Mouth

Positional Deformity of the Jaw

In this newborn, the gums are not parallel with each other. This is due to in utero molding, when the head has been turned to one side (to the right in this baby) and the chin has been pushed up against the shoulder for some time. The angle is usually mild, but in some cases, it can be pronounced enough that the jaw subluxes with opening. Spontaneous resolution is expected.


photo by Janelle Aby, MD

Positional Deformity of the Jaw

A closer view of the same infant, the angle between the upper and lower jaws can be better appreciated with the gums closer together.


photo by Janelle Aby, MD

Positional Deformity of the Jaw

With a wider view, the asymmetry of the chin can be seen. The right side of the chin is more concave and fits nicely up against the right shoulder -- the position in utero. In contrast, the left side of the chin appears more full.


photo by Janelle Aby, MD