Conditions and Classifications

There are several types of malocclusions (teeth/jaws meeting in an unhealthy way). Orthodontists usually diagnose one out of 3 classes of malocclusion.



Class I

In a Class I malocclusion a patient’s jaws line up correctly, however the teeth are crooked, crowded, turned or spaced too far apart. This problem can occur when the  teeth are either too larger or too small for the jam, making it hard to chew properly.



Class II

A Class II patient’s upper jaw is protruding too far or the lower jaw is too far back. This is commonly called an “overbite”.




Class III

In a Class III case the lower jaw is protruding too far or the upper jar is too far back. This is commonly called an “underbite”.



Besides these 3 classes of malocclusion there are other orthodontic problems that lead to an unhealthy bite.



Open Bite:

An open bite occurs when a few poorly placed teeth prevent the front teeth from meeting while the mouth is closed.


Closed Bite:

A closed bite is a condition where the upper teeth overlap the lower teeth too much and the lower incisors touch the roof of the mouth.



Cross bite:

When some of the upper teeth close inside of the lower teeth while the mouth is closed, the condition is classified as a cross bite.