Computer-aided design and fabrication of nasal prostheses: a semi-automated algorithm using statistical shape...

Area of Science:

• Biomedical Engineering
• Medical Device Design
• Anaplastology

Background:

• Traditional nasal prosthesis fabrication requires specialized anaplastologist expertise.
• Existing methods can be time-consuming and may not always achieve optimal patient-specific fit and aesthetics.

Purpose of the Study:

• To develop an innovative, automated method for designing and fabricating nasal prostheses.
• To reduce dependency on anaplastologist expertise while maintaining high quality and aesthetic outcomes.
• To enable patients to restore their normal facial appearance effectively.

Main Methods:

• Utilized statistical shape modeling with a morphable face model and 3D data (optical scanning or CT).
• Implemented an automated design process for patient-specific fit and appearance.
• Employed 3D printing for mold fabrication using standard prosthesis materials.

Main Results:

• The new method successfully met all design requirements, replacing traditional analog impression techniques.
• Prostheses fabricated using this method demonstrated aesthetic equivalence to conventionally made ones.
• Significantly reduced the skill dependency inherent in traditional prosthetic design and fabrication.

Conclusions:

• The developed method offers a promising approach for both temporary and definitive nasal prostheses.
• Facilitates potential for remote prosthesis fabrication, improving access to care.
• While requiring new skills in data acquisition and algorithm control, the technology is becoming more accessible, with future advancements promising greater independence from specialized skills.