Multi-Layered Collagen Scaffold With Anisotropic Pores
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Solution Overview
Problem
Current medical materials for implants and tissue engineering fail to replicate the natural environment of cells effectively, leading to limited cell integration and functionality, particularly in cartilage and bone tissue repair, due to their simplistic structure and composition.
Innovation Solution
A multi-layered material with anisotropic pores is produced using a process involving a temperature gradient to create layers with distinct compositions and structures, mimicking the natural extracellular matrix, allowing for better cell migration and integration by replicating the complex biological environment of tissues like cartilage and bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a freezing process with finger-shaped ice crystals is used to structure collagen type I dispersion, then a homogeneous and targeted distribution of collagen fibres in channel-like guiding structures is achieved, but the material can reproduce the natural environment of cells only to a limited extent because it consists exclusively of one single functional component
Solution Approach 1:
The patent combines multiple different collagen types (collagen type I, collagen type II, and collagen type III) in a single scaffold structure to create a composite material that better reproduces the natural extracellular matrix environment, thereby improving cell compatibility and functionality while maintaining the structured fibre distribution achieved through the freezing process
2Adaptability or versatility
If multiple collagen scaffolds of different composition are combined to form an overall structure representing different bone or cartilage layers, then the structure attempts to reproduce natural tissue zones, but cell migration into the inside of the scaffold is limited and the centre remains substantially acellular
Solution Approach 1:
The patent applies local quality by assigning different collagen compositions to specific zones within the scaffold (collagen type I for subchondral bone, collagen type II for cartilage layers, collagen type III for transitional zones) to match the natural composition gradient of osteochondral tissue, thereby promoting cell migration and integration throughout the entire structure including the centre
3Ease of manufacture
If individual collagen scaffolds are crosslinked separately and bonded using a weaving process, then the scaffolds form an overall structure, but the structure allows only limited population by cells and complete integration after implantation is not possible
Solution Approach 1:
The patent merges multiple collagen types into a single integrated scaffold structure with continuous anisotropic pores that extend throughout all layers, eliminating the need for separate crosslinking and bonding processes. This unified structure provides consistent mechanical properties and promotes complete cell infiltration and integration into the native tissue
4Ease of manufacture
If a porous structure with large porosities and unnatural alignment is used, then the scaffold can be manufactured, but fibrous chondral tissue is formed instead of native articular chondral tissue
Solution Approach 1:
The patent changes the pore structure parameters from large, randomly aligned porosities to smaller, anisotropically aligned pores that extend continuously through the scaffold layers. This parameter change in pore size, shape, and orientation guides cell behavior and promotes the formation of native articular chondral tissue with appropriate collagen type II composition and structure
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 multi-layered material enables efficient cell migration and integration, promoting tissue repair and regeneration by replicating the natural tissue structure and composition, enhancing the stability and functionality of the material within the body.
Implementation Method 1
subliming the sublimable compounds of the adjacent first and second layers to form a monolithic support matrix of the first and second layers having pores generated by the subliming
Data Source
AI summary
The present invention relates to a monolithic multi-layered material having at least a first layer, from which anisotropic pores originate, and a second layer, in which the anisotropic pores continue. The present invention further relates to a monolithic medical material having at least a first layer, from which anisotropic pores originate, and a second layer, in which the anisotropic pores continue. The present invention further relates to a process for the production of a multi-layered material having anisotropic pores. It further relates to a multi-layered material which can be produced by the process according to the invention.