The rates of teething in children under one year and older: the order of appearance of the first teeth in infants with patterns and terms for the eruption of milk and permanent teeth according to Komarovsky

on 01.04.2017

Teething in babies does not always go smoothly and imperceptibly, sometimes at this time the baby experiences discomfort, pain, fever and even the appearance of an upset stomach. That is why it is important to understand in time - the child is sick or his teeth are cut so as not to treat the baby for non-existent problems.

The main thing in the article


When do baby's first teeth appear?

The lower central incisors erupt first in children.The norm is their appearance in the period from 6 months to 7-8 months. But, taking into account the peculiarities of the development of each child, not all of them have the first pair of teeth at this particular age interval.

Some children start to disturb the teeth already from the 3rd month of life, and completely cut through by 5 months. There are children whose incisors are cutting closer to the year, and this does not mean at all that the child is lagging behind in development - this speaks of his physiological features. The fact is that the first teeth of a child are laid in the womb, but when they erupt - an individual question.

smile baby boy with tooth 2

Factors affecting teething in a child

The teething may be influenced by the peculiarities of the course of pregnancy, since the baby’s teeth begin to develop already from the 8th week of pregnancy. The newborn already has 10 temporal and about 8 permanent tooth blanks (follicles) at different stages of development.

What can affect the teething rate shift?

  • Toxicosis during pregnancy.
  • Different Rh factor in the child and mother.
  • Premature birth (prematurity).
  • Peculiarities of childbirth - possibly injuries, cephalhematomas.
  • If the mother has a serious illness, for example, heart disease, or the pregnant woman has had toxoplasmosis.
  • Frequent colds in a child under the age of 1 year.
  • If the child was on artificial feeding from the first days of birth.
  • Pneumonia at an early age baby.

Interesting! According to statistics, boys have teeth that erupt later than girls; in children born to young parents, teeth erupt later than in children with older parents. It is also proven that the firstborn of a woman develops faster than the following children, and also in relation to teething.


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Scheme and order of appearance of milk teeth in the table

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Terms teething milk teeth: average

  • The lower incisors erupt first, depending on the physiological characteristics, this can happen from 5 to 8 months.
  • The upper central incisors begin their passage even in the process of cutting through the lower ones, but appear later. Despite the fact that the period of their appearance from 7 months to a year, they can begin to disturb much earlier.
  • The upper lateral incisors may appear as early as the 8th month of a child’s life, but more often they erupt later — about a year.
  • The lower lateral incisors follow the upper “brethren”, their appearance may be delayed until the age of 1 year and 3 months.
  • The first molars, both upper and lower, in most cases do not bother the child and the parents may not immediately notice their appearance. On average, they erupt up to 1.5 years, but in some cases it can take up to two years.
  • Fangs - climb all at once, not perfect at the same time, but almost with a difference of 5 to 8 days. Cut through an average of 1.5 years to 2-2.5 years.
  • The second molars are the most distant and last teeth of the baby. Their appearance can be expected from the age of 2 years and up to 3 years. Although there have been cases when the second molars appeared in a year and a half.

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When are baby teeth replaced by permanent?

Changing milk teeth to permanent ones in the normal course of the process is not as painful for the child and difficult for his parents as the appearance of milk teeth. As mentioned earlier, a child is born with at least 8 buds (follicles) of permanent teeth at different stages of their development. In the process of growing a child, permanent teeth are actively developing and growing. Here is how it looks at the skeletal level:

5Replacing the teeth in children occurs by pushing out the dairy with active permanent growth.

6The loss of milk teeth begins at 6 years old, but the resolution of their roots - at 5 years. That is, from the age of five, the central incisors (often the lower ones) may begin to wobble. The replacement process lasts up to about 12 years, depending on the characteristics of the child’s body. Usually in what order the teeth erupt during infancy, in the same and change (fall out).


The order and timing of the appearance of permanent teeth in the table

7In this picture you can see very well which teeth change to which ones. The main confusion usually occurs with the first and second milk molars, which change to permanent premolars. In turn, permanent molars do not change and erupt once, so it is very important to monitor the eruption and replacement of teeth in a child, so as not to miss the appearance of caries or any kind of disruption in this process.

What are considered as abnormal teething?

There are a number of deviations in the eruption of milk teeth, and in their replacement - with the eruption of constants.

  • Early teethingmilk teeth. If the first teeth, namely the lower incisors, erupted too early, for example, in 3-4 months, this does not necessarily mean pathology.Many doctors believe that in such a situation it is necessary to understand, whether it is a feature of the baby’s physiology, or it is related to the illness or some kind of disturbance in his body. At this age, they do nothing with their teeth, but they need to be examined. But in a situation where a child is born with teeth already cut through, they are pulled out by agreement of their mother. This is due to the fact that the baby can damage the nipple very much during feeding, as a result of which it will cause great damage to the health of the mother. The difficulty is that the removed milk teeth will no longer grow, and replacing them with permanent ones will only take 6 years!
  • Teething laternot always talking about the pathology and disorders, doctors admit the likelihood of individual development of the baby. But only in cases when this happens within acceptable limits. Of course, if the incisors are not cut to 1.5 years, this can be considered a pathology or a deviation.
  • Disturbed orderteething. Usually this happens rarely and is a consequence of what happens during pregnancy. The situation is considered individually - the entire history of pregnancy is studied in detail.

4Abnormalities during tooth replacement are easily calculated with the help of X-rays, and the method for eliminating deviations is already decided. What are they like?

  • Adentia talks about the absence of a tooth. This is quite rare and is detected as a result of an X-ray check. During the examination, it is determined whether there is a bud of the missing tooth and for what reasons it does not develop. The most common cause is the developmental disorder of the baby in the womb, which may be due to both internal and external factors.
  • Retention- when the tooth is present, but for some reason could not cut through in time. This may be the result of a lack of space in the dentition, which is most often associated with the displacement of adjacent teeth, possibly due to early destruction or removal of a particular tooth. It can also be prevented by the inflammatory process in the root system of the baby tooth or the incorrect initial position of the anlage.
  • Wrong directionpermanent molars during eruption - requires immediate medical intervention, as it threatens with inflammation and destruction of the adjacent tooth.
  • Eruption with hematomaMost often, it resolves quickly and there are no problems. But there are cases when the hematoma is rapidly developing and increasing, which must be eliminated immediately, since an internal fracture of the jaw is possible when a certain size is reached!

This list can be continued for a very long time, because how many people have so many teething features, some of which are deviations and require surgical intervention.

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Early and late teething of milk teeth in children: causes

To determine whether the deviation is early or late teething, there is a certain formula:

N (number of cut teeth) = n (age of the child in months) - 4.

If the error is 2-3 months, then parents should not worry, maybe it's just a physiological feature of development. When the difference is greater - it is a reason to consult a doctor and be examined.

Early dentition can be associated with diseases or disorders of the baby’s endocrine system, as well as with the peculiarities of pregnancy.

Later teething is most often observed in children with gastrointestinal problems, genetic disorders and rickets.But it is not necessary to panic prematurely - consult a doctor.

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Violation of the order of teething

Violations of the order of eruption were a rarity before and spoke of deviations, but nowadays, when the environment and the quality of products (which come actively from mother’s milk) greatly affect children, this is more common. And this does not always mean violations and deviations in the development of a child, but it is worth going through a doctor’s consultation.

Surprised baby being checked by doctor using stethoscope


Teething problems: what should parents do?

If the parents notice that the child’s teeth erupt incorrectly or at the wrong time, then you should go for a consultation to the orthodontist, who will direct you to take a picture and determine the cause of the problem.

Parents cannot do anything on their own - only on the recommendations of a specialized doctor!

It may be necessary for parents to undergo a complete examination of the child’s body, because anomalies in teething are sometimes associated with problems and disorders in other organs. In any case, it is better for the child to quickly determine the deviation and its cause, since it is easier to deal with problems at the stage of their appearance.

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The rates of teething in children under one year and older: the order of appearance of the first teeth in infants with patterns and terms for the eruption of milk and permanent teeth according to Komarovsky 61


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