The lower teeth biting in front of the upper teeth characterize an underbite. An underbite is usually caused by undergrowth of the upper jaw, overgrowth of the lower jaw, or a combination of the two (Class III Relationship). Underbite can also be caused by tipped back upper incisors, flared lower incisors, missing upper teeth or a combination of all the above. Early correction of underbite is recommended.

Underbite should be corrected because it can:

• Prevent proper functioning of the front and/or back teeth
• Be related of jaw joint dysfunction (TMJ)
• Make your smile less attractive