Intervertebral Disc Prosthesis for Annulus Defect Repair
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Solution Overview
Problem
Current surgical methods for repairing herniated or traumatized intervertebral discs do not effectively close defects in the disc annulus, leading to incomplete repair and potential ongoing pain and nerve impingement.
Innovation Solution
A method and system for repairing imperfections in spinal discs using a prosthesis with anchoring devices that span the defect, applying circumferential force to maintain or increase disc height and keep nucleus material within the disc, utilizing a deployment device to position and secure the prosthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current surgical methods are used to repair herniated discs, then the nucleus pulposus can be removed, but the disc annulus defects cannot be effectively closed
Solution Approach 1:
The prosthesis is divided into multiple segments including first and second anchoring portions at opposite ends and a central portion, allowing each segment to perform specific functions (anchoring, spanning, and closing the defect) while working together as a unified repair system
Solution Approach 2:
The prosthesis acts as an intermediary device that bridges the disc annulus defect, providing mechanical support and closure while allowing biological healing to occur, thus mediating between the damaged tissue and the desired repaired state
2Reliability
If a prosthesis with anchoring devices is inserted to span the defect, then the disc annulus can be closed, but the device complexity increases
Solution Approach 1:
The single prosthesis structure performs multiple functions simultaneously: the anchoring portions secure the device to the disc, the central portion spans the defect, and the integrated design provides both mechanical closure and structural support, eliminating the need for multiple separate devices
Solution Approach 2:
The prosthesis components are nested within each other during deployment, with the central portion positioned between the anchoring portions, creating a compact integrated structure that simplifies insertion while maintaining functional complexity
3Stability of the object's composition
If the prosthesis is designed to apply circumferential force to maintain disc height, then the disc structure is stabilized, but the manufacturing precision requirements increase
Solution Approach 1:
The prosthesis is designed with specific geometric parameters including arcuate shape and predetermined dimensions that enable it to apply circumferential force when inserted, transforming the physical state of the disc by maintaining height through controlled mechanical interaction
Solution Approach 2:
The central portion of the prosthesis has an arcuate shape that conforms to the natural curvature of the disc annulus, allowing it to distribute forces evenly and maintain disc height through geometric compatibility rather than requiring precision machining of flat surfaces
Data Source
AI summary
A repair system including a closure prosthesis and deployment device, and associated methods for repairing any imperfection including a flaw, hole, tear, bulge, or, in some cases, a deliberate cut or incision in any tissue including an intervertebral disc. The prosthesis has first and second side portions with a connecting central portion, and is designed to span an imperfection with opposite ends positioned on opposite sides of the imperfection. The prosthesis may include anchoring features including barbs and/or members that extend transversely. The deployment device can include a cannula for positioning the prosthesis near the imperfection, and, in some cases, a mechanism that may cause the two sides of the prosthesis to be deployed in a specific order.