Self-Fixating Prosthesis With Microtextured Grips for Tissue Repair
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Solution Overview
Problem
Existing implantable prostheses for soft tissue and muscle wall defects often require provisional fixation methods like suturing or stapling, which can be cumbersome and may cause additional tissue damage, and they may not adequately conform to the anatomical shape of the defect.
Innovation Solution
An implantable prosthesis with a biologically compatible repair fabric integrated with grip segments, featuring microtextured surfaces and perforations, allowing for self-gripping and tissue integration without the need for provisional fixation, and a preformed 3D configuration to fit anatomical shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If provisional fixation methods (suturing, stapling) are used to anchor the prosthesis, then the prosthesis can be securely positioned, but additional tissue damage occurs and the procedure becomes cumbersome
Solution Approach 1:
The prosthesis incorporates self-gripping features through microtextured surfaces and grip segments that enable the device to anchor itself to tissue without external fixation tools. The microtextured patterns create mechanical interlocking with tissue fibers, allowing the prosthesis to secure its own position while minimizing the need for additional sutures or staples that would cause further tissue trauma.
Solution Approach 2:
The prosthesis utilizes porous or mesh-like structures with controlled pore sizes that facilitate tissue ingrowth while providing grip segments with microtextured surfaces. These porous regions allow tissue to penetrate and integrate with the prosthesis, creating a secure anchor that eliminates the need for provisional fixation methods and reduces tissue damage from suturing or stapling.
2Ease of manufacture
If a flat prosthesis is used, then manufacturing is simpler, but it does not conform to the anatomical shape of the defect
Solution Approach 1:
The prosthesis is designed with preformed three-dimensional curved configurations that match the anatomical contours of the defect region. The grip segments and microtextured surfaces are molded into curved geometries that conform to the natural anatomy, providing both optimal positioning and secure grip without requiring complex post-manufacturing shaping or customization.
Solution Approach 2:
The prosthesis is divided into multiple grip segments distributed across its surface, each capable of independently conforming to local anatomical variations. This segmentation allows the overall structure to adapt to complex three-dimensional anatomical shapes while maintaining manufacturing simplicity through modular design and standardized segment production.
3Reliability
If grip segments with complex microstructures are added to the prosthesis, then self-gripping capability is achieved, but device complexity increases
Solution Approach 1:
The microtextured grip segments utilize controlled variations in surface parameters such as pillar height, spacing, and diameter to achieve effective self-gripping. By optimizing these geometric parameters within specific ranges, the prosthesis achieves reliable tissue anchoring through simple micro pillar structures rather than complex mechanical features, maintaining manufacturing feasibility while providing adequate grip strength.
Data Source
AI summary
An implantable prosthesis for repairing tissue defects includes a layer of repair fabric and a plurality of microtextured grip segments mounted to the repair fabric. The grip segments include perforations on a tissue facing surface to promote tissue ingrowth.