Korean J Orthod.  1978 Dec;8(1):27-37.

The variation of the cranio facio-skeletal complex according to change of the gonial angle

• Kim JC

Abstract

In order to know the variation of the associated craniofacial skeletal angle and linear distance according to the change of gonial angle, the roentgenographic cephalometric study was undertaken in Korean normal cephalometric analysis and electric computer. The following results were optained. 1) The size of gonial angle is mainly depend on the lower gonial angle. The mean of upper gonial gngle is almost same in normal occlusion group and malocclusion group. 2) It was resulted on normal group and malocclnsion group by F test that the number of parameters that were significant at 5% level of confidence were 14 parameters in normal occlusion group and 22 parameters in malocclusion group. 3) Ramus height and mandibular body length increased and facial ratio is decreased as gonial angle decreased. 4) MP-T, overbite depth and Y-axis angle is not related to gonial angle in normal occlusion group, but in molocclusion group, as gonial angle decreased, MP-T and overbite depth is increased and Y-axis angle is decreased. 5) SN-MP, OP-MP, PP-MP is increased as gonial anglel increased. it was mainly depend on the lower gonial angle.

MeSH Terms

Malocclusion
Overbite