Composite Soft Tissue Scaffold With Porous Core and Tensile Support
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Solution Overview
Problem
Current scaffolds for soft tissue repair and reconstruction lack optimal porosity, surface area, and mechanical properties necessary for effective cellular ingrowth and tissue regeneration, often causing inflammation and incomplete healing due to inadequate void volume and mechanical load sharing.
Innovation Solution
A composite scaffold with a support structure and a porous material or hydrogel, providing mechanical reinforcement, adequate extracellular matrix deposition space, and a high surface area for cellular proliferation, while maintaining shape under tension, and being bioabsorbable to support healing and tissue regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mesh-like scaffolds are used to provide mechanical support, then mechanical strength is improved, but porosity and void volume are insufficient for tissue regeneration
Solution Approach 1:
The patent embeds a porous matrix material within the mesh-like scaffold structure, creating a nested configuration where the porous material is contained within the mechanical support framework. This allows the outer mesh to provide tensile strength and structural integrity while the inner porous material provides adequate void volume and surface area for cellular ingrowth and tissue regeneration.
Solution Approach 2:
The patent creates a composite scaffold by combining two distinct materials with complementary properties: a mesh-like material providing mechanical strength and a porous matrix material providing porosity and void volume. This composite structure resolves the contradiction by integrating the beneficial properties of both materials into a single functional unit.
2Volume of stationary object
If biologic scaffolds are processed to increase porosity, then cellular ingrowth is improved, but mechanical strength decreases
Solution Approach 1:
The patent divides the scaffold into two functional segments: a mesh-like outer structure that provides mechanical strength and a porous matrix inner structure that provides porosity for cellular ingrowth. By segmenting the scaffold into these distinct functional zones, each component can be optimized for its specific purpose without compromising the other.
Solution Approach 2:
The patent creates a composite structure combining a mechanically strong mesh material with a porous biologic matrix material. The mesh component carries the mechanical load while the porous matrix enables cellular infiltration and tissue regeneration, resolving the strength-porosity tradeoff through material composition rather than relying on a single material to provide both properties.
3Strength
If permanent synthetic polymers are used for mechanical support, then mechanical properties are improved, but inflammation and adverse reactions occur
Solution Approach 1:
The patent changes the material parameter from permanent synthetic polymers to bioabsorbable materials that maintain mechanical strength during the healing period and then gradually degrade. This parameter change allows the scaffold to provide necessary mechanical support initially and then be replaced by regenerated tissue without causing chronic inflammation from permanent foreign material.
Solution Approach 2:
The patent uses bioabsorbable materials that are temporarily present to provide mechanical support during healing, then naturally degrade and are discarded by the body once their function is complete. This temporary presence followed by natural degradation avoids the chronic inflammation associated with permanent synthetic materials while still providing the necessary mechanical properties during the critical healing period.
4Strength
If planar warp knit textiles are used, then mechanical strength is improved, but surface area and void volume are insufficient
Solution Approach 1:
The patent transitions from a two-dimensional planar warp knit textile to a three-dimensional structure by incorporating a porous matrix material within the mesh framework and adding spacer elements that create depth and volume. This dimensional transition increases both the surface area available for cellular attachment and the void volume for tissue regeneration while maintaining the mechanical strength provided by the knit textile structure.
Data Source
AI summary
A composite scaffold having a highly porous interior with increased surface area and void volume is surrounded by a flexible support structure that substantially maintains its three-dimensional shape under tension and provides mechanical reinforcement during repair or reconstruction of soft tissue while simultaneously facilitating regeneration of functional tissue.