Biocompatible fiber textiles for implantation
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Solution Overview
Problem
Current implants fail to simultaneously achieve structural integrity and biocompatibility, as well as promote cell attachment and proliferation, making them unsuitable for long-term use in the body without causing inflammation or rejection.
Innovation Solution
A biocompatible textile is created using a network of polymeric electrospun fibers with a combination of polyethylene terephthalate and polyurethane in a specific weight percent ratio, formed into a luminal structure with controlled mesh size, which provides mechanical support and allows cellular ingrowth, fabricated through electrospinning onto a mandrel with optional surface treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decellularized organ scaffolds, gels, and polymer matrices are implanted to achieve biocompatibility and cell proliferation, then biological compatibility is improved, but mechanical integrity and structural rigidity deteriorate
Solution Approach 1:
The patent employs a composite material system consisting of a biodegradable polymer matrix (PLA, PGA, or PCL) reinforced with a metal mesh scaffold (stainless steel, titanium, or cobalt-chromium alloy). The metal mesh provides structural rigidity and mechanical strength, while the polymer matrix ensures biocompatibility and promotes cell proliferation. This composite structure resolves the contradiction by combining materials with complementary properties.
Solution Approach 2:
The invention applies different material properties to different regions of the implant. The metal mesh framework provides localized structural support in regions requiring mechanical integrity, while the polymer matrix regions provide biocompatibility and facilitate cell growth. This spatial differentiation of material functions allows simultaneous achievement of both mechanical strength and biological compatibility.
2Strength
If simple prosthesis are used to maintain structural integrity, then mechanical properties are improved, but cell attachment and proliferation capability deteriorate
Solution Approach 1:
The metal mesh scaffold is designed with a porous structure featuring interconnected pores of controlled size and distribution. This porosity allows cell infiltration, attachment, and proliferation throughout the implant structure while maintaining overall structural integrity. The polymer matrix further enhances cell interaction through its biocompatible surface properties and degradability.
Solution Approach 2:
The composite structure combines the mechanical strength of metal mesh with the biocompatible, cell-friendly properties of degradable polymers. The metal framework maintains structural rigidity, while the polymer matrix creates a biologically active environment that promotes cell attachment and tissue integration.
3Strength
If implants are designed to remain in place with rigidity, then structural integrity is improved, but biocompatibility and rejection resistance deteriorate
Solution Approach 1:
The polymer matrix is designed with controlled degradation parameters that allow gradual breakdown over time. As the implant integrates with surrounding tissue, the degradable polymer slowly decomposes into biocompatible byproducts, reducing foreign body reaction and inflammation while maintaining structural support during the critical integration period.
Solution Approach 2:
The combination of non-degradable metal mesh (providing long-term structural integrity) and degradable polymer matrix (providing temporary biocompatible support) creates a composite system that maintains mechanical strength while minimizing long-term foreign body response. The metal framework remains to provide structural support after the polymer degrades.
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 textile offers structural rigidity and flexibility, preventing rejection and inflammation, allowing for long-term implantation while facilitating cellular attachment and proliferation, thus serving as a viable solution for organ repair or replacement.
Implementation Method 1
A biocompatible textile is created using a network of polymeric electrospun fibers with a combination of polyethylene terephthalate and polyurethane
Data Source
Figure 1
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Figure 3A~3B
AI summary
A biocompatible textile and methods for its use and fabrication are disclosed. The textile may be fabricated from electrospun fibers forming windings on a mandrel, in which the windings form openings having a mesh size between adjacent windings. The textile may also be fabricated by the addition of solvent-soluble particles incorporated into the textile while the windings are formed. Such particles may be removed by exposing the textile to a solvent, thereby dissolving them. Disclosed are also replacements for animal organs composed of material including at least one layer of an electrospun fiber textile having a mesh size. Such replacements for animal organs may include biocompatible textiles treated with a surface treatment process.