骨格型下顎前突症の形態的特徴と外科的矯正治療に伴う変化

概要

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The purpose of this study was to evaluate morphological characteristics of cases with skeletal Class III malocclusion, who had underwent orthognathic surgery with sagittal splitting ramus osteotomy, and the changes of hard and soft tissues profiles following the osteotomy. The lateral cepharograms of 20 patients, which were taken at initial examination, just before the osteotomy and at removal of orthodontic appliances, were used as samples. Morphologically, the patients showed Class III skeletal profile with excess mandibular prognathism and large lower facial height. After orthognathic surgery, intermaxillary relationship was largely corrected due to 9.4 mm of set-back of the mandible, while the lower anterior facial height was little changed. There were significant correlations between the movement of hard- and soft-tissues of the mandible. The results show that orthognathic surgery was effective treatment for correction of skeletal discrepancy and soft-tissue profile of severe skeletal Class III patients, except for correction of vertical problem.
北海道医療大学の論文
2001-12-31