1 0 0 0 OA 下顎前突症患者に対する咬合平面の時計方向回転を行う上下顎移動術の適用
- 著者
- 飯野 光喜 新津 恒太 中村 芳樹 大谷 宣夫 福田 雅幸
- 出版者
- 特定非営利活動法人 日本顎変形症学会
- 雑誌
- 日本顎変形症学会雑誌 (ISSN:09167048)
- 巻号頁・発行日
- vol.12, no.2, pp.77-83, 2002-08-15 (Released:2011-02-09)
- 参考文献数
- 14
- 被引用文献数
- 3 5
The aim of this article is to discuss the effectiveness of clockwise rotation of the occlusal plane for skeletal class III deformities with the use of two-jaw surgery.The most popular orthognathic surgical management for class III malocclusion is mandibular setback using a bilateral sagittal splitting ramus osteotomy (SSRO). However, it has been suggested that, with the aid of an operative method using SSRO alone, complete elimination of the protruded appearance in the mental region is hardly attainable, in some cases. To obtain better functional and esthetic results for patients with class M deformities, clockwise rotation of the occlusal plane, using two-jaw surgery, appears to be considerably useful surgical management. The changes provided by an increased occlusal plane angle include 1) advancement of the midface; 2) rotation of the chin posteriorly; 3) a decreased maxillary incisor angle; 4) an increased mandibular plane angle; 5) decreased posterior facial height. We emphasize that, by appropriate usage of clockwiserotation of the occlusal plane, more favorable functional and esthetic results for the correction of skeletal class deformity will be enabled in some cases.
1 0 0 0 顎矯正手術における上顎骨位置決めの精度に関する検討
- 著者
- 飯野 光喜 新津 恒太 堀内 俊克 松島 凛太郎 村上 夏帆 瀬戸 〓一 関谷 利子 中村 芳樹 桑原 洋助
- 出版者
- THE JAPANESE SOCIETY FOR JAW DEFORMITIES
- 雑誌
- 日本顎変形症学会雑誌 = The Japanese journal of jaw deformities (ISSN:09167048)
- 巻号頁・発行日
- vol.10, no.3, pp.273-280, 2000-12-15
- 参考文献数
- 22
- 被引用文献数
- 4 3
The accuracy of positioning the osteotomized maxilla during orthognathic surgery was assessed in 26 patients, comparing the use of an external reference point placed on the forehead skin (SERP), and an external reference point consisting of a bone screw placed at the forehead bone (BERP). In all cases, the unoperated mandible was used to provide an anteroposterior and transverse maxillary position, through use of an intermediate splint. In 14 cases, the distance between the SERP and the maxillary central incisor was measured, to determine the maxillary vertical dimensions. In 12 cases, measurements between the BERP the and maxillary central incisor were made.<BR>All preoperative lateral cephalometric radiographs were traced by one investigator, and these tracings were superimposed on postoperative lateral chephalograms (3 to 6 days after surgery), respectively. The actual changes in the vertical and horizontal position of U1 were measured perpendicular and parallel to the Frankfort horizontal plane. The actual change of the palatal plane angle was also measured. These values of actual change were compared with the prediction tracings made by measurements obtained from model surgery, and the difference between planned and actual movements was calculated.<BR>The mean difference of U1 anteroposterior movement was 1.5±2.0mm in the SERP group, and 1.2±1.1 mm in the BERP group. The mean difference of U1 vertical movement was 1.8 ±2.8mm in the SERP group, and 0.5±0.3mm in the BERP group. And the mean difference of palatal plane angle rotation in the SERP group was 2.7±6.2°, and 1.6±1.8° in the BERP group. Statistical analysis showed a significant difference between the SERP group and the BERP group in the U1 vertical difference (t-test, p<0.05).<BR>The results of this investigation revealed less accuracy in the actual three-dimensional maxillary movements of the SERP group, compared with the BERP group. And this study also showed that use of the BERP will allow accurate three-dimensional control of the maxillary position, especially in the vertical dimension. However, the maxillary repositioning technique using BERP still remains subject to operator error, and other numerous possible sources of error were identified, which may lead to an incorrect result.