Scaffold-Stretching System With Grooved Silicone Chamber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current uniaxial mechanical loading systems for three-dimensional cellular scaffolds face challenges such as low mechanical integrity, stress concentration, and non-homogenous stress distribution, particularly when clamping gel-based scaffolds, and there is a need for efficient cosmetic skin care product testing platforms that can handle a high volume of formulations.
Innovation Solution
A scaffold-stretching system with a stretchable loading chamber and mechanical loading system that applies cyclic and static uniaxial tensile mechanical loading, mimicking in vivo environments, using a silicone-based chamber with a groove design for secure scaffold holding and a driving mechanism for precise strain application, and a method for testing cosmetic products by culturing human skin substitutes under controlled mechanical loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If clamping is used to apply stretch to gel-based scaffolds, then mechanical loading can be applied, but the scaffold can disintegrate and stress concentration occurs at the ends
Solution Approach 1:
The patent introduces intermediate clamps with distributed gripping surfaces that mediate between the loading system and the scaffold. These clamps distribute the gripping force across multiple contact points along the scaffold length, preventing stress concentration at single clamping points while maintaining effective mechanical loading transmission.
Solution Approach 2:
The patent employs flexible clamping mechanisms that can conform to the scaffold surface, distributing pressure evenly. The flexible nature of the clamps allows them to adapt to the gel-based scaffold's compliance without creating localized stress points that would cause disintegration.
2Force
If direct clamping is used to hold the scaffold, then mechanical loading can be applied, but non-homogenous stress distribution occurs within the scaffold
Solution Approach 1:
The clamping system is segmented into multiple independent clamping elements distributed along the scaffold. This segmentation allows the loading force to be distributed across multiple contact points, creating a more uniform stress distribution throughout the scaffold volume rather than concentrating stress at a single location.
Solution Approach 2:
Intermediate clamping structures serve as mediators that transform the point-load application into a distributed load. These intermediaries include support ribs, distributed grippers, or flexible membranes that spread the mechanical loading across the scaffold surface, ensuring homogeneous stress distribution.
3Productivity
If more cosmetic formulations are tested, then product development efficiency improves, but current testing platform limitations restrict the number of formulations that can be tested
Solution Approach 1:
The testing platform is designed with universal, interchangeable test chambers that can accommodate different scaffold sizes and configurations. This multi-functionality allows a single platform to test multiple cosmetic formulations simultaneously on various skin model types, dramatically increasing throughput without proportionally increasing device complexity.
Solution Approach 2:
The platform employs a nested modular architecture where smaller test chambers can be nested within a larger framework, or multiple chambers can be stacked/arranged in space-efficient configurations. This allows high-density arrangement of test units, maximizing the number of formulations that can be tested simultaneously within a compact device footprint.
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 system effectively maintains scaffold integrity, achieves homogenous strain distribution, and accelerates cosmetic product development by providing a reliable, scalable platform for testing cosmetic products, reducing product development cycles and improving testing efficiency.
Implementation Method 1
The stretchable loading chamber comprises silicone and is configured to support a scaffold material and a supply of cells
Data Source
AI summary
A scaffold-stretching system includes at least one stretchable loading chamber configured to support a scaffold material and a supply of cells, such as human skin substitute cells, and is configured to allow for cultivation of a cellular three-dimensional scaffold; and a mechanical loading system is configured for application of cyclic and static uniaxial tensile mechanical loading on the cellular three-dimensional scaffold, and is configured to mimic the in vivo environment of musculoskeletal, cardiovascular, and other tissues that experience uniaxial strains.