Collagen-Polymer Hydrogel Scaffold for Periodontal Regeneration
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Solution Overview
Problem
Current treatments for periodontitis primarily focus on stabilizing the disease rather than regenerating lost periodontal tissues, leading to incomplete restoration of anatomy and physiology, and complications such as ankyloses and gingival recession.
Innovation Solution
A hydrogel composition with an interpenetrating polymer network containing collagen and synthetic polymers, embedding live human mesenchymal stem cells, is used to support tissue regeneration by releasing growth factors and extracellular vesicles, promoting wound healing and tissue repair in the periodontium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional treatments for periodontitis are used to stabilize the disease, then disease progression is controlled, but regeneration of lost periodontal tissues is insufficient
Solution Approach 1:
The invention uses a composite scaffold comprising both natural collagen and synthetic polymer components. The collagen provides bioactivity and cell recognition sites, while the synthetic polymer provides structural integrity and controlled degradation. This composite approach enables simultaneous disease stabilization and comprehensive tissue regeneration by creating an optimized microenvironment for periodontal ligament, cementum, and bone regeneration.
Solution Approach 2:
The scaffold is designed with spatially differentiated properties to match the complex layer-by-layer structure of the periodontium. Different regions of the scaffold have tailored pore sizes, degradation rates, and mechanical properties to support regeneration of specific periodontal tissues (PDL, cementum, bone) in their appropriate anatomical locations, thereby achieving complete tissue restoration.
2Ease of manufacture
If simple scaffolds are used for tissue regeneration, then ease of manufacture is improved, but ability to support complex periodontal tissue regeneration is reduced
Solution Approach 1:
The scaffold fabrication process is divided into separate stages: first forming the synthetic polymer base structure through conventional techniques, then incorporating collagen and growth factors in subsequent steps. This segmented approach maintains manufacturing simplicity while building cumulative complexity to support regeneration of multiple periodontal tissue types with different requirements.
Solution Approach 2:
The scaffold design integrates multiple functions into a single structure: mechanical support, controlled drug/growth factor delivery, cell attachment sites, and degradation products that stimulate regeneration. This multi-functional synthetic-biological composite can address the complex needs of periodontal regeneration while being manufactured using adapted conventional techniques.
3Loss of substance
If rapid degradation scaffolds are used, then loss of substance is reduced, but structural support duration is insufficient
Solution Approach 1:
The scaffold employs dynamic degradation where the synthetic polymer component degrades at a controlled rate providing long-term structural support, while the collagen component degrades more rapidly to be replaced by native extracellular matrix. This dynamic, multi-rate degradation strategy ensures continuous structural support throughout the regeneration process while ultimately achieving complete resorption and replacement by functional tissue.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The hydrogel implant facilitates the regeneration of periodontal tissues, enhancing wound healing and tissue function by providing a supportive matrix for cell growth and nutrient transport, while minimizing complications like ankyloses.
Implementation Method 1
releasing growth factors and extracellular vesicles, promoting wound healing and tissue repair
Implementation Method 2
providing a supportive matrix for cell growth and nutrient transport
Data Source
AI summary
The present disclosure provides a hydrogel composition comprising an interpenetrating polymer network (IPN) containing a biopolymer, a first synthetic polymer and a second synthetic polymer in which a contained community of live human MSCs is embedded. The collagen polymer matrix described (a) allows the embedded cells to remain in place or to migrate over short distances; (b) allows diffusion of small molecules, particularly growth factors produced by the cells or provided as a supplement, and EVs released by the cells to support the recovery of periodontium tissue function following injury.