Melt Electrowriting of Complex 3D Anatomically Relevant Scaffolds.

Area of Science:

• Biomaterials Science
• Additive Manufacturing
• Tissue Engineering

Background:

• Manufacturing complex 3D scaffolds for soft tissue engineering is challenging.
• Melt electrowriting (MEW) offers precise fiber deposition but is limited to simple geometries.
• Overcoming MEW's limitations is crucial for advanced tissue regeneration.

Purpose of the Study:

• To enable the fabrication of complex, anatomically relevant fibrous scaffolds using MEW.
• To overcome the inherent limitations of MEW for creating intricate 3D structures.
• To demonstrate the potential for patient-specific scaffold manufacturing.

Main Methods:

• Utilized advanced modeling of electric field strength in MEW.
• Combined conductive core mandrels with non-conductive 3D printed models.
• Experimentally validated the optimized MEW process for complex geometries.
• Leveraged computed tomography data for patient-specific scaffold design.

Main Results:

• Successfully fabricated complex fibrous scaffolds with controlled micrometric features.
• Manufactured anatomically relevant aortic root scaffolds, including sinuses of Valsalva.
• Achieved biomimetic microstructures and mechanical properties in the scaffolds.
• Demonstrated patient-specific scaffold fabrication from clinical imaging data.

Conclusions:

• MEW can be adapted to produce complex, patient-specific fibrous scaffolds.
• The developed method overcomes previous geometric limitations of MEW.
• This advancement holds significant promise for soft tissue engineering and regenerative medicine.