Double-Structured Tissue Implant for Cartilage Repair
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Solution Overview
Problem
Current tissue implants for cartilage defects lack stability, ease of manipulation, and prolonged shelf-life, with uncontrolled porosity and uneven pore distribution leading to instability and difficulty in handling during surgery.
Innovation Solution
A double-structured tissue implant comprising a primary scaffold with vertically oriented, homogeneously sized pores and a secondary scaffold generated within the primary scaffold using a collagen solution and non-ionic surfactant, processed through precipitation, lyophilization, and dehydrothermal treatment, providing enhanced stability and wetting properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a porous collagen matrix is used as a tissue implant, then it provides structural support for tissue regeneration, but it exhibits uncontrolled porosity and uneven pore distribution leading to instability and difficulty in handling
Solution Approach 1:
The implant is divided into two distinct scaffolds: a primary scaffold providing structural support and a secondary scaffold within the pores providing additional stability. This segmentation allows each scaffold to be optimized independently for its specific function, resolving the contradiction between structural support and porosity control.
Solution Approach 2:
The invention uses a composite structure combining primary and secondary scaffolds made from collagen and polysaccharide materials. This composite approach enables precise control over porosity and mechanical properties while maintaining structural support, directly addressing the manufacturing precision issue.
2Ease of operation
If collagen-based substrates are used for tissue engineering, then they provide biocompatible structural support, but they shrink or swell and are difficult to manipulate during surgery
Solution Approach 1:
The dual-scaffold design creates a dynamic balance where the primary and secondary scaffolds work together to maintain dimensional stability. The interlocking structure prevents unwanted shrinking or swelling while preserving the flexibility needed for surgical manipulation.
3Reliability
If the pore structure of the implant is increased to facilitate cell migration, then cell infiltration is improved, but the structural integrity and stability of the implant is compromised
Solution Approach 1:
The secondary scaffold is positioned specifically within the pores of the primary scaffold, creating local reinforcement in critical areas. This local quality approach maintains overall porosity for cell migration while providing localized structural support where needed.
4Area of stationary object
If a single-scaffold structure is used, then the implant is simpler in design, but it provides insufficient surface area for cell adhesion without compromising porosity
Solution Approach 1:
The secondary scaffold is nested within the pores of the primary scaffold, creating a double-structured configuration. This nesting dramatically increases the available surface area for cell adhesion while maintaining the overall compact structure and porosity of the implant.
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 double-structured implant offers improved stability, resistance to shrinkage and dissolution, extended shelf-life, and increased surface area for cell adhesion and growth, facilitating easier surgical delivery and manipulation while maintaining porosity for cell migration and nutrient exchange.
Implementation Method 1
introducing a composition comprising a soluble collagen solution in combination with a non-ionic surfactant into the pores of the primary scaffold and solidifying said composition within said pores using a novel process of the invention comprising at least precipitation
Implementation Method 2
processed through precipitation, lyophilization and dehydrothermal treatment
Implementation Method 3
processed through precipitation, lyophilization and dehydrothermal treatment
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A double-structured tissue implant and a method for preparation and use thereof for implantation into tissue defects. The double-structured tissue implant comprising a primary scaffold and a secondary scaffold consisting of a soluble collagen solution in combination with a non-ionic surfactant generated and positioned within the primary scaffold. A stand alone secondary scaffold implant or unit. A process for preparation of the double-structured implant or the stand alone secondary scaffold comprising lyophilization and dehydrothermal treatment.