Vertical changes in high mandibular plane cases following enucleation of second premolars.

The records of 23 patients who underwent mandibular second premolar enucleation in the early mixed dentition were studied. The patients were selected at random from a group which had mandibular plane angles in excess of 38 degrees to SN and had not worn headgear prior to mechanical orthodontic therapy. Pre- and posttreatment measurements were compared to measurements made in an earlier study by Isaacson et al. and a significant decrease in lower anterior face height was found.