Multi-Level Spinal Stabilization with Segmented Rods
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Solution Overview
Problem
Current spinal stabilization systems lack adaptability for various stabilization requirements in a single spinal procedure, often requiring different systems for different levels of the spinal column and unable to simultaneously provide motion preservation and prevention.
Innovation Solution
A multi-level, multi-functional spinal stabilization system comprising a flexible motion preserving portion and a rigid motion preventing portion, connected by a linking member, allowing for dynamic stabilization and fusion across multiple vertebral levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single spinal stabilization system is used for multiple vertebral levels, then the system must accommodate both motion preservation and motion prevention requirements, but traditional systems are designed for单一 function (either motion preservation or motion prevention) and cannot simultaneously address both requirements
Solution Approach 1:
The stabilization system is divided into multiple independent rod segments (first rod, second rod, third rod) that can be selectively engaged or disengaged. Each rod segment can provide different stabilization functions (motion preservation or motion prevention) at different vertebral levels, allowing the system to adapt to varying clinical requirements without increasing overall system complexity
Solution Approach 2:
The system employs universal anchoring mechanisms and rod segments that can perform multiple functions. The same basic rod and anchor components can be configured to provide either motion preservation or motion prevention depending on how they are assembled and positioned, eliminating the need for completely different system components for different stabilization needs
2Reliability
If different stabilization systems are used for different vertebral levels, then each level can be optimized for specific stabilization needs, but this requires multiple separate systems and increases procedural complexity
Solution Approach 1:
Multiple rod segments (first rod for motion preservation, second and third rods for motion prevention) are merged into a single integrated stabilization construct. These rod segments connect through shared anchors and linking members to form one cohesive system that can simultaneously provide different types of stabilization at different vertebral levels, reducing the need for multiple separate surgical procedures and implant sets
3Stability of the object's composition
If rigid fixation is applied to preserve motion at a spinal level, then structural stability is achieved, but natural spinal motion is lost; conversely, if flexible fixation is used to preserve motion, then natural motion is maintained, but structural stability is compromised
Solution Approach 1:
Different rod segments with different flexibility characteristics are applied to different local levels of the spine based on specific clinical needs. The first rod may be configured with greater flexibility to preserve motion at levels requiring natural spinal movement, while the second and third rods provide more rigid stabilization at levels requiring structural support. This localized differentiation allows the system to simultaneously maintain both stability and motion capability at appropriate locations
Solution Approach 2:
The system incorporates dynamic elements that allow the rod segments to transition between more rigid and more flexible states. The linking members and anchor configurations enable the construct to adapt its stiffness characteristics in response to loading conditions and healing progression, providing rigid support when needed for stability while allowing controlled motion to preserve natural spinal mechanics
Data Source
AI summary
Systems and methods for multi-level, multi-functional stabilization of a spinal column segment are provided. The systems include one or more constructs having a motion preserving portion that permits motion of at least a portion of a vertebral level and a motion preventing portion that substantially prevents motion of at least a portion of a second, adjacent vertebral level.