Ionically Crosslinked Collagen-Bioactive Glass Composites
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Solution Overview
Problem
Existing methods for crosslinking collagen to enhance mechanical attributes in tissue or bone defects often introduce toxins or require non-sterile conditions, which can be harmful and difficult to manage.
Innovation Solution
A method involving the mixing of collagen with an ion-containing solution and bioactive glass to form a paste, which is then freeze-dried to create a composite, allowing for crosslinking without the need for toxic agents or compromising sterility, using bioactive glass that can bind to both soft and hard tissues and control degradation rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If chemical crosslinkers or UV light are used to crosslink collagen, then mechanical attributes are enhanced, but toxins are introduced that are difficult to remove and sterility is compromised
Solution Approach 1:
The invention changes the crosslinking mechanism from chemical (using crosslinkers) or photochemical (UV light) to physical ion-induced crosslinking. By using divalent or polyvalent metal ions that form ionic bonds with collagen carboxyl groups, the method achieves crosslinking without introducing toxic chemical residues, thus resolving the contradiction between mechanical enhancement and toxin introduction
Solution Approach 2:
The invention introduces metal ions as an intermediary substance to facilitate crosslinking. These ions act as mediators between collagen molecules, forming ionic bridges through electrostatic interactions with carboxyl groups. This intermediary approach enables effective crosslinking while avoiding direct contact with toxic chemical crosslinkers, thereby maintaining sterility and avoiding harmful residues
2Strength
If conventional crosslinking methods are used, then collagen mechanical properties are improved, but the process becomes complex and requires multiple steps
Solution Approach 1:
The invention combines multiple functions into a single step: the metal ions simultaneously serve as crosslinking agents and provide structural support through ionic bonding. This merged approach eliminates the need for separate crosslinking steps, purification steps to remove toxic residues, and complex process controls required by conventional methods, thus simplifying the overall process while achieving the desired mechanical properties
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 crosslinks collagen while maintaining sterility, enhancing mechanical properties and facilitating healthy bone growth without introducing toxins, as demonstrated by increased compressive and tensile strengths in bioactive glass-collagen composites.
Implementation Method 1
The paste is freeze-dried to form a composite
Implementation Method 2
An ion-containing solution is mixed with collagen and a glass to form a paste... The collagen is crosslinked by the glass
Data Source
AI summary
Compositions including crosslinked collagen and bioactive glass having an average pore size of at least 100 microns and methods of preparation thereof.