Time of eruption
For most people, the eruption process takes place during their late teens or early twenties (18-20 YEARS OF AGE) although eruption outside of this age range is not uncommon.
If there is not enough room for the teeth, or they are not aligned properly, they may never fully erupt.
People usually have four : upper left, upper right, lower left, and lower right.
If they don't, it's due to their genetic makeup. It's been estimated that about 25% of people are lacking one or more.
What are Impacted wisdom teeth??
In dental terminology, an "impacted" tooth refers to one that has failed to fully emerge into its expected position.
This failure to erupt properly might occur because there is not enough room in the person's jaw to accommodate the tooth, the tooth's eruption path is obstructed by other teeth or because the angulation of the tooth is improper.
Types of impactions:
Dentists use a number of terms, in combination, to describe the positioning of impacted teeth. They are mesial, distal, horizontal, vertical, soft-tissue and bony.
Mesial,vertical,horizontal,distal
These terms are used to refer to the general angulation (positioning) of the tooth.
Vertical impactions have a relatively normal orientation.
Horizontal (also traverse) impactions have an alignment where the tooth is lying on its side.
- A Distal (also disto-angular) impaction has an angulation that is generally directed towards the rear of the mouth.These are most difficult to remove.
What causes Disimpaction??
The reason why some wisdom teeth are impacted is not an easy question to answer. A primary cause simply seems to be a condition of inadequate jawbone space behind a person's second molar.
Why this lack of space exists is not fully understood. There does, however, seem to be a correlation between large tooth size and/or the presence of generalized tooth crowding and having impacted wisdom teeth.
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