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Developing a parametric ear model for auricular reconstruction: a new step towards patient-specific implants
E J Bos1, T Scholten2, Y Song2
1Dept. of Plastic & Reconstructive Surgery, VUMC, The Netherlands; Burn Centre Beverwijk, The Netherlands.
Summary
This study presents a customizable parametric model for 3D printing patient-specific ear implants. This method enhances ear reconstruction by improving implant fit and aesthetic outcomes.
Area of Science:
- Biomedical Engineering
- Medical Imaging
- 3D Printing
Background:
- Ear reconstruction requires precise implant frameworks for aesthetic success.
- Implant dimensions must align with surgical capabilities and tissue availability.
- Developing customizable models is crucial for personalized ear reconstruction.
Purpose of the Study:
- To develop a customizable parametric ear model for 3D printing of ear implants.
- To integrate different disciplines for improved ear reconstruction solutions.
- To adapt implant dimensions to surgical possibilities.
Main Methods:
- Computed tomography (CT) scans of cadaver ears were acquired and converted to STL data.
- An adjustable parametric model was created using Rhinoceros and Grasshopper software.
- Directed Hausdorff distance (DHD) was used to measure model-to-scan similarity.
Main Results:
- The parametric model demonstrated high similarity to ear cartilage scan data.
- Mean directed Hausdorff distance (MDHD) averaged 0.8 mm (±0.05 mm).
- Mean similarity coefficient (SC) reached 94% with a 2-mm threshold.
Conclusions:
- A parametric standard model is a feasible approach for generating custom ear implants.
- This method facilitates the creation of patient-specific implants based on existing ear images.
- The developed model aids in achieving better aesthetic and functional outcomes in ear reconstruction.
