What causes an underbite?

There are various factors that can contribute to the development of an underbite:

Genetics: Certain individuals may have a genetic predisposition towards an underbite, inherited from their parents or ancestors.

Jaw Alignment: Jaw misalignment, also known as malocclusion, can result in an underbite. This may occur when the lower jaw (mandible) is positioned forward compared to the upper jaw (maxilla).

Overbites in Early Childhood: Initially, most children have a small overbite. As their teeth and jaws grow, the overbite gradually reduces to a normal bite. In some cases, an overbite persists or becomes even more pronounced, which can eventually develop into an underbite.

Prolonged Thumb Sucking: Persistent thumb sucking beyond the age of 3 or 4 years can exert pressure on the teeth and jaws, leading to the protrusion of the lower jaw and the development of an underbite.

Tongue Thrusting: A habit of thrusting the tongue forward while speaking or swallowing can place constant pressure on the teeth, causing the upper jaw to narrow and the lower jaw to be pushed forward, resulting in an underbite.

Trauma: In some cases, facial injuries or trauma may affect the growth and development of the jaws, leading to an underbite.

It's essential to consult a dentist or orthodontist if you notice signs of an underbite or other dental concerns. They can assess the underlying factors and recommend appropriate treatments to correct the condition. Early intervention can help guide jaw development and prevent further complications.