Tissue Repair Scaffold With Electrospun Adhesive Grid
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Solution Overview
Problem
Existing biodegradable scaffolds for tissue repair, particularly in musculoskeletal tissue engineering, face challenges with poor mechanical properties and inadequate bonding between electrospun materials and woven fabrics, which limits their effectiveness in rotator cuff repair and wound dressing applications.
Innovation Solution
A scaffold comprising multiple porous polymer fibre layers with an adhesive component having a lower melting temperature than the material layers, where the adhesive component is electrospun in a grid pattern to facilitate bonding through fibre entanglement and chemical bonds, ensuring structural integrity and biocompatibility without compromising porosity or mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrospun materials are used to create scaffolds, then biocompatibility and cell response are improved, but mechanical properties deteriorate
Solution Approach 1:
The patent combines electrospun polymer fibres with woven fabric to create a composite scaffold structure. The electrospun layer provides biocompatibility and mimics extracellular matrix, while the woven fabric provides mechanical strength and structural support. This composite approach resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The patent modifies the electrospinning process parameters including fibre diameter, alignment, porosity, and layer thickness to optimize both biocompatibility and mechanical properties. By controlling fibre morphology and structural parameters, the scaffold achieves enhanced mechanical strength while maintaining cellular compatibility.
2Stability of the object's composition
If adhesive solutions are used to bond fabric and electrospun layers, then bonding between layers is improved, but porosity and structural integrity may deteriorate
Solution Approach 1:
The patent uses a carefully selected adhesive solution that acts as an intermediary between the woven fabric and electrospun layers. The adhesive is applied in controlled amounts to ensure strong bonding while minimizing pore blockage. The adhesive formulation and application method are optimized to maintain porosity for cell infiltration and nutrient transport.
Solution Approach 2:
The patent employs porous adhesive materials and techniques that preserve the porous structure of the scaffold. The adhesive is selected and applied to maintain interconnected porosity, ensuring that bonding does not compromise the scaffold's ability to support cell growth and tissue regeneration.
3Stability of the object's composition
If chemical or plasma treatments are applied to improve bonding, then adhesion between materials is improved, but complexity of the manufacturing process deteriorates
Solution Approach 1:
The patent utilizes self-service approaches where the materials themselves provide bonding capabilities through their inherent properties. The electrospun fibres and woven fabric are selected to have natural affinity and adhesion characteristics that reduce or eliminate the need for complex chemical or plasma treatments, thereby simplifying the manufacturing process while maintaining strong interlayer bonding.
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 proposed scaffold achieves enhanced mechanical properties and biocompatibility, allowing for effective tissue repair by maintaining structural integrity and promoting cell infiltration and growth, while controlling degradation rates to prevent premature disintegration.
Implementation Method 1
the adhesive component comprises a polymer having a lower melting temperature (Tm) than the material layer and the two or more polymer fibre layers
Implementation Method 2
bonding through fibre entanglement and chemical bonds
Implementation Method 3
the adhesive component between the polymer fibre layers is porous and comprises a layer of electrospun fibres that are substantially arranged in a grid pattern
Data Source
Figure 1A~1I
Figure 2
Figure 3
AI summary
A scaffold for tissue repair or wound dressing comprising: a material layer;a polymer fibre layer; and an adhesive component between the material layer and the polymer fibre layer, wherein the adhesive component comprises material having a lower melting temperature (Tm) than the material layer and the polymer fibre layer.