Soft Tissue Implant with Localized Pore Structure
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Solution Overview
Problem
Current soft tissue implants fail to simultaneously achieve anti-adhesion on the visceral side, controlled integration with the abdominal wall on the parietal side, prevent shrinkage and wrinkling, and ensure strength and elasticity, while also minimizing the risk of infection and tissue rejection.
Innovation Solution
A multi-purpose implant with a surface structure that can be either smooth or textured, formed from an elastic polymer film and a reinforcement element, where the surface structure is controlled to prevent tissue adhesion and promote integration, and the physical properties are achieved through the geometry of the reinforcement element without altering the polymer's chemical composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a porous structure with small pores is used to ensure tissue integration, then tissue integration is improved, but bacteria can form colonies in the pores causing infection risk
Solution Approach 1:
The implant surface features locally differentiated pore sizes: larger pores (75 μm or more) in specific regions to prevent bacterial colonization, while other areas maintain appropriate porosity for tissue integration. This spatial variation in pore quality allows simultaneous achievement of tissue integration and infection prevention.
Solution Approach 2:
The implant utilizes controlled porous structures with specifically engineered pore size distributions. The porous material design ensures that pores are sufficiently large (≥75 μm) to prevent bacterial colony formation while maintaining adequate porosity for tissue ingrowth and integration.
2Strength
If a synthetic mesh is used to ensure strength and elasticity, then mechanical strength is improved, but tissue shrinkage and wrinkling occur in the distant post-operation period
Solution Approach 1:
The implant combines synthetic mesh components for mechanical strength with biocompatible materials that resist tissue shrinkage. This composite structure integrates the advantages of both material types: the synthetic portion provides necessary tensile strength and elasticity, while the biocompatible component prevents dimensional instability and wrinkling over time.
Solution Approach 2:
The implant design modifies physical parameters such as mesh architecture, fiber diameter, and material composition to achieve optimal balance between strength and dimensional stability. By adjusting these parameters, the implant maintains mechanical integrity while resisting tissue shrinkage forces in the long term.
3Object-affected harmful factors
If an anti-adhesive barrier layer is used to prevent visceral adhesion, then anti-adhesion is improved, but tissue response and integration control become compromised
Solution Approach 1:
The implant features spatially differentiated surface properties: one side maintains anti-adhesive characteristics to prevent visceral adhesion, while the other side provides controlled porosity and surface characteristics for reliable tissue integration. This local quality differentiation allows both functions to coexist without compromising either.
4Object-affected harmful factors
If the implant surface is made smooth to prevent adhesion, then anti-adhesion is improved, but tissue integration and secure fixation are compromised
Solution Approach 1:
The implant surface exhibits local quality variation with smooth regions providing anti-adhesive properties and textured or porous regions providing mechanical interlocking for strong tissue fixation. This spatial differentiation allows the implant to simultaneously prevent unwanted adhesion and achieve secure anchoring.
Data Source
AI summary
Embodiments of a multi-purpose implant for use in surgery, such as for reconstruction of soft tissues, are disclosed. In some embodiments, the implant includes elastic polymer film made from a suitable biologically compatible polymer. The implant also includes a reinforcement element formed from a polyurethane mesh or other strong and stable woven or unwoven synthetic material. The reinforcement element can be fully enclosed by the film so that only the film comes into contact with the organs and tissues. Anti-adhesive properties or control over implant's integration into a body can be determined by the preset surface structure of the implant, while physical and mechanical properties, such as strength and elasticity of the implant, are obtained by virtue of reinforcement element geometry.