Common Jaw Growth Problems
The relationship of the upper and lower jaw is divided into three main categories called Class I, Class II, and Class III.
CLASS I![]() The upper and lower jaw line up properly. This is an ideal relationship. |
CLASS II![]() The upper jaw is too far forward or the lower jaw is too far back. |
CLASS III![]() The upper jaw is too far back or the lower jaw is too far forward. |