Clinical Study of Intraoral Vertical Ramus Osteotomy. Part 1. Radiologic Study of Proximal Segments.

DOI 14 Citations 18 References
  • HAGINO HIROKO
    Department of Oral Surgery, Nagoya University, School of Medicine
  • SAWAKI YOSHIHIRO
    Department of Oral Surgery, Nagoya University, School of Medicine
  • ODA TOMOO
    Department of Oral Surgery, Nagoya University, School of Medicine
  • OHKUBO HAJIME
    Department of Oral Surgery, Nagoya University, School of Medicine
  • YAMAMOTO HIROKI
    Department of Oral Surgery, Nagoya University, School of Medicine
  • HIBI HIDEHARU
    Clinic of Dentistry and Oral Surgery, Holy Spirit Hospital
  • UEDA MINORU
    Department of Oral Surgery, Nagoya University, School of Medicine

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Other Title
  • 下顎枝垂直骨切り術（ＩＶＲＯ）に関する臨床的研究　第１報　近位骨片のＸ線学的検討
  • Part.1 Radiologic Study of Proximal Segments
  • 第1報近位骨片のX線学的検討

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Intraoral Vertical Ramus Osteotomy (IVRO) is becoming widely used for correction of mandibular skeletal deformities in Japan.<BR>The purpose of this study was to investigate the postoperative change of the proximal segments after bilateral IVRO. Retrospective radiographic assessments were performed for fifteen patients with mandibular prognathism who had been corrected surgically by bilateral IVRO<BR>The results were as follows:<BR>1. On lateral cephalometric analysis, the ramus inclination increased at one week after surgery and decreased gradually during one year.<BR>2. On posteroanterior cephalometric analysis, Gonia showed lateral displacements at one week after surgery and returned internally during one year.<BR>3. The condyles moved anteroinferiorly after surgery.

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