2013年1月
Postoperative changes in mandibular prognathism surgically treated by intraoral vertical ramus osteotomy
INTERNATIONAL JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
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- 巻
- 42
- 号
- 1
- 開始ページ
- 62
- 終了ページ
- 70
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.ijom.2012.06.024
- 出版者・発行元
- CHURCHILL LIVINGSTONE
This study investigated short- and long-term postoperative skeletal changes following intraoral vertical ramus osteotomy (IVRO) for mandibular prognathism, as determined from lateral cephalograms. The subjects were 20 patients with mandibular prognathism who had undergone surgical orthodontic treatment combined with IVRO. Lateral cephalograms were taken at six time points: 1 month before surgery, and 1 day, 3 months, 6 months, 1 year, and approximately 2 years after surgery. Intermaxillary fixation (IMF) with four monocortical screws was maintained for 1 week in all patients. Mean posterior movement of the menton (Me) was 5.9 mm at surgery. 3 months after surgery, the FMA and FH-CorMe angles had increased 6.3 and 6.2 degrees, respectively, indicating clockwise rotation of the distal segment of the mandible. This rotation was observed in all 20 patients, suggesting that postoperative rotation of the mandible in the postoperative short term is likely to occur after IVRO and could be considered an adaptation of the mastication system newly established by surgery. In the long term after IVRO, Me had moved anteriorly by only 0.9 mm. and the relapse ratio was 15.3%. These findings suggest the excellent long-term stability of surgical orthodontic treatment combined with IVRO in patients with mandibular prognathism.
- リンク情報
- ID情報
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- DOI : 10.1016/j.ijom.2012.06.024
- ISSN : 0901-5027
- Web of Science ID : WOS:000315013500011