Ligament Regenerative Engineering: Braiding Scalable and Tunable Bioengineered Ligaments Using a Bench-Top Braiding...

Area of Science:

• Biomaterials Engineering
• Regenerative Medicine
• Orthopedic Surgery

Background:

• Anterior cruciate ligament (ACL) injuries are prevalent in sports, often necessitating surgical repair using autografts or allografts.
• Current graft options have limitations, including donor site morbidity and inconsistent quality, driving the need for advanced bioengineered alternatives.

Purpose of the Study:

• To design and develop a cost-effective, bench-top 3D braiding machine for fabricating scalable and tunable bioengineered ligaments.
• To demonstrate the machine's capability to control key fabrication parameters and produce ligament scaffolds with suitable properties for tissue regeneration.

Main Methods:

• Development of a novel bench-top 3D braiding machine.
• Fabrication of bioengineered ligament constructs using controlled braiding parameters (angle, picks per inch).
• Characterization of pore size and theoretical peak load capacity of the fabricated constructs.

Main Results:

• The braiding machine successfully controlled braiding angle and picks per inch.
• Demonstrated pore sizes suitable for vascularization and bone regeneration.
• Theoretical calculations indicate the potential to fabricate bioengineered ligaments with a peak load capacity significantly exceeding that of the native human ACL.

Conclusions:

• A cost-effective and scalable 3D braiding machine was developed for creating tunable bioengineered ligaments.
• The machine offers precise control over structural properties, enabling the fabrication of ligament scaffolds with potential for enhanced mechanical strength and tissue integration.
• This technology holds promise for regenerative engineering applications, particularly in addressing ACL injuries.