What Causes an Underbite in Adults?
Introduction
An underbite is a dental condition where the lower teeth extend in front of the upper teeth when the mouth is closed. While some underbites begin during childhood, many adults first become concerned about the condition later in life when it begins affecting appearance, comfort, or chewing function.
Understanding what causes an underbite is an important step in determining the most appropriate treatment approach.
Genetics and Jaw Development
One of the most common causes of an underbite is genetics. In some individuals, the lower jaw develops more prominently than the upper jaw.
This skeletal difference can cause the lower teeth to sit in front of the upper teeth.
Skeletal underbites are often the type most associated with orthognathic jaw surgery.
Dental Causes
Not all underbites are skeletal. Some are caused primarily by the position of the teeth rather than the position of the jaw bones.
Dental causes may include:
- improper eruption of teeth
- missing teeth
- abnormal tooth wear
- bite collapse over time
When the teeth rather than the jaw are responsible for the bite relationship, treatment options may differ significantly.
Changes Over Time
Some adults develop worsening bite problems later in life due to:
- tooth wear
- shifting teeth
- previous dental work
- loss of back teeth
These changes can alter the way the upper and lower teeth meet.
Treatment Options
Treatment depends on the cause and severity of the underbite.
Options may include:
- orthodontics
- jaw surgery
- restorative dentistry
In certain cases, restorative dentistry may allow improvement of an underbite without jaw surgery.
Learn more about non-surgical underbite correction and the Kurpis Method™.