The first is the common jaw deformity, which means that the position of the chin is behind the second vertical line, but the occlusion of the teeth is normal, so as long as the face is matched, the chin can be padded to correct this defect.

The second kind of mandibular cushion deformity is a more serious deformity. This kind of people have mandibular hypoplasia, complicated with dentition recession, often accompanied by other congenital defects, which need the cooperation of plastic surgery, oral surgery and orthodontists. This kind of patient is quite rare.