What type of malocclusion describes an under bite?

An underbite is characterized by the lower teeth protruding further than the upper teeth when the mouth is closed, which is known as a Class III malocclusion. In this type of occlusion, the relationship between the upper and lower jaws is such that the lower jaw is positioned more forward than the upper jaw. This results in a typical underbite appearance.

Understanding the classifications of malocclusion helps dental professionals assess bite relationships and plan treatment accordingly. Class I malocclusion is generally considered a normal bite where the teeth align properly, while Class II involves an overbite where the upper teeth overlap the lower teeth significantly. Class IV is not a standard classification used in dental terminology regarding malocclusion. Therefore, recognizing that Class III is specifically associated with an underbite is important for both diagnosis and treatment planning in orthodontics.