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Current Directions in Biomedical Engineering

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Buzug, Thorsten M. / Haueisen, Jens / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Kraft, Marc / Lenarz, Thomas / Leonhardt, Steffen / Malberg, Hagen / Penzel, Thomas / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Urban, Gerald A.


CiteScore 2018: 0.47

Source Normalized Impact per Paper (SNIP) 2018: 0.377

Open Access
Online
ISSN
2364-5504
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A computer-assisted optimization approach for orthognathic surgery planning

Frederic Weichel
  • Corresponding author
  • Institute of Medical Biometry and Informatics, Marsilius-Arkaden, Turm West Im Neuenheimer Feld 130.3, Heidelberg, Germany
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/ Urs Eisenmann / Sarah Richter / Niclas Hagen / Thomas Rückschloß
  • University Hospital Heidelberg, Department of Oral and Maxillofacial Surgery, Heidelberg, Germany
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/ Christian Freudlsperger
  • University Hospital Heidelberg, Department of Oral and Maxillofacial Surgery, Heidelberg, Germany
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/ Hartmut Dickhaus
Published Online: 2019-09-18 | DOI: https://doi.org/10.1515/cdbme-2019-0011

Abstract

Orthognathic surgery is used to treat misaligned jaws in adults by repositioning them. Intervention planning has to take into account different clinical, anatomical, functional, and aesthetic parameters to determine the optimal position. Current planning systems usually present 3D surface models obtained from a CT or Cone-Beam scan of the patient. The surgeon then interactively positions the upper and lower jaw. Thus, the surgeon can manually optimize anatomical aspects but has to consider functional and aesthetic effects simultaneously, which may be error-prone. We are developing a computer-assisted planning system which generates an optimized position for both jaws based on different analyses (cephalometric, plaster model, photostat) of the head, using a gradient descent algorithm. For this purpose, landmarks are interactively identified on a 3D surface representation. The system is developed as a plugin for MITK utilizing a knowledge base realized in the sematic web standard RDFS, which is queried with SPARQL requests. In a preliminary evaluation with five different cases we compare the automatically generated planning proposal with the planning results of a maxillofacial expert (ground truth). Good general agreement is observed, although more research for the identification and development of 3D cephalometric analyses is needed.

Keywords: surgery planning; gradient descent; virtual surgery; orthognathic surgery; computer assisted; 3D cephalometry

About the article

Published Online: 2019-09-18

Published in Print: 2019-09-01


Citation Information: Current Directions in Biomedical Engineering, Volume 5, Issue 1, Pages 41–44, ISSN (Online) 2364-5504, DOI: https://doi.org/10.1515/cdbme-2019-0011.

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© 2019 by Walter de Gruyter Berlin/Boston. This work is licensed under the Creative Commons Attribution 4.0 Public License. BY 4.0

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