Cephalometric Comparison Of Transverse Craniofacial Structures In Adult High-angle And Low-angle Facial Types

A review of the literature searched by computer showed that no published roentgenographic cephalometric study had been made on adult high-angle and low-angle skeletal subjects using the PA roentgenogram.The purposes of this study were (1) to compare the differences of the transverse craniofacial morphology between the adult high-angle and low-angle facial skeletal types, and (2) to correlate the width measurements with data obtained from PA roentgenogram. Thirty-seven adults, 18 to 22 years old, with varied vertical facial types were separated into two groups: seventeen high-angle, twenty low-angle facial skeletal types. Thirty-eight measurements, including twenty-six linear, six angular, six ratio, were made by Winceph 7.0 Cephalograms/Model Analysis & Database. Descriptive statistics were used to characterize two groups, and intergroup differences were compared using One-Way ANOVA. Intercorrelations between measurements were analysed using linear correlation. There were no significant differences found in transverse measurements. The height of ramus in low-angle group was higher than high-angle group, on the contrary, the height of face and nose in high-angle group were higher than low-angle group. The ratio of transverse to vertical measurements revealed significant differences in two groups. The intercorrelations of width measurements were of a medium magnitude in low-angle group, meanwhile, the correlations between width and heights were of a medium magnitude in high-angle group. It was concluded that:...