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Three-Dimensional-Printed Thermoplastic Polyurethane (TPU) Graft and H-Button Stabilization System for
Menna Nahla1, Yara Abouelela2, Mohammed Amer1
1Department of Small Animal Surgery and Radiology, College of Veterinary Medicine, Cairo University, Giza 12211, Egypt.
Veterinary Sciences
|August 28, 2025
Summary
This study developed a 3D-printed graft system to repair cranial cruciate ligament (CrCL) ruptures in dogs. The novel system successfully stabilized canine stifles, showing promise for orthopedic reconstruction.
Area of Science:
- Biomedical Engineering
- Veterinary Orthopedics
- Materials Science
Background:
- Cranial cruciate ligament (CrCL) rupture is a prevalent cause of stifle instability and osteoarthritis in dogs.
- Current treatments often involve complex surgical procedures with varying outcomes.
- There is a need for innovative, biomechanically sound reconstruction methods.
Purpose of the Study:
- To develop and biomechanically evaluate a novel intra-articular reconstruction system for canine CrCL injuries.
- To mimic the natural ligament's function and restore stifle joint stability.
- To assess the potential of 3D-printed thermoplastic polyurethane (TPU) for ligament reconstruction.
Main Methods:
- Developed a reconstruction system using a 3D-printed TPU graft, cerclage wire, and H-button fixation.
- Characterized native canine CrCL properties (inclination angle, dimensions, volume, tensile strength, elongation).
- Biomechanically tested the reconstruction system in CrCL-deficient canine stifle joints (ex vivo).
Main Results:
- The 3D-printed TPU graft exhibited greater flexibility than the native CrCL, though with lower tensile strength.
- The novel reconstruction system effectively stabilized the stifle joint, providing repeatable fixation.
- Significant correlations were observed between native CrCL volume and canine age/body weight.
Conclusions:
- The developed 3D-printed TPU reconstruction system demonstrates mechanical suitability for ex vivo canine stifle stabilization.
- 3D-printed TPU shows potential as a viable material for ligament reconstruction in veterinary orthopedics.
- Further in vivo studies are warranted to evaluate long-term performance, implant integration, and clinical efficacy.
