Tissue Ingrowth Anchoring via Remodelable Matrix
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Solution Overview
Problem
Current methods for anchoring graft materials to bodily structures are inadequate, as they often rely on mechanical devices or adhesives, which may not provide long-term stability and tissue integration, particularly in applications like stents and prosthetic valves.
Innovation Solution
A medical device comprising a persistent material body with openings for tissue ingrowth, where a tissue ingrowth material promotes cellular invasion and anchoring, allowing new tissue growth to secure the graft to the bodily structure, using biocompatible materials like synthetic polymers and remodelable extracellular matrix materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical devices or adhesives are used for anchoring graft materials, then initial fixation is achieved, but long-term stability and tissue integration are insufficient
Solution Approach 1:
The graft material is divided into distinct functional zones: a first graft component for initial mechanical anchoring and a second graft component with enhanced tissue ingrowth properties. This segmentation allows each zone to perform its specialized function optimally, resolving the contradiction between initial fixation and long-term integration.
Solution Approach 2:
The first graft component is designed to provide preliminary mechanical anchoring and stabilization during the critical early healing period. This preliminary action protects the graft while biological integration occurs, addressing the need for both immediate fixation and long-term stability.
2Reliability
If remodelable extracellular matrix material is used for tissue ingrowth, then tissue integration is enhanced, but structural persistence may be reduced
Solution Approach 1:
Different regions of the graft are assigned different material properties: the first graft component uses persistent material for structural stability, while the second graft component uses remodelable extracellular matrix material at the tissue interface to maximize cellular ingrowth and integration. This local differentiation resolves the contradiction between persistence and integration.
Solution Approach 2:
The graft comprises a composite structure combining persistent synthetic or natural materials with remodelable extracellular matrix materials. This composite approach allows the persistent component to maintain structural integrity while the remodelable component facilitates tissue integration, simultaneously achieving both goals.
3Reliability
If graft materials are designed to promote cellular invasion, then tissue ingrowth is improved, but mechanical strength may be compromised
Solution Approach 1:
The second graft component is specifically engineered with local quality characteristics that promote cellular invasion and tissue ingrowth at the tissue-implant interface, while the first graft component maintains overall structural strength. This spatial differentiation of material properties resolves the contradiction between tissue ingrowth promotion and mechanical strength maintenance.
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 achieves stable anchoring of graft materials to bodily structures through tissue integration, overcoming mechanical forces and providing a durable, biocompatible solution for tissue repair and augmentation.
Implementation Method 1
tissue ingrowth material that is configured for receiving tissue ingrowth from the bodily structure wall effective to anchor the graft structure to the bodily structure wall
Data Source
AI summary
Described, in certain aspects, are medical devices that can be used to anchor graft materials to bodily structures. These devices comprise an implantable graft structure and tissue ingrowth material. This implantable graft structure is comprised of a body of persistent material having a first face and one or more openings defined therein, wherein the persistent material body first face is configured for opposing a bodily structure wall upon implantation. This tissue ingrowth material is positioned at the one or more persistent material body openings, and is configured for receiving tissue ingrowth from the bodily structure wall effective to anchor the graft structure to the bodily structure wall. The invention also provides methods utilizing these and other inventive medical devices, for example, to anchor graft materials to vascular vessel walls and/or other bodily structures.