Dental problems In the second year of junior high school, only 4 baby teeth were replaced, 80

You have a baby tooth or a new permanent tooth disease, a baby tooth retention.

Generally, the eruption of permanent teeth begins with the eruption of the first permanent molars at the age of 6, the first permanent molars, also known as the "sixth instar teeth", are the teeth that bear the most chewing pressure, and are used for the longest time in a person's life, and its position affects the normal eruption of other permanent teeth. After that, a pair of teeth erupts about every other year until 28 permanent teeth erupt around the age of 12, while the third permanent molars usually erupt around the age of 20. The location of the sixth instar tooth:

Parents are asked to open their mouths and look in the mirror, and count the sixth tooth (the big one) from the middle and upper and lower middle incisors (that is, the front teeth), and then the seventh large tooth is the second permanent molar (similar in shape to the sixth instar tooth), and the last one is called the wisdom tooth (third permanent molar), but this tooth is not long or inconspicuous in some people. Therefore, the first permanent molars are also known as the "key to the union" and should be given full attention and protection. After that, a pair of teeth erupts about every other year until 28 permanent teeth erupt around the age of 12, while the third permanent molars usually erupt around the age of 20.

The third permanent molar, commonly known as "wisdom teeth", is a gradually degenerating organ of human beings, with many clinical variations, and various types of impacted growth often occur when it erupts, resulting in pericoronitis of wisdom teeth.

The eruption of a normal tooth has a relatively constant regularity. According to a lot of data, there is a certain time and order for the eruption of each tooth, the eruption of women is slightly earlier than that of men, the eruption of mandibular teeth is earlier than that of maxillary teeth, and the age of the eruption of the teeth of the same name on the left and right sides is about the same, etc., the eruption of teeth is related to the early development of teeth, and those who develop early also erupt early; Late eruption.

There is a big difference in the age of tooth eruption from person to person, and it is still normal for children to start erupting baby teeth at about 1 year old. There are also no uncomfortable symptoms of tooth eruption. If the tooth erupts early (within 6 months from the tooth replacement) or late eruption (more than 6 months from the tooth replacement), the baby tooth or new permanent tooth disease, the baby tooth retention, etc., do not blindly rush or deal with it at will, you should find a dental specialist to examine the cause in detail, see whether there is a local or systemic disease, whether there is congenital permanent tooth loss, and give corresponding ** and guidance.

From baby teeth to permanent teeth.

When do children change their permanent teeth?

As children grow older, their jaws gradually develop and grow. When the baby teeth reach a certain point, they complete their masticatory function and begin to fall out one after another, and they are replaced by permanent teeth.

There is a certain pattern of baby teeth falling out and permanent teeth erupting. Normally, at the age of 6 to 7 years, the deciduous central incisors (middle incisors) of the lower jaw begin to shake and fall out, and soon the permanent central incisors erupt here; At the same time, the first molar erupts behind the second deciduous molar. Since then, other teeth have been replaced.

The single and double cuspids of permanent teeth can only erupt after the baby teeth in the same position fall out. Until the age of 12 or 13, all the baby teeth are lost and the permanent teeth are replaced. Later, a single permanent tooth:

12 At the age of 14, the second molars develop behind the first molars, and after the age of 18, the third molars develop. It is normal for some people not to have a third molar.

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

Central incisors 4 6-7 years old.

Lateral incisors 4 8-9 years old.

First pair of cuspids 4 10 years old.

4 single cuspids 11 years old.

Second pair of cuspids 4 12 years old.

First molars 4 6 years old.

Second molars 4 13 years old.

When changing teeth, the root of the primary tooth is gradually absorbed due to the movement of the permanent tooth germ in the direction of eruption, compressing the root of the deciduous tooth. Therefore, the deciduous teeth that have fallen out have no roots.

How does the transition from baby teeth to permanent teeth? What is the importance of 6th instar teeth?

Your child will have a pair of healthy and perfect teeth to chew food well, speak well, and white and neat teeth will make your baby's little face more adorable. In a person's life, there are 2 sets of teeth, which are divided into baby teeth and permanent teeth according to the time of eruption. Baby teeth, commonly known as milk teeth, begin to erupt from 6 to 8 months after birth, and emerge around the age of 2 and a half, with a total of 20, 5 on the upper and lower jaws, and 5 on the left and right sides.

Around the age of 6, the first permanent molar, called the sixth instar tooth, erupts behind the last deciduous tooth. After that, the baby teeth in the oral cavity gradually fell out, and the permanent teeth erupted one after another, around the age of 13, the permanent teeth all replaced the baby teeth, a total of 28, 7 in the upper and lower jaws, left and right sides, and around the age of 20, the last molar erupted, and the permanent teeth could reach 32.

The sixth instar tooth, the earliest permanent tooth that erupts in childhood, is very important for the child's teeth alignment and maxillofacial development, and special attention should be paid to protection. If caries is found, it should be applied or filled as soon as possible, and it should not be used as a baby tooth extraction. Premature loss of teeth in the sixth instar will cause the dislocation and growth of adjacent teeth, and the occlusal deformity of the entire upper and lower jaw teeth, affecting the normal development of the face.

It is recommended to go to a regular dental hospital to take a panoramic film to see the situation of the permanent tooth germ, if the congenital lack of permanent tooth germ, then it should be repaired**, if there is a permanent tooth germ, it may be because the gums are denser, the bone density is relatively high, and the eruption of permanent teeth is not easy to establish, resulting in delayed tooth eruption.

Me too, my mom is a doctor, and she said my original teeth were too strong and no problem.

Condition analysis: You can go to the dental department of the hospital to take a dental film to determine whether there is a permanent tooth germ, and if so, you can wait patiently for a while. For example, some children have premature tooth loss, the gums in the missing tooth area have been rubbed with food for a long time, resulting in gum proliferation and thickening, and the resistance of permanent teeth is too great when erupting, so it is necessary to help germination.

You can simply check it yourself at home, if your child's gums are slightly whitish and you can roughly see the shape of the incision of the tooth, this is the time to help germination. If you don't have permanent tooth germs, you won't have teeth, you should ask your dentist to have a gap maintainer to keep the missing teeth in the gap, and wait until you are 18 years old to have your dentures restored.

Suggestions: Generally, the reasons for children's sleep and teeth grinding at night are mental stress, intestinal worms, calcium deficiency, etc. If the child has not been repelled with intestinal worms, intestinal worms can be repellent, and the child can only be given oral levamisole if the child has been repelled with intestinal worms, and if the child has been repelled with intestinal worms, the child can be given calcium supplements containing vitamin D orally.