Ionic Crosslinked Collagen Bioactive Glass Composite
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Solution Overview
Problem
Existing methods for crosslinking collagen to enhance mechanical attributes in wounded tissue or bone defects often introduce toxins or require non-sterile conditions, which can be challenging to manage.
Innovation Solution
An ionically cross-linked collagen-bioactive glass composite is prepared by mixing collagen fibers with bioactive glass, followed by freeze-drying and immersion in divalent or polyvalent metal ion solutions, allowing for cross-linking without the need for toxic agents or non-sterile processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional crosslinking methods (UV light, chemical crosslinkers) are used to enhance collagen mechanical attributes, then crosslinking efficiency is improved, but toxicity and loss of sterility occur
Solution Approach 1:
The patent changes the crosslinking mechanism from chemical/UV-based to ionic crosslinking using divalent metal cations. This parameter change in the crosslinking method eliminates toxic chemical agents and maintains sterility while achieving collagen crosslinking for enhanced mechanical properties
Solution Approach 2:
The patent introduces divalent metal cations (such as Ca2+, Mg2+) as intermediary crosslinking agents that bridge collagen molecules without requiring toxic chemical crosslinkers. These metal cations serve as safe intermediaries that provide the necessary crosslinking function while maintaining biocompatibility and sterility
2Reliability
If bioactive glass is used to provide structural support and induce osteogenesis, then bone regeneration is improved, but the complexity of the composite material increases
Solution Approach 1:
The patent creates a composite material combining collagen and bioactive glass where the collagen provides structural framework and the bioactive glass induces osteogenesis. This composite approach leverages the complementary properties of both materials to enhance bone regeneration while managing the complexity through synergistic interaction
3Strength
If collagen is crosslinked to enhance mechanical strength for tissue repair, then structural support is improved, but the risk of introducing toxins increases
Solution Approach 1:
The patent employs a freeze-drying process that enables the collagen-bioactive glass composite to self-assemble and crosslink in a controlled manner. The freeze-drying conditions facilitate ionic crosslinking without requiring external toxic agents, allowing the material to achieve its structural support function through its own composition and processing
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
This method effectively cross-links collagen while maintaining sterility, enhancing mechanical properties and facilitating healthy bone growth without introducing toxins, as demonstrated by increased compressive and tensile strengths in the composite materials.
Implementation Method 1
the collagen fibers are cross-linked by divalent metal cations in the ion-containing solution or by divalent metal cations that are release from the bioactive glass in the presence of water
Implementation Method 2
freeze-drying the paste to form a composite comprising 60 wt.%) to 90 wt.%) of bioactive glass
Data Source
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AI summary
Compositions including crosslinked collagen and bioactive glass having an average pore size of at least 100 microns and methods of preparation thereof.