A study of morphoiogy of mandibular symphysis and location of lower incisor under the influence of the craniofacial skeleton in skeletal Class III malocclusion / 대한치과교정학회지

ABSTRACT

The purpose of this study was to evaluate the morphology of mandibular symphysis and location of lower incisor under the influence of the craniofacial skeleton in skeletal Class III malocclusion. The sample consisted of 132 adults who, have severe Class III malocclusion(prognathism group, 33 males and 33 females), and who have normal occlusion(normal group, 33 males and 33 females). They had not received any orthodontic treatment or orthognathic surgery. The, lateral cephalograms were evaluated. The results were as follows: 1. Prognathism group were larger than normal group in comparison of facial skeleton (p0.05). 4. The probability by regression test between vertical measurements(angle SN-Mn, angle FMA, angle Pal-Mn, angle LFH) and symphysis measurements(LiACBW, LiABBW, SW, angle LISA) were very high (p<0.001).