Vertical changes in Class III patients after maxillary protraction with expansion in the primary and mixed dentitions.

Abstract

Class III corrections should be started as early as possible, once the diagnosis is made and cooperation allows it. Most of the changes were seen between the ages of 3 to 6 years. No significance was seen after the age of 9 years with the exception of ANS-Me in both males and females (P < 0.05). No differences were seen between males and females in all measurements at the different ages with the exception of occlusal plane to SN (P < 0.05) between 3 to 6 years. The vertical changes were mostly seen in the mandible with no direct benefit from the changes in the midfacial region.