It is common for the upper incisors to protrude. When a child swallows, the lips normally come together to form a seal,
but this seal is hard to achieve if the upper teeth protrude excessively. The chin muscle then puckers in order to push the
lower lip up far enough to meet the upper lip, and the resulting facial expression is somewhat unattractive.
The puckering of the chin muscle in order to extend the lower lip up to form a lip seal causes the lower lip muscle
to increase in size. This increase in bulk of the lower lip will cause crowding of the lower incisors. It can be avoided
by referral to an orthodontist experienced in treatment of young children. Treatment may include expansion of the jaws
to reduce the incisor protrusion. Or treatment may consist of correcting the incisor protrusion by advancing the lower jaw.
Sometimes removal of 2 or 4 teeth is desirable. The faces created are better than if untreated and the stability of the
results is remarkable once correct jaw posture and tongue posture have been created.
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