Why Some People Don’t Have Wisdom Teeth?


The human jaw is finally formed at the age of 22-27 years old. By this time a person should have 32 molars, 16 at the top and 16 at bottom. Third molars or “the eights” often erupt much later than other teeth, at the age of 17-18 years old. Because of this, they got their well-known name – wisdom teeth.

All molars have the same structure and almost the same number of roots. Wisdom teeth are no exception.

The wisdom tooth consists of the following elements:

  • rwisdom teeth don't grow at alloots and root canals;
  • pulp chamber;
  • dentin layer;
  • enamel.

The only thing that distinguishes the wisdom tooth from the standard molars is the period of its eruption. It begins to form at the age of 6-7 years old. Gradually, the wisdom tooth increases in size (mainly the crown part and the pulp chamber). By 15-17 years roots begin to form, resulting in direct growth.

92% of the world’s population has 4 third molars, 2 teeth on the upper and 2 on lower jaw. Some people (about 0.1%) have 6 or more “eights”, sometimes wisdom teeth don’t grow at all (about 8%).

There are only two explanations why wisdom teeth don’t grow in adults. The first option is adentia of third molars. In this case, the “eight” is simply not formed in childhood.

The second reason why the wisdom teeth didn’t grow is absolute or partial impaction. In this situation, the “eight” is finally formed, but could not grow. This is due to its improper location in the jaw or lack of space in the dentition. This scenario is considered dangerous, because impacted third molars lead to the destruction of neighboring roots, severe inflammation, the appearance of tumors in the gums, neurological diseases and other pathologies.

Unpleasant sensations during the eruption of the wisdom tooth can be classified as light and dangerous. If the wisdom tooth hurts, the reasons are as follows:

  • wisdom teeth don't grow causesslight inflammation of the gums due to violation of its integrity;
  • pressure on adjacent teeth;
  • acute purulent pericoronitis.

The described symptoms always accompany the eruption of the third molar due to the rupture of the gum tissues. When the tooth is growing, the gum swells and turns red, you may see minor bleeding. If the inflammation is weak and there is no pus, it is easy to cope with the problem at home:

  1. Limit the load on the growing tooth. Try not to chew solid food on the side where it erupts.
  2. In the morning, in the middle of the day and in the evening rinse the mouth with a solution of Chlorhexidine for 1 minute.
  3. Immediately after the antiseptic treatment lubricate the gums with Holisal gel.
  4. In case of severe pain, take a non-steroidal analgesic-Nimesil, Ketanov or any similar drug.

Sometimes these recommendations do not help to get rid of unpleasant symptoms. In such situations, the pain can be caused not only by a slight inflammation of the gums, but also by the pressure of the “eight” on the adjacent teeth. In this case you should immediately contact a specialist. The wrong arrangement of the crown of the third molar leads to the destruction of adjacent roots.

When the growth of the wisdom tooth is very long and painful, pericoronaritis often begins. This is an acute inflammation of the mucous membrane, accompanied by the release of a large amount of pus. A sick wisdom tooth, especially in the presence of caries, can provoke severe consequences, up to sepsis. Pericoronaritis can be cured only by the dentist. Do not try to cope with it yourself.

Doctors’ opinions on the issue were divided. The decision on whether to remove the wisdom tooth in a particular situation is made only by a qualified doctor with the consent of the patient, based on the following indicators:

  • wisdom tooth does not growlocation of the tooth;
  • the effect of the problem tooth on the entire jaw row;
  • integrity and general condition of the crown and roots;
  • the need to preserve the third molar for prosthetics.

Modern doctors practicing in developed countries of Europe and the United States, suggest that there is no need to treat wisdom teeth. Progressive dentists think that they should be immediately pulled out after their eruption, often under general anesthesia. It is believed that the “eight” has more potential threats than the intended benefits.

Sometimes the “eights” appear at the age of 40, when a person does not expect their eruption. The growth of these teeth is often unpredictable without an x-ray examination.

All in all, you should not worry if wisdom teeth didn’t grow. This is quite normal. Moreover, this means that you are a lucky person who will not face many problems and complications associated with the eruption of third molars. It is worth saying that wisdom teeth do not have any important functions, so their absence will not bother you.

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