Oral Radiology

, Volume 7, Issue 1, pp 61–65 | Cite as

A standardized method of X-ray CT for sagittal splitting osteotomy of the mandibular ramus

  • Yujiro Handa
  • Tadashi Kitajima
  • Noriaki Ikeda
  • Nobumitsu Oka
Technical Report


A useful standardized method of X-ray computed tomography (CT) was proposed for the preoperative examination of sagittal splitting osteotomy of the mandibular ramus. In our assessment conducted for cases of mandibular prognathism operated on by a modified technique, the most informative CT image of the mandibular ramus was provided by the scans between the upper and lower dentitions in the open mouth position at which the scan-plane angulation was given as parallel to the dentition in each jaw. These sections enabled preoperative assessment on the mesio-lateral thickness of the marrow space and the positional relationship between the ramal cortices and the mandibular canal together with other geography of the ramal bone structure. Using these CT images, the plane of sagittal osteotomy is predictable. A technique for obtaining standardized CT slice is proposed in this report.

Key Words

X-ray computed tomography Mandibular prognathism Sagittal splitting Osteotomy 


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  1. 1).
    Kitajima, T., Handa, Y., and Naitoh, K.: A modification of the sagittal splitting technique: Ensuring that the osteotomy lies immediately medial to the lateral cortex.J. Cranio-Max.-Fac. Surg. 17: 53–57 1989Google Scholar
  2. 2).
    Obwegeser, H.: Part I. Surgical procedure to correct mandibular prognathism and reshaping of the chin. In: Trauner, R., Obwegeser, H. (eds.): The surgical correction of mandibular prognathism with consideration of genioplasty.Oral Surg. 10: 787–799, 1957Google Scholar
  3. 3).
    Lund, E. and Sindet-Pedersen, S.: Postoperative changes after bilateral mandibular osteotomies: A computed tomography study.Oral Surg 67: 588–593, 1989CrossRefPubMedGoogle Scholar
  4. 4).
    Martis, C. S.: Complications after mandibular sagittal split osteotomy.J. Oral Maxillofac. Surg. 42: 101–103, 1984PubMedGoogle Scholar
  5. 5).
    Härle, F.: Strukturanalyse des Kiefergelenkköpfchens.Kiefer u. Gesichts-Chir. 25: 62–63, 1980Google Scholar
  6. 6).
    Kitayama, S.: A new method of intra-oral open reduction using a screw applied through the mandibular crest of condylar fractures.J. Cranio-Max.-Fac. Surg. 17: 16–23, 1989Google Scholar

Copyright information

© The Japanese Society of Dental Radiology 1991

Authors and Affiliations

  • Yujiro Handa
    • 1
  • Tadashi Kitajima
    • 2
  • Noriaki Ikeda
    • 3
  • Nobumitsu Oka
    • 1
  1. 1.Department of Oral and Maxillofacial SurgeryGifu University School of MedicineGifuJapan
  2. 2.Department of Maxillofacial Surgery and StomatologyShimada Municipal HospitalShizuokaJapan
  3. 3.Department of Oral and Maxillofacial Surgery IIAichi-Gakuin University School of DentistryNagoyaJapan

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