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Comparing 3-dimensional virtual methods for reconstruction in craniomaxillofacial surgery.

Stefano Benazzi1, Sascha Senck

  • 1Department of Anthropology, University of Vienna, Vienna, Austria. stefano.benazzi@univie.ac.at

Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons
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PubMed
Summary

Virtual reconstruction of osteomized zygomatic bones was simulated. Thin plate spline warping generally yielded better results than mirroring, though mirroring with registration is a viable option for low asymmetry cases.

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Area of Science:

  • Craniofacial surgery
  • Medical imaging
  • Biomedical engineering

Background:

  • Zygomatic bone reconstruction is crucial in craniofacial surgery.
  • Accurate virtual reconstruction aids in pre-operative planning.
  • Assessing different digital reconstruction methods is essential.

Purpose of the Study:

  • To simulate and compare virtual reconstruction methods for osteomized zygomatic bones.
  • To evaluate the accuracy of mirror imaging and thin plate spline warping techniques.

Main Methods:

  • Computed tomography (CT) scans of 15 skulls were acquired.
  • Virtual osteotomy of the left zygomatic bone was performed.
  • Reconstructions were generated using mirror imaging (with/without best fit registration) and thin plate spline interpolation.

Main Results:

  • Thin plate spline warping generally outperformed mirroring approaches in reconstruction accuracy.
  • Mirror imaging with best fit registration showed promising results for low-skull asymmetry.
  • Accuracy was evaluated by comparing reconstructions to the original zygomatic bone.

Conclusions:

  • Thin plate spline warping and best fit registration of mirrored hemifaces offer improved accuracy over simple mirroring.
  • Mirroring can be a practical alternative for zygomatic bone reconstruction in cases of minimal asymmetry.
  • The choice of method depends on the degree of facial asymmetry.