Aligned Nanofiber Dural Patch for Guided Tissue Regeneration
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Solution Overview
Problem
Existing dural substitutes, such as xenogenic materials, pose risks of adhesions, contractures, disease transmission, and high costs, while synthetic alternatives lack directional cues for effective cell migration and regeneration.
Innovation Solution
Development of electrospun nanofiber scaffolds with aligned fibers, produced using a novel electrospinning method, that provide directional cues for cell migration and promote rapid tissue regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If xenogenic dural substitutes are used, then dural repair can be achieved, but the incidence of adhesions and contractures increases
Solution Approach 1:
The patent changes the material parameters by using autologous patient cells instead of xenogenic materials, and controls the physical structure through electrospinning parameters to create aligned nanofibers. This resolves the contradiction by eliminating immunogenicity while maintaining structural integrity for dural repair
Solution Approach 2:
The patent creates a composite structure combining aligned nanofibers with patient-specific cells, forming a hybrid construct that provides both structural support and biological functionality. This composite approach eliminates the harmful effects of xenogenic materials while preserving dural repair effectiveness
2Reliability
If processed collagenous grafts are used, then dural repair can be achieved, but the cost increases significantly
Solution Approach 1:
The patent uses inexpensive electrospun nanofiber scaffolds that can be disposed of after single use, replacing expensive processed collagenous grafts. The scaffolds provide sufficient functionality for dural repair without requiring the costly processing and handling of premium biological materials
Solution Approach 2:
The patent employs autologous patient cells that self-organize and differentiate on the nanofiber scaffold without requiring complex processing or specialized instrumentation. This self-service approach eliminates the need for expensive cell processing equipment and reduces overall procedure costs
3Ease of operation
If conventional cell microarray techniques are used, then cell delivery can be achieved, but the process becomes costly and time consuming
Solution Approach 1:
The patent replaces complex mechanical cell delivery systems with an electrostatic field-based electrospinning process. The electric field naturally guides and deposits cells onto the nanofiber scaffold, eliminating the need for sophisticated mechanical instrumentation and reducing production time
Solution Approach 2:
The patent prepares the nanofiber scaffold with aligned fibers before cell deposition, creating a pre-configured structure that guides cell migration and organization. This preliminary structuring eliminates the need for time-consuming post-deposition manipulation and accelerates the overall cell delivery process
4Ease of manufacture
If random fiber orientation is used in scaffolds, then manufacturing is simpler, but cell migration and tissue regeneration are less effective
Solution Approach 1:
The patent introduces dynamic control of fiber orientation during the electrospinning process by manipulating electric field parameters. The collector electrode configuration and voltage settings can be adjusted to produce aligned fibers, providing dynamic control over scaffold architecture to enhance cell migration while maintaining manufacturing flexibility
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 aligned nanofiber scaffolds enhance cell migration and population, reducing healing time and eliminating disease transmission risks, while being cost-effective and customizable.
Implementation Method 1
a first electrode is surrounded by a second electrode. The first electrode and the second electrode are electrically charged to different polarities. A spinneret is positioned within the first electrode and is electrically charged to a polarity opposite the polarity of the second electrode. The spinneret dispenses a polymer that forms a plurality of fibers extending from the spinneret to the second electrode in a radial pattern
Data Source
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AI summary
A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.