A Class 2 bite, also known as a distocclusion, is a malocclusion (misalignment of teeth) where the lower first molar is positioned posterior (further back) than the upper first molar. Essentially, the upper teeth and jaw significantly project forward relative to the lower teeth and jaw.
This condition is characterized by:
- Molar Relationship: The lower first molar is positioned further back than the upper first molar. This is the key diagnostic indicator.
- Overjet: Frequently, individuals with a Class 2 bite exhibit an increased overjet, meaning the upper front teeth protrude significantly beyond the lower front teeth.
- Profile Appearance: A Class 2 bite often results in a convex facial profile, characterized by a receding chin and lower lip.
There are two subdivisions of Class 2 malocclusion:
- Class 2 Division 1: The upper incisors are protruded (stick out). There's a large overjet.
- Class 2 Division 2: The upper central incisors are retruded (tilted back towards the palate), while the upper lateral incisors may be protruded. There is often a deep overbite (the upper front teeth excessively overlap the lower front teeth).
In simpler terms: Imagine closing your mouth. If your lower teeth are noticeably set back compared to your upper teeth, and you have a receding chin appearance, you likely have a Class 2 bite.
