Affordable Access

deepdyve-link
Publisher Website

Computer-assisted orthognathic surgery: evaluation of mandible registration accuracy and report of the first clinical cases of navigated sagittal split ramus osteotomy.

Authors
  • Naujokat, H1
  • Rohnen, M2
  • Lichtenstein, J2
  • Birkenfeld, F2
  • Gerle, M2
  • Flörke, C2
  • Wiltfang, J2
  • 1 Department of Oral and Maxillofacial Surgery, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany. Electronic address: [email protected] , (Germany)
  • 2 Department of Oral and Maxillofacial Surgery, University Hospital of Schleswig-Holstein, Campus Kiel, Kiel, Germany. , (Germany)
Type
Published Article
Journal
International journal of oral and maxillofacial surgery
Publication Date
Oct 01, 2017
Volume
46
Issue
10
Pages
1291–1297
Identifiers
DOI: 10.1016/j.ijom.2017.05.003
PMID: 28566140
Source
Medline
Keywords
License
Unknown

Abstract

Intraoperative navigation is a helpful tool in complex anatomical regions or procedures. The mobility of the mandible in relation to the skull base limits the use of navigation tools on the lower jaw if the reference device is installed on the forehead. A new workflow that allows navigation-assisted sagittal split osteotomy in orthognathic surgery using a separate non-invasive mandibular registration technique has been developed. An evaluation of accuracy in different anatomical regions and with different registration techniques was performed on skull models and skulls with movable mandibles. The mean inaccuracy was 1.51mm, with no significant difference between anatomical sites. Using a splint-based reference device allows the movable mandible to be registered independently from the midface. Registration using metal points in the splint provides higher accuracy than using interdental anatomical landmarks. The workflow could be transferred successfully to patient treatment. Navigation-assisted osteotomy by Obwegeser-Dal Pont technique was performed without any complication in six patients. The mean deviation from the planned osteotomy line was 1.52mm. The navigated sagittal split ramus osteotomy seems to be a suitable technique to increase patient safety.

Report this publication

Statistics

Seen <100 times