Cleft Maxillary Hypoplasia is an undergrowth of the maxilla, or upper jaw, that occasionally occurs in children with cleft lip and palate. It is more common when the cleft is bilateral. As the child's face grows, the upper jaw is unable to keep up with normal growth of the lower jaw, and the upper teeth become abnormally positioned behind the lower jaw teeth.
With surgery, the upper jaw can be predictably brought forward, not only normalizing the relationship of the jaws, but also normalizing the relationships of the lips to each other and to the nose.
Surgery to correct cleft maxillary hypoplasia is normally performed in the teen years after jaw growth is completed.