Mandibular displacement and dentitional changes during orthodontic treatment and growth.

Mandibular displacement during orthodontic treatment and/or growth is usually analyzed through cephalometric superposition on the cranial base. Evaluation of mandibular movement in relation to the maxillary base has considerable value because the occlusion of the teeth is associated directly with the position of the maxillary and mandibular basal bones. The method of superimposition is outlined and applied to a number of treated malocclusions. Incorporation of this method in the study of treatment results is suggested.