when the lower jaw, which has the lower teeth, grows excessively or
When the upper jaw with the upper teeth is underdeveloped
Lower jawRefers to a condition in which they protrude forward.
Abnormal jaw growth, such as an underbite, is strongly influenced by genetics. However, it can also develop over time due to poor habits or posture, such as sleeping face down, resting your chin on your hand, or jutting your jaw forward.
In Class III malocclusion, the teeth do not bite together properly, which can make chewing and clear speech difficult, and it is often accompanied by TMJ pain and dysfunction. An underbite is also often associated with asymmetry and can greatly affect facial appearance, which may also affect emotional well-being. For these reasons, treatment is needed.