下顎の後方移動術に伴うオトガイ部軟組織の変化―下顎枝矢状分割術単独施行症例とオトガイ形成術併用症例との比較―

DOI 参考文献10件
  • 大町 浩史
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野
  • 原田 清
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野
  • 佐藤 昌
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野
  • 盛島 聖子
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野
  • 樺沢 勇司
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野
  • 丸岡 豊
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野
  • 小村 健
    東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系口腔機能再建学講座顎口腔外科学分野

書誌事項

タイトル別名
  • Soft Tissue Changes after Setback Surgery with and without Reduction Genioplasty
  • 下顎枝矢状分割術単独施行症例とオトガイ形成術併用症例との比較

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抄録

Soft tissue changes in the chin were compared between patients undergoing sagittal split ramus osteotomy (SSRO) for mandibular setback with and without reduction genioplasty. Twenty patients with symmetrical skeletal Class III malocclusion were examined. Twelve underwent SSRO alone (group I), and 8 underwent SSRO combined with reduction genioplasty (group II). Reduction genioplasty was performed by two horizontal osteotomies, removing the bony wedge, and posterosuperior movement of the inferior segment of the chin. Lateral cephalograms were obtained preoperatively and 6 months postoperatively. Pre- to postoperative changes in the positions of hard-tissue points (B-point [B], pogonion [Ng], and menton [Me]) and soft-tissue B-point [sB], soft-tissue pogonion [sPog], and menton [sMe] were measured on the cephalograms. The ratio of the soft tis-sue movement to the hard tissue movement was also calculated. Though superior movement of Me was significantly larger in group II than in group I, there were no significant differences in the superior movement ratios of sMe to Me between the two groups. However, the posterior movement ratio of sPog to Pog was significantly larger in group I than in group H. These results suggest that the reduction genioplasty performed by two horizontal osteotomies, removing the bony wedge, and posterosuperior movement of the inferior segment of the chin had little effect on the posterior movement of the chin. Therefore, in patients with skeletal class III malocclusion, reduction genioplasty should be applied mainly to vertical shortening of the chin.

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