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A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
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Planning of mandibular reconstructions based on statistical shape models.

Stefan Raith1, Sebastian Wolff2, Timm Steiner3

  • 1Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany. sraith@ukaachen.de.

International Journal of Computer Assisted Radiology and Surgery
|July 10, 2016
PubMed
Summary

This study introduces a computer-based method to propose mandibular reconstruction shapes using residual bone geometry. The algorithm aids surgical planning for defects, improving accuracy for both small and large missing parts.

Keywords:
3D printingMandibleMorphologyRandom field variationsReconstructionScaffolds

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Area of Science:

  • Biomedical Engineering
  • Computer-Aided Surgery
  • Medical Imaging

Background:

  • Reconstructing large mandibular defects is challenging, often relying on surgeon experience.
  • Current surgical planning for mandibular defects lacks precise shape prediction.

Purpose of the Study:

  • To develop a computer-based method for proposing mandibular reconstruction shapes.
  • To generate reconstruction shapes from existing residual mandible geometry.

Main Methods:

  • Utilized CT scan data from 60 mandibles for a numerical procedure.
  • Developed standardized meshes and applied statistical evaluations (Principal Component Analysis) to capture shape variations.
  • Created an algorithm to propose reconstruction shapes based on residual mandible parts.

Main Results:

  • The novel method demonstrated sufficient accuracy in virtual reconstructions.
  • Average deviations were [Formula: see text] mm for small defects and 5 mm for large defects.
  • The algorithm proved effective for planning surgical reconstructions.

Conclusions:

  • The developed algorithm is a valuable tool for planning mandibular reconstructions.
  • Proposed shapes can serve as templates for computer-aided manufacturing, including 3D printing with biocompatible materials.