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Submentovertex cephalometric analysis of Class II subdivision malocclusions.

Submentovertex cephalometric analysis was used to assess the mandibular symmetry of 20 patients with Class II subdivision malocclusion and 20 controls with Class I occlusions. Using the intercondylar line and the intercondylar axis, the relative differences were measured between mandibular landmarks in both anteroposterior and transverse dimensions. Anteroposterior and transverse differences between left and right mandibular positions and the transverse position of the dental midline showed a statistically significant difference between the groups. The position of the coronoid process also differed between the two groups. We conclude that the entire mandibular dentition is rotated in Class II subdivision malocclusions.