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Hybrid Hydrogels Augmented via Additive Network Integration (HANI) for Meniscal Tissue Engineering Applications.

Anthony El Kommos¹, Praveen Magesh², Samantha Lattanze¹

¹Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA.

Gels (Basel, Switzerland)

|April 25, 2025

Summary

A new Hybrid Hydrogels Augmented via Additive Network Integration (HANI) scaffold improves mechanical strength for knee meniscus tissue engineering. This novel approach offers a promising, cost-effective solution for orthopedic soft tissue injuries.

Keywords:

confined compression hydrogel meniscus poroviscoelastic stress relaxation tissue engineering

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Area of Science:

Biomaterials Science
Tissue Engineering
Orthopedic Surgery

Background:

Orthopedic soft tissue injuries, particularly to the knee meniscus, pose significant clinical challenges.
Current bioengineered meniscal replacements often exhibit limitations in biomechanical performance and biological integration.
Restoring full mechanical function after meniscal injury remains a critical unmet need.

Purpose of the Study:

To introduce and evaluate a novel scaffold fabrication approach, Hybrid Hydrogels Augmented via Additive Network Integration (HANI), for meniscal tissue engineering.
To enhance the mechanical properties and anisotropic characteristics of scaffolds for improved meniscal function.
To assess the potential of HANI scaffolds as a viable alternative to current tissue engineering strategies.

Main Methods:

Fabrication of HANI scaffolds by combining cross-linked gelatin hydrogels with polycaprolactone (PCL) additive networks using Fused Deposition Modeling (FDM).
Utilized custom Stereolithography (SLA)-printed molds for precise dimensional control and integration of PCL networks.
Conducted mechanical evaluations including compressive stiffness, stress relaxation, and load-bearing capacity assessments.

Main Results:

HANI scaffolds demonstrated enhanced compressive stiffness and improved stress relaxation behavior compared to hydrogel-only scaffolds.
Significant improvements in load-bearing capacity were observed, particularly with circumferential and 3D PCL reinforcements.
The additive PCL networks effectively replicated the anisotropic properties crucial for meniscal function.

Conclusions:

The HANI scaffold fabrication approach offers a scalable, cost-effective, and tunable method for meniscal tissue engineering.
HANI scaffolds present a promising platform for developing advanced biomaterials to address orthopedic soft tissue injuries.
This novel approach has the potential to overcome limitations of current meniscal replacement strategies.