A longitudinal cephalometric study of the craniofacial growth changes of Korean aged from 16.5 to 18.5 years

Sung, Jae Hyun

Abstract

Postpubertal craniofacial growth changes were assessed from serial lateral cephalograms taken at which subjects were 16 and 18 years of age. The sample consisted of 19 male and 14 female subjects with no previous orthodontic treatment who had normal occlusion. The craniofacial growth changes of these samples during this study period might be summarized as follows. 1. Significant increase in mean maxillary and mandibular length, cranial base length, posterior and anterior facial height were observed at the age period studied in male(P<0.05), however, in female significant increase was observed only mandibular length(Ar-Gn, Ar-Go) and anterior and posterior facial height(P<0.05). 2. Total growth increment of all measurenats were below 1mm in female, but in male, total mandibular(Ar-Gn) growth increment was 2.0mm and those of mandibular tody length, ram length, posterior facial height, and anterior facial height were 1 to 1.54mm and the others were below 1mm. 3. A closing, forward rotation of the mandible occurred with a significant decrease in mandibular plane angle of 0.61degrees in male(P<0.01). 4. Summarized the findings, even though statistically significant growth changes in some dimensions of female were observed, the amount of growth change were very small, however, in male the growth changes of some dimensions associated with mandible were significant and considerable amount.