Most teeth are erupted in a person in childhood. But from this rule there is an exception - the wisdom teeth. They appear later than all the others. It is believed that this is why they were given this name.
So what is the difference between "wise" teeth and all the others? At what age do they appear? Up to how many grow? And can not they break through at all?
Contents of
- What you need to know about the "eight"
- How many should there be?
- Features of the location and eruption
- Features of the anatomical structure
- How many years do wisdom teeth start to grow?
- When do the last molars grow?
- How long does the tooth come in?
- They may not be?
What you need to know about the "eight"
What you need to know about the wisdom teeth.
How many should there be?
The normal number of wisdom teeth or "eights" in a person is 4. This is the extreme molars on the lower and upper jaw, erupting much later than all other teeth.
But it's impossible to speak about their number unambiguously, because over time the human jawbone has undergone evolution and decreased in size. A consequence of this was a reduction in the number of teeth located on it.
Therefore, someone grows all 4 "Eight", someone has two, and some of these chewing elements may not appear at all.
Most often, wisdom teeth erupt in pairs. But there are cases when a person has only one or three last in the molar series.
Features of the location and eruption
Wisdom teeth are the most extreme teeth on both sides of the lower and upper jaw. Like other pairs of teeth, they are located symmetrically relative to each other and are the eighth in terms of, starting from the middle cutter. Hence their dental name - the G8.
Unfortunately, the peculiarity of these teeth is that they rarely occupy the right position on the jawbone. Often these molars develop and erupt with some anomalies. This can be expressed in their wrong location or direction of growth, which brings a lot of trouble to a person.
Since there were no milk teeth on this site, the G8 has to independently make its way to the gum surface. In this case, a person long before the eruption can begin to feel pain in this place. Often the appearance of a wisdom tooth is accompanied by inflammation and swelling of the eruption area.
Features of anatomical structure
Externally, wisdom teeth look exactly like other multi-rooted teeth. But in their structure the G8 has a number of differences. In particular, this concerns their part, hidden in the gum. Usually, these teeth have four, rarely five roots.
Sometimes it happens that extreme molars have only one or two roots. But this is only an appearance, in fact it is a few roots, merged into one. Often the root canals of wisdom teeth have bends, which makes their treatment or removal very difficult.
The eruption of eighth molars is shrouded in a multitude of myths and prejudices. In this regard, patients have many questions related to their growth, which we will try to answer.
How old do wisdom teeth start to grow?
The rudiments of wisdom teeth begin to develop after the baby has had a replacement of milk teeth, and all 28 permanent teeth have grown. Usually this is the period from 13 to 15 years old .
But they start to appear after 17-18 years, in some cases it happens only to 30 years. Up to this time, they grow inside the jaw. Formation of the roots occurs even later, when the "eight" has already appeared on the surface of the gum.
When do the last molars grow?
Most often the eighth teeth begin to erupt in the period from 18 to 25 years .
But with time these terms become more and more conditional. At the present time, it is not uncommon for wisdom teeth to appear in the 30-35 years, and sometimes even only in old age.
How long does the tooth come in?
The exact time of growth for the wisdom teeth can not be named. For each person, it is purely individual."Eights" can erupt for several months or ten years, all this time causing pain and other inconveniences.
The growth of extreme molars is replaced from time to time by periods of activity and rest, they then freeze, then they again start moving to the surface of the gum. This process can last for many years.
They may not be?
The beginnings of the "eights" are available to all people. But this does not mean that they will break through to the gum surface and on the dentition there will be a complete set of 32 permanent teeth.
The structure of the jaw of a modern man makes it increasingly difficult to erupt wisdom teeth. Sometimes they simply do not have enough space on the jawbone, and they remain in the embryo stage.
But there is also such a phenomenon as retinirovanny wisdom tooth. It is a full-fledged molar, but it is completely or partially hidden in the jaw bone or in the gum.
Such teeth, despite the fact that they did not erupt, usually have completely normal dimensions. In addition, they can get sick just like the rest.
The growth of wisdom teeth is very individual. There is a difference in the time of the eruption of the "eights", and their location on the jaws of man.