Multi-directional Spinal Stabilization via Oblique Trans-axial Constructs
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Solution Overview
Problem
Current spinal stabilization systems lack adaptability for various stabilization requirements in a single spinal procedure, limiting their effectiveness in providing dynamic fixation and motion preservation across different spinal segments.
Innovation Solution
A multi-directional spinal stabilization system is developed, featuring trans-axial stabilization constructs with flexible bodies that extend between anchors on adjacent vertebrae, allowing for oblique orientations and sliding mechanisms to maintain tension and limit distraction and compression, while enabling motion preservation and dynamic stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid fixation systems are used to stabilize spinal column segments, then spinal stability is improved, but motion preservation and adaptability to various stabilization requirements deteriorate
Solution Approach 1:
The stabilization system is divided into multiple independent components: anchors, stabilization constructs, and connection elements. Each component can be selectively configured and positioned to address specific stabilization needs at different spinal segments, allowing the system to adapt to various stabilization requirements while maintaining overall spinal stability
Solution Approach 2:
The stabilization constructs incorporate dynamic elements such as flexible rods and adjustable connection mechanisms that allow controlled motion at the spinal segment level. This enables the system to preserve physiological motion while providing necessary stabilization, resolving the contradiction between rigidity and motion preservation
2Adaptability or versatility
If multi-directional stabilization constructs are implemented, then adaptability and motion preservation are improved, but device complexity increases
Solution Approach 1:
The stabilization constructs are designed with universal components that can perform multiple functions. The same anchor and construct configuration can provide stabilization in multiple directions and adapt to different spinal pathologies, reducing the need for multiple specialized devices and thereby managing complexity while enhancing adaptability
Solution Approach 2:
The system employs asymmetric anchor placements and oblique construct orientations that naturally provide multi-directional stabilization. This asymmetric configuration allows the system to address complex spinal instability patterns without requiring additional symmetric components, managing complexity while achieving adaptability
3Adaptability or versatility
If trans-axial stabilization constructs with sliding mechanisms are used, then motion preservation and tension maintenance are improved, but manufacturing precision requirements increase
Solution Approach 1:
The stabilization constructs utilize flexible rod elements that can bend and adapt to spinal curvature while maintaining tension. This flexibility compensates for minor variations in manufacturing precision and allows the constructs to conform to the natural anatomy, achieving motion preservation without requiring extremely tight manufacturing tolerances
Solution Approach 2:
The sliding mechanisms are designed with inherent compliance that allows for dynamic adjustment during implantation and patient movement. This dynamic design tolerates reasonable manufacturing variations while maintaining the desired motion preservation and tension maintenance functions
Data Source
AI summary
Systems and methods for multi-directional stabilization of a spinal column segment are provided. The systems include one or more motion preserving constructs that are engaged to adjacent vertebrae and extend trans-axially between the vertebrae obliquely to the central axis of the spinal column. The systems permit motion of at least a portion of a vertebral level while providing stabilization at least when tensioned. Systems that provide stabilization in compression are also contemplated.