Maxillary movement in distraction osteogenesis using internal devices in cleft palate patients.

Objective: The purpose of this cephalometric study was to compare the actual movement with the planned movement of the maxilla by using internal maxillary distraction in cleft lip and palate patients.

Patients: Twelve patients, including eight with unilateral and four with bilateral cleft lip and palate, underwent maxillary advancement with internal maxillary distractors.

Main Outcome Measures: Lateral cephalometric radiographs obtained preoperatively, predistraction, and postdistraction were used for analysis.

Premolar and additional first molar extraction effects on soft tissue. Effects on high Angle Class II division 1 patients.

Objective: To determine the effects of premolar and additional first molar extractions (AFMEs) on soft tissue changes after four premolar extractions in high Angle Class II division 1 patients.

Materials And Methods: Thirty-three AFME patients, 24 of who had maxillary-only AFME and 9 of who had all-four AFME, were studied by cephalometric analysis and compared with 43 patients treated with four premolar-only extractions (PRMEs) as a control group. Lateral cephalograms taken at four time points-pretreatment, before AFME, posttreatment, and retention-were utilized for statistical analysis by Student's t-test.