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This research examined the frequency and type of facial asymmetry of 50 patients with mandibular deformity who visited the Department of Orthodontics of the hospital attached to Meikai University.<BR>The method involved angle and distance measurements made from a standardized frontal facial photograph.<BR>The mandibular deformity patients were divided into symmetrical and asymmetrical facial groups; and the latter were further classified into lower, middle, and middle and lower facial asymmetry subgroups. Of the 50 patients, 34% showed facial symmetry; and the remaining 66%, facial asymmetry. The asymmetry group comprised about 85% in the lower facial asymmetry subgroup and about 15% in the middle and lower facialasymmetry subgroup. In the cases of asymmetry, about 71% showed a shift toward the left side (about 29% toward the right side). There were no cases of asymmetry only in the middle face. The facial asymmetry was expressed as deformation in the downward direction from the subnasal line in the middle and lower facial asymmetry subgroups. The lower facial asymmetry subgroups showed deformation downward from the lip line.<BR>The results of this research suggest that angular and linear measurements of frontal facial photographs of jaw deformity patients are a useful aid for analyzing symmetry.
特定非営利活動法人日本顎変形症学会の論文