3D Cell Culture Scaffold with Interconnected Pores for Uniform Seeding
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Solution Overview
Problem
Existing bioreactors face challenges in uniformly seeding cells throughout three-dimensional scaffolds and ensuring efficient mass transfer to cells in central scaffold regions, particularly in deep or thick structures, which limits their ability to simulate in vivo nutrient delivery and waste removal effectively.
Innovation Solution
A continuous culture device featuring a matrix of interconnected growth surfaces with a fluid distribution system analyzed using Computational Fluid Dynamics, ensuring uniform flow and metabolite distribution, and a biocompatible scaffold structure that allows for optimal spacing and shape to prevent diffusion limitations and cell toxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells are seeded in 3D scaffolds for tissue engineering, then implantable tissue structures can be generated, but uniform and efficient seeding of cells throughout the scaffold pores becomes difficult
Solution Approach 1:
The patent employs porous scaffolds with controlled pore sizes and interconnected structures to enable uniform cell distribution. The porous architecture allows cells to penetrate and colonize throughout the scaffold volume, addressing the seeding uniformity challenge while maintaining structural integrity for implantation.
Solution Approach 2:
The invention utilizes fluid flow systems to deliver cells through the scaffold structure. By controlling fluid dynamics, the system achieves uniform cell distribution throughout the porous network, solving the seeding efficiency problem without requiring complex manual seeding procedures.
2Quantity of substance
If 3D cultures are performed in deep or thick scaffold structures, then more cells can be cultured, but mass transfer to cells in the central scaffold part becomes limited
Solution Approach 1:
The scaffold is divided into multiple zones or segments with optimized pore structures. This segmentation allows different regions to be tailored for specific functions, ensuring that even central regions receive adequate nutrient supply and waste removal while maintaining high cell culture capacity.
Solution Approach 2:
The invention introduces additional flow dimensions by implementing multi-directional fluid delivery systems. Rather than relying on simple diffusion, the system creates convective flow patterns that penetrate deep into the scaffold, ensuring mass transfer efficiency throughout the entire 3D structure.
3Productivity
If known bioreactors are used for high density cell culture, then cell production increases, but flow irregularities occur that prevent effective nutrient delivery and waste removal
Solution Approach 1:
The bioreactor system incorporates sensors and control mechanisms that monitor flow distribution and nutrient consumption in real-time. This feedback allows dynamic adjustment of flow rates and patterns to maintain uniform distribution even at high cell densities, preventing flow irregularities while sustaining high productivity.
Solution Approach 2:
The system employs dynamic flow control where fluid delivery parameters are continuously adjusted based on culture progression. This dynamic adaptation ensures optimal flow distribution throughout the culture period, maintaining reliability as cell density increases and metabolic demands change.
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 device enables efficient cultivation of cells in deep structures by ensuring uniform nutrient delivery and waste removal, maintaining cell viability and preventing inflammatory reactions, as demonstrated by successful cell growth and integration in animal models without tissue inflammation.
Implementation Method 1
The spacing and definition are arranged to permit directional flow through and around the growth surfaces uniformly
Implementation Method 2
the biocompatible scaffold structure that allows for optimal spacing and shape to prevent diffusion limitations
Data Source
AI summary
A continuous device for culturing mammalian cells in a three-dimensional structure for the transplantation or implantation in vivo is described. The culturing device comprises (a) a scaffold formed by a matrix of interconnected growth surfaces spaced at regular intervals and (b) a fluid distribution means at the inlet and the exit of the growth areas. The device is particularly useful for culturing bone cells for dental implants or bone reconstruction.