with permanent teeth, all primary teeth should be replaced. Especially when I was 6 years old, I began to change my teeth, and the order of changing my teeth was basically the same as eruption, starting from the middle and lower teeth. Although the retention time of deciduous teeth is short, its function is very powerful, which not only helps to eat and chew, guides the development of permanent teeth and jaws, but also affects people's beauty and pronunciation.
/kloc-About 0/2 years old, all deciduous teeth will be replaced by permanent teeth, and a few more permanent teeth will grow. Generally, there are 28-32 permanent teeth, which vary from person to person. Some people have four wisdom teeth, some people have 1-3 wisdom teeth, and some people have no wisdom teeth. Moreover, permanent teeth will never change, which mainly affects people's chewing, pronunciation and aesthetics.
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In addition, there may be a common problem of "six-age tooth", which is called "six-age tooth" because it is the first permanent molar that erupts in the mouth at the age of 6; Six-year-old teeth erupt at about the same time as they begin to change teeth, so many parents mistake six-year-old teeth for deciduous teeth.
Six-year-old teeth have unique surface morphology with deep pits and grooves. When they erupt, the degree of calcification is low and they are easy to decay. In order to prevent the pit and fissure caries of six-year-old teeth, the effective way is to close the pit and fissure, fill the pit and fissure of teeth, so that food residues and bacteria are not easy to accumulate, thus preventing the occurrence of pit and fissure caries, and at the same time, apply fluoride locally under the shiny surface to give children a healthy diet and oral hygiene habits.
People's Network-Children's dentists tell you that people's teeth are formed in this way.