Facial changes in children treated with the Activator appliance: a lateral cephalometric study.

Using lateral cephalometry, facial profile changes in 32 children treated with the Activator appliance were assessed and compared to profile changes in 12 untreated children of same age and with similar malocclusions. The results of this study indicated that the maxillary region of the facial profile underwent similar changes in both groups. In contrast, the mandibular changes were different, with the treated group showing more mandibular advancement than the untreated group during the period examined.