Wisdom teeth usually appear between the ages of 17 and 21. Wisdom teeth commonly affect other teeth as they develop, becoming impacted or “coming in sideways”. They are often extracted when this occurs.
Impacted wisdom teeth fall into one of several categories:
- Mesioangular impaction is the most common form (44%), and means the tooth is angled forward, towards the front of the mouth.
- Vertical impaction (38%) occurs when the formed tooth does not erupt fully through the gum line.
- Distoangular impaction (6%) means the tooth is angled backward, towards the rear of the mouth.
- Horizontal impaction (3%) is the least common form, which occurs when the tooth is angled fully ninety degrees sideways, growing into the roots of the second molar.