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Microtia Ear Reconstruction with Patient-Specific 3D Models-A Segmentation Protocol.

Juan Pablo Rodríguez-Arias1, Alessandro Gutiérrez Venturini2, Marta María Pampín Martínez1

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|July 9, 2022
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Summary

This study introduces a protocol for creating patient-specific, 3D-printed auricular models for microtia reconstruction. These sterilizable 3D templates improve cartilage carving accuracy and reduce surgical time and material waste.

Keywords:
3D printingmicrotiareconstructionsurface scansurgical planning

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Area of Science:

  • Medical Engineering
  • Plastic Surgery
  • Biomedical Imaging

Background:

  • Traditional 2D templates are being replaced by 3D templates for intra-operative guidance in microtia reconstruction.
  • Autogenous cartilage frameworks are essential for reconstructing the auricle in microtia cases.

Purpose of the Study:

  • To introduce a protocol for fabricating patient-specific, 3D printed, and sterilizable auricular models.
  • To provide enhanced visual guides for intra-operative carving of autogenous cartilage frameworks.

Main Methods:

  • Utilized high-resolution surface 3D scanning (Artec Eva) of the unaffected ear.
  • Employed digital mirroring, segmentation, and disassembly into component parts (helix, antihelix, tragus, base).
  • Fabricated physical, sterilizable 3D printed models for each segmented part.

Main Results:

  • The segmentation technique facilitates precise modeling and carving of the cartilage scaffold.
  • Achieved adequate height, depth, width, and thickness for the reconstructed auricle.
  • Demonstrated reduction in surgical time and the amount of costal cartilage required.

Conclusions:

  • The developed technique effectively uses surface scanning and 3D printing for patient-specific auricular reconstruction.
  • Produces sterilizable 3D templates that enhance the accuracy of cartilage framework carving.
  • Offers a viable method for improving outcomes in microtia reconstruction.