Biocompatible Scaffold With Tunable Porosity
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Solution Overview
Problem
Current regenerative medicine devices for tissue regeneration face limitations and deficiencies, particularly in achieving tunable porosity and effective delivery of bio-active molecules, which are not adequately addressed by existing technologies.
Innovation Solution
A biocompatible scaffold with tunable porosity is created using a 3D structure composed of multiple layered materials, where one layer comprises bone particles and another layer consists of dissolvable polymers and solid particulates, allowing for adjustable porosity by dissolving the particulates with a solvent, enabling the delivery of bio-active molecules and facilitating tissue regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional clinical products (autografts, allografts, xenografts) are used for tissue regeneration, then tissue regeneration can be achieved, but obstacles and failures occur due to limited availability, immunogenicity, and disease transmission risks
Solution Approach 1:
The patent uses biodegradable polymers that temporarily serve as scaffolds for tissue regeneration and then degrade naturally in the body, eliminating the need for permanent implants and reducing long-term complications. The scaffold is designed to be temporary but highly effective during the regeneration period.
Solution Approach 2:
The invention combines biodegradable polymers with bioactive molecules and growth factors to create a composite scaffold that provides both structural support and biological functionality, overcoming the limitations of single-material approaches used in traditional grafts.
2Ease of manufacture
If artificial regenerative medicine devices are designed with fixed structures, then manufacturing is simplified, but tunable porosity and effective delivery of bio-active molecules cannot be achieved
Solution Approach 1:
The scaffold structure is designed to be dynamically adjustable through control of polymer molecular weight, crosslinking density, and degradation rate, allowing the same base material to produce scaffolds with different porosity levels and degradation timelines suited for various tissue regeneration applications.
Solution Approach 2:
The invention enables control of scaffold porosity and degradation properties by adjusting key parameters such as polymer concentration, crosslinking agent ratio, and processing conditions, transforming a fixed manufacturing process into a tunable system that delivers bioactive molecules at controlled rates.
3Reliability
If scaffold porosity is increased to enable bio-active molecule delivery, then tissue regeneration efficacy improves, but structural strength and stability of the scaffold deteriorate
Solution Approach 1:
The scaffold is designed with spatially varying porosity and mechanical properties, with higher density and strength in load-bearing regions and higher porosity in regions requiring nutrient diffusion and cell infiltration, allowing simultaneous optimization of both structural integrity and biological functionality.
Solution Approach 2:
The combination of biodegradable polymer matrix with reinforcing bioactive molecules and growth factors creates a composite structure where the polymer provides mechanical support while the bioactive components enhance tissue regeneration, allowing porosity optimization without complete sacrifice of structural integrity.
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 scaffold achieves tunable porosity and effective delivery of bio-active molecules, enhancing tissue regeneration by allowing for customizable pore sizes and concentrations, thereby improving the efficacy of tissue repair and regeneration processes.
Implementation Method 1
the second layer comprises dissolvable polymers and solid particulates, allowing for adjustable porosity by dissolving the particulates with a solvent
Implementation Method 2
enabling the delivery of bio-active molecules and facilitating tissue regeneration
Data Source
AI summary
A biocompatible structure includes a scaffold obtained from a 3D structure. The 3D structure includes base layered structures, each of which includes at least a first layer and a second layer surrounded by the first layer. The first layer includes at least one of first, second and third media. The second layer includes at least another of the first, second and third media. The first medium comprises bone particles. The second medium comprises a polymer dissolvable in a first solvent. The third medium comprises solid particulates dissolvable in a second solvent different than the first solvent. The 3D structure is treated with the second solvent to dissolve the solid particulates so as to form pores at positions of the solid particulates therein, thereby resulting in the scaffold having a porosity adjustable by sizes of the solid particulates and concentration of the solid particulates in the 3D structure.