Composite Implant with Interconnecting Bands for Bone Regeneration
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Solution Overview
Problem
Current biomaterials for bone and cartilage reconstruction, such as fibre reinforced composites and bioactive ceramics, face issues with insufficient mechanical strength, weak attachment to load-bearing materials, and the risk of particles dislodging before placement, along with contamination risks and interference with medical imaging.
Innovation Solution
A biologically compatible composite comprising a structural part, a porous part, and interconnecting parts made of polymer or filled polymer bands that connect the structural and porous parts, enhancing mechanical properties and secure particle integration, allowing for stem cell seeding and improved tissue integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If porous material is used for stem cell seeding, then tissue integration is improved, but mechanical strength is reduced
Solution Approach 1:
The implant is divided into two distinct parts: a porous part for tissue integration and stem cell seeding, and a dense structural part for mechanical strength. This segmentation allows each part to optimize its specific function without compromising the other.
Solution Approach 2:
The patent combines the porous part and dense structural part into a single integrated implant structure, merging the benefits of tissue integration and mechanical strength support in one device.
2Adaptability or versatility
If particles are added to enhance osteoconductivity, then bone growth is improved, but particles may get loose and disappear before placement
Solution Approach 1:
Particles are added to the polymer matrix during the manufacturing process before the implant is finalized, ensuring they are securely embedded and will not loosen or disappear during handling or placement surgery.
3Strength
If metal implants are used for structural support, then mechanical strength is improved, but stress shielding and bone atrophy occur
Solution Approach 1:
The patent changes the material parameters by using a polymer-based composite instead of metal, adjusting the mechanical properties to provide support while allowing physiological stress transmission to prevent bone atrophy.
4Strength
If metal implants are used, then mechanical strength is improved, but interference with MRI occurs
Solution Approach 1:
The patent changes the material composition from metal to polymer-based composite, fundamentally altering the magnetic properties to eliminate MRI interference while maintaining mechanical strength through composite structure design.
5Adaptability or versatility
If allografts are used for bone replacement, then tissue compatibility is improved, but risk of transmittable diseases increases
Solution Approach 1:
The patent uses a synthetic polymer-based implant that does not require biological donation, eliminating the risk of transmittable diseases while providing sufficient functionality for bone replacement and regeneration.
Data Source
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AI summary
The present invention relates to a composite comprising a structural part, a porous part, and at least two interconnecting parts arranged at a distance from each other and extending from the structural part to the porous part, thus connecting them to each other. The implant is characterised in that each interconnecting part is in the form of a band having a length, a width and a height, the width and the height both being independently at most 20 % of the length of the band, and in that at least one of the interconnecting parts is at least partially embedded into the structural and porous parts.