Development of a Novel Hybprinter-SAM for Functionally Graded Tissue Engineering Constructs with Patterned and...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Engineering native-mimetic tissue constructs with biological and structural gradients is a significant challenge.
• Existing bioprinting methods struggle to replicate the complex heterogeneity of native tissues.

Purpose of the Study:

• To develop a versatile bioprinting platform capable of creating complex, functionally graded tissue constructs.
• To demonstrate the utility of this platform in a bone-tendon regeneration model.

Main Methods:

• Development of Hybprinter-SAM, integrating syringe extrusion (SE), acoustic droplet ejection (ADE), and molten material extrusion (MME).
• Optimization of printing processes and biomaterials for printability, mechanical integrity, and biocompatibility.
• Creation of multi-material constructs with controlled stiffness gradients and patterned biochemical signals (FGF-2).

Main Results:

• Hybprinter-SAM successfully fabricated constructs with mechanical gradients spanning seven orders of magnitude of stiffness.
• Precise patterning and localization of biochemical signals were achieved within the printed scaffolds.
• A bone-tendon construct with patterned FGF-2 promoted markers of fibrocartilage development in a proof-of-concept study.

Conclusions:

• Hybprinter-SAM offers a versatile solution for engineering complex, native-mimetic tissue constructs.
• The platform demonstrates significant potential for advancing diverse tissue engineering and regenerative medicine applications.
• This technology enables the creation of functionally graded materials crucial for replicating native tissue complexity.