7 0 0 0 OA Le Fort I型骨切り術に伴う鼻部の変化
- 著者
- 布田 花子 森田 修一 山田 秀樹 花田 晃治 齊藤 力 高木 律男
- 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.3, pp.85-93, 2002-12-15 (Released:2011-02-09)
- 参考文献数
- 16
- 被引用文献数
- 1
The purpose of this study was to investigate the changes of the soft tissue profile in the nose following Le Fort I osteotomy in skeletal Class III patients.The subjects were 30 females who underwent twojaw surgery to correct anterior reversed occlusion, and who were classified into three groups according to the directions of surgical displacement of the maxilla.1. Advancement-Impaction group (n=11)2. Advancement group (n=12)3. Advancement-Downgraft group (n=7)For each patient, lateral cephalograms, taken preoperatively and postoperatively, were traced and superimposed, and linear and angular measurements were obtained. And, alinasal width was measured on frontal facial photographs taken preoperatively and postoperatively. These data from the three groups were compared.The results were as follows:1. In the Advancement-Impaction group, Pronasale and Subnasale were displaced in the upward and forward direction after Le Fort I osteotomy.2. In the Advancement group, Pronasale and Subnasale were displaced in the forward direction after surgery.3. In the Advancement-Downgraft group, Pronasale was displaced in the forward direction, and Subnasale was displaced in the downward direction.4. Alinasal width was increased in the three groups with advancement of the maxilla.In conclusion, there were differences in the postoperative changes of the nose, with different movement of the maxilla.
1 0 0 0 OA オトガイ形成術による軟組織側貌の変化
- 著者
- 竹山 雅規 森田 修一 山田 秀樹 武藤 祐一 齊藤 力 高木 律男 花田 晃治
- 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.13, no.3, pp.105-110, 2003-12-15 (Released:2011-02-09)
- 参考文献数
- 17
- 被引用文献数
- 1
This study investigated the soft tissue profile change of the chin following genioplasty. The subjects were 20 females who underwent genioplasty. They were divided into two groups depending on the directions of surgical displacement of the chin. In 11 patients anterior repositioning was made (forward movement group) and in 9 patients posterior repositioning was made (backward movement group).For each patient, lateral cephalograms taken preand postoperatively were traced and superimposed, and then linear measurements were obtained.The results were as follows: 1. There were differences in soft tissue reaction to hard tissue displacement between the forward movement group and backward movement group.2. In the forward movement group, the size of the chin increased as a result of further forward displacement of soft tissue pogonion in spite of forward displacement of lower labial sulcus. In the backward movement group, the size of the chin decreased as a result of backward displacement of soft tissue pogonion and forward displacement of lower labial sulcus.3. The horizontal displacement ratio of soft tissue pogonion to pogonion was 148% in the forward movement group, and 33% in the backward movement group.4. There was a significant positive correlation between the horizontal change of pogonion and soft tissue pogonion, horizontal change of menton and soft tissue menton, horizontal change of pogonion and the size of the chin, and horizontal change of menton and the size of the chin. On the other hand, in the forward movement group, there was no correlation between skeletal changes and soft tissue changes of the chin.
- 著者
- 高橋 功次朗 丹原 惇 森田 修一 小林 正治 池田 順行 林 孝文 齋藤 功
- 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
- 巻号頁・発行日
- vol.27, no.1, pp.1-7, 2017
Cephalometric prediction is still widely used for treatment planning in surgical orthodontic patients. However, there have been few reports on the relationship between mandibular midline changes by orthognathic surgery and the amount of bilateral setback movement on lateral cephalograms. The aim of this study was to clarify the relationships between the difference in mandibular setback amount for deviated and non-deviated sides and the amount of middle region displacement on cephalometric prediction in patients with mandibular prognathism and deviation.<br>The subjects comprised 15 patients diagnosed as mandibular prognathism with skeletal deviation at the orthodontic clinic, Niigata University Medical and Dental Hospital. All patients underwent only mandibular setback surgery involving midline correction by sagittal split ramus osteotomy(SSRO). Frontal and lateral cephalograms taken just before and immediately after orthognathic surgery were used for measurements. X-Y coordinates were constructed using the occlusal plane on the preoperative lateral cephalogram for the X coordinate and the perpendicular line drawn intersecting the X line at the Sella for the Y coordinate. The amount of posterior movement of the distal segment and middle region displacement were determined by superimposition of pre-and postoperative lateral cephalograms. The postoperative midline changes were measured linearly using a study model taken at just before orthognathic surgery. We examined the relationship between the average amount of operative movement for deviated and non-deviated sides and the amount of anteroposterior changes of the incisal region. The relationship between the difference in operative movement for deviated and non-deviated sides and postoperative midline changes was also examined.<br>Significant correlations were found between the bilateral difference of operative movement and the amount of anteroposterior changes of the incisal region. A significant correlation was also revealed between the bilateral difference of operative movement and horizontal middle region. In addition, a significant regression formula was obtained as β=0.65α+1.17(α: bilateral difference of mandibular posterior movement (mm), β: lateral movement of mandibular midline(mm))by regression analysis.<br>The present results suggest that, in cases with skeletal deviation, it is possible to regard the average value of anteroposterior movement of distal segments on both sides as a predictive factor for the posterior position of the incisal region. Also, the results suggest that the amount of midline correction can be predicted from the bilateral difference of operative movement. Since there is diversity and much variation in the movement of distal segments, it is not easy to predict the amount of midline displacement during orthognathic surgery. However, this regression formula may be useful for orthodontists and surgeons to plan surgical orthodontic treatment.