Magnetic Intervertebral Disc Replacement Wear Reduction
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Solution Overview
Problem
Current intervertebral disc replacement devices face issues such as failure to maintain stable attachment to vertebrae, loosening of interfaces, excessive wear, and wear debris generation, which can lead to adverse tissue reactions and treatment failure.
Innovation Solution
The use of intervertebral disc replacement devices featuring superior and inferior plates with embedded magnets that generate a magnetic force to maintain separation and stability, reducing wear and wear debris by eliminating contact between plates or using articulating surfaces with magnets to stabilize the disc replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional articulating surfaces are used in disc replacement devices, then the device can provide range of motion, but excessive wear and wear debris generation occur
Solution Approach 1:
The patent replaces traditional mechanical articulating surfaces with a magnetic field-based levitation system. Magnets embedded in the superior and inferior plates generate magnetic repulsion forces that levitate one plate relative to the other, eliminating mechanical contact. This substitution of mechanical contact with magnetic field interaction resolves the wear and debris generation problem while maintaining range of motion through magnetic force-mediated movement.
Solution Approach 2:
The magnetic field acts as an intermediary between the superior and inferior plates, transmitting force without requiring direct physical contact. The magnetic repulsion force mediates the interaction between plates, allowing them to maintain separation and move relative to each other without mechanical contact, thereby eliminating wear and debris generation.
2Reliability
If plates are allowed to contact each other for stability, then attachment stability is improved, but wear and interface loosening increase
Solution Approach 1:
The patent replaces mechanical contact-based stability with magnetic field-based stabilization. Magnets embedded in both plates generate continuous magnetic repulsion forces that maintain plate separation and stability without physical contact. This eliminates the wear and interface loosening problems associated with traditional contacting articulating surfaces while preserving attachment stability through magnetic force.
Solution Approach 2:
The magnetic repulsion force acts as a pre-established protective barrier between the plates, preventing direct contact before it can occur. The magnetic field continuously exerts a repulsive force that cushions the plates against each other, eliminating mechanical contact and the associated wear and interface loosening that would otherwise occur during normal operation.
3Loss of substance
If magnetic force is used to maintain plate separation, then wear is reduced, but device complexity increases
Solution Approach 1:
The patent merges the structural plate components with magnetic functionality by embedding magnets directly within the superior and inferior plates. This integration combines the mechanical support function of the plates with the magnetic force generation function, eliminating the need for separate magnetic components and reducing overall device complexity despite the introduction of magnetic technology.
Solution Approach 2:
The plates serve multiple functions: they provide structural support, enable range of motion, and generate magnetic repulsion forces for wear-free operation. By embedding magnets within the plates, the patent makes the plates multi-functional, combining mechanical and magnetic capabilities in a single component, thereby reducing the number of separate parts and simplifying the overall device architecture.
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 magnetic force maintains stable attachment and reduces wear and debris, providing a normal range of motion and minimizing adverse tissue reactions, thus addressing the limitations of existing disc replacement technologies.
Implementation Method 1
The magnet(s) in the superior plate and the magnet(s) in the inferior plate are oriented such that a magnetic force exists between the magnet(s) in the superior plate and the magnet(s) in the inferior plate
Data Source
AI summary
An intervertebral disc replacement device comprising a superior plate and an inferior plate, in which each plate contains one or more embedded magnets. The one or more magnets in the superior plate and the one or more magnet in the inferior plate are oriented such that a magnetic force exists between the one or more magnets in the superior plate and the one or more magnet in the inferior plate. In addition, an intervertebral disc replacement device comprising a superior plate and an inferior plate, in which each plate contains one or more embedded magnets, and the plates are designed to form an articulating surface. Further, an intervertebral disc replacement device comprising a superior plate, an inferior plate, and a spacer, in which each plate contains one or more embedded magnets, and the superior and inferior plates are designed to form articulating surfaces with the spacer.