Figure IV.

Cluster centroids. Cluster 1 represented the mildest Class II skeletal profile of all groups with individuals presenting a slightly retrusive maxilla, mildly retropositioned mandible and normal vertical dimensions. Cluster 2 represented a moderate Class II malocclusion with a retrusive mandible, dental compensations with retrusive upper incisors and protusive lower incisors and a normal vertical dimension. Cluster 3 represents a more severe Class II skeletal profile in which patients present with both maxillary protrusion and mandibular retrusion and a decrease anterior facial height and deep overbite. Cluster 4 represents patients with a smaller mandible and decreased ramus height, a very steep mandibular plane and a tendency to an anterior open bite. Finally, Cluster 5 represents patients with a very flat mandibular plane angle, short anterior face height, protrusive upper incisors, large overjet and deep overbite.