Classification Of Teeth | Kirkland WA

The classification of bites is broken up into three main categories: Class I, II, and III. This classification refers to the position of the first molars and how they bite together.

Class I: Class I is a normal relationship between the upper and lower teeth and jaws or balanced bite.

Class I Normal
Normal

Class I Crowding
Crowding

Class I Spacing
Spacing

Class II: Class II is where the lower first molar is posterior (or more towards the back of the mouth) than the upper first molar. In this abnormal relationship, the upper front teeth and jaw project further forward than the lower teeth and jaw. There is a convex appearance in profile with a receding chin and lower lip. Class II problems can be due to insufficient growth of the lower jaw, an over growth of the upper jaw, or a combination of the two. In many cases, Class II problems are genetically inherited, and can be aggravated by environmental factors such as digit sucking. Class II problems are treated via growth redirection to bring the upper and lower teeth and jaws into harmony.

Class II Division I
Division 1

Class II Division II
Division 2

Class III: Class III is where the lower first molar is anterior (or more towards the front of the mouth) than the upper first molar. In this abnormal relationship, the lower teeth and jaw project further forward than the upper teeth and jaw. There is a concave appearance in profile with a prominent chin. Class III problems are usually due to an overgrowth in the lower jaw, an undergrowth of the upper jaw, or a combination of the two. Like Class II problems, they can be genetically inherited.

Class III Skeleton
Skeleton

Class III Dental
Dental

Call us at Kirkland Office Phone Number 425-821-8411 if you have any questions or to schedule an appointment with Dr. Kang today!