ASSESSMENT OF SKELETAL AND DENTAL CHANGES BY MAXILLARY PROTRACTION

To further evaluate the effect of maxillary protraction on facial grow th, cephalometric changes in 129 subjects with conditions diagnosed as skeletal Class III malocclusion and who had been treated with maxilla ry protraction were compared to 9 male and 12 female subjects with ann ual cephalometric records from the Yonsei growth study sample. The; co ntrol subjects had Angle Class I malocclusions with normal overjet and overbite. More maxillary forward displacement and mandibular growth i nhibition were observed in the protraction group during treatment, and the difference from the untreated controls was statistically signific ant. When changes due to treatment according to ages were compared, th ere was no statistical difference. The direction of maxillary growth w as similar in the untreated and protraction groups. Maxillary protract ion had a growth-stimulating effect on the maxilla during the treatmen t period.