Design, Stereolithographic 3D Printing, and Characterization of TPMS Scaffolds

Area of Science:

• Biomaterials Engineering
• Regenerative Medicine
• Computational Modeling

Background:

• Tissue loss, particularly in bone, presents significant challenges in healthcare.
• Scaffolds are crucial for promoting bone tissue regeneration.
• Developing scaffolds with appropriate microstructures and mechanical properties is essential.

Purpose of the Study:

• To create advanced porous scaffolds for bone regeneration using additive manufacturing and computational methods.
• To design scaffolds with microstructures mimicking cancellous bone.
• To analyze the relationship between scaffold design parameters and mechanical properties.

Main Methods:

• Utilized additive manufacturing (stereolithography) with dental resin to 3D print scaffolds.
• Employed computational methods to design triply periodic minimal surfaces (TPMS), specifically Schwarz primitive and gyroid surfaces.
• Conducted morphological and mechanical analyses to evaluate scaffold properties.

Main Results:

• Successfully fabricated porous scaffolds with complex microstructures and high pore interconnectivity.
• Demonstrated that design parameters, such as wall thickness, influence scaffold mechanical properties (elastic modulus, compressive strength).
• Established a power-law relationship between relative density and elastic modulus for the TPMS scaffolds.

Conclusions:

• 3D-printed TPMS scaffolds offer a promising approach for bone tissue engineering.
• Computational design and additive manufacturing enable the creation of bone scaffolds with tailored microstructures and mechanical characteristics.
• The findings provide a foundation for optimizing scaffold design for enhanced bone regeneration.