Branched-Sheet Particles for Soft Tissue Volume Reconstruction
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Solution Overview
Problem
Current methods for manufacturing implantable soft tissue engineering materials face challenges in adjusting the hardness and elasticity of particles for volume reconstruction, as existing processes either result in materials that are too soft to sustain a three-dimensional volume or too hard to integrate with soft tissues, leading to inflammatory reactions or fibrosis.
Innovation Solution
The development of branched-sheet particles that can absorb fluids to expand, featuring channel-like conduits and protrusions for bio-integration, allowing for controlled volume expansion and maintaining shape stability within the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If particles are made from pre-existing tissues or frozen material, then manufacturing process is simplified, but hardness and elasticity cannot be adjusted to sustain three-dimensional volume
Solution Approach 1:
The patent changes the physical and chemical parameters of the particle material by using a specific polymer composition (polyester with specific molecular weight and crystallinity) and controlling manufacturing parameters (temperature, pressure, composition ratios) to achieve both ease of manufacture and appropriate mechanical properties for volume reconstruction
Solution Approach 2:
The patent employs composite material structures combining polyester polymers with specific physical properties and porous matrix materials to create particles that are both easy to manufacture and have adjustable hardness and elasticity for sustaining three-dimensional volume
2Stability of the object's composition
If particles are made too hard to integrate with soft tissues, then structural stability is improved, but inflammatory reactions and fibrosis occur
Solution Approach 1:
The patent adjusts the mechanical parameters of the particles by controlling polyester molecular weight, crystallinity degree, and composition ratios to achieve optimal hardness and elasticity that match soft tissues, thereby maintaining structural stability while avoiding inflammatory reactions and fibrosis
Solution Approach 2:
The patent creates particles with non-uniform properties including varying porosity (30-80%), different polymer crystallinity regions, and heterogeneous composition to achieve local quality variations that promote tissue integration while maintaining overall structural stability
3Object-affected harmful factors
If particles are made too soft to sustain three-dimensional volume, then tissue integration is improved, but particles cannot maintain shape and migrate
Solution Approach 1:
The patent optimizes particle parameters including porosity (30-80%), polymer crystallinity (30-70%), and composition ratios to achieve the right balance between softness for tissue integration and hardness for shape stability and migration prevention
Solution Approach 2:
The patent creates particles with spatially varying properties including different porosity levels, crystallinity gradients, and compositional heterogeneity to achieve local softness for integration while maintaining overall shape stability
4Productivity
If conventional manufacturing methods are used, then production speed is maintained, but manufacturing precision of particle properties cannot be controlled
Solution Approach 1:
The patent implements precise control of manufacturing parameters including temperature profiles, pressure conditions, composition ratios, and processing times to achieve high manufacturing precision of particle properties while maintaining efficient production speeds
Solution Approach 2:
The patent incorporates quality control feedback mechanisms to monitor and adjust manufacturing parameters in real-time to ensure consistent particle properties while maintaining productivity
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 particles enable gentle and rapid deployment in vivo, facilitating better tissue integration, vascularization, and stability of the implanted material, while avoiding migration and inflammatory reactions, and can fill defects of various sizes, including those larger than 50 cm3.
Implementation Method 1
The particle is capable of increasing the size of its conduits by fluid uptake
Implementation Method 2
cross-linking the pre-cooled mixture at a temperature below 0° C., preferably below minus 1° C.
Data Source
AI summary
The particle (1) is suitable for the manufacture of an implantable soft tissue engineering material and comprises a three-dimensionally warped and branched sheet (2) where:(i) the three-dimensionally warped and branched sheet (2) is made from a biocompatible material having a Young's modulus of 1 kPa to 1 GPa;(ii) the three-dimensionally warped and branched sheet (2) has an irregular shape which is encompassed in a virtual three-dimensional envelope (3) having a volume VE;(iii) the three-dimensionally warped and branched sheet (2) has a mean sheet thickness T;(iv) the three-dimensionally warped and branched sheet (2) has a volume VS;(v) the particle (1) has a Young's modulus of 100 Pa to 15 kPa; and(vi) the particle (1) further comprises a number of protrusions (4) where the three-dimensionally warped and branched sheet (2) reaches the envelope (3);(vii) the particle (1) has a number of interconnected channel-type conduits (5) defined by the branching of the sheet (2) and/or by voids in the sheet (2); and(viii) where the conduits (5) have (a) a mean diameter DC; and (b) an anisotropicity index of 1.01 to 5.00.