Spinal Cage Deployable Spin-Plate Fixation
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Solution Overview
Problem
Current spinal cages for spinal fusion often require additional fixation methods to prevent movement, which can complicate surgical procedures and affect the stability of the fusion process.
Innovation Solution
A spinal cage design featuring a circumferentially closed wall with a deployable spin-plate that can be rotated and locked, allowing for adjustable positioning and fixation without the need for separate fixation devices, and a kit including the spinal cage, spin-plate, and bone screws for various surgical approaches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional fixation methods (separate plates) are used to prevent spinal cage movement, then fixation reliability is improved, but device complexity and surgical procedure complexity increase
Solution Approach 1:
The patent combines the spinal cage and spin-plate into a single integrated device. The spin-plate is positioned within the spinal cage and can be rotated to engage with the vertebral body, providing fixation functionality without requiring separate fixation plates. This merging eliminates the need for multiple separate components while maintaining reliable fixation.
Solution Approach 2:
The spinal cage is designed to perform multiple functions: it provides structural support for spinal fusion and simultaneously houses the deployable spin-plate mechanism for fixation. The spin-plate itself serves dual purposes by providing both structural support and active fixation through its rotation and engagement capabilities.
2Reliability
If additional fixation methods (separate plates) are used to prevent spinal cage movement, then fixation reliability is improved, but surgical procedure complexity increases
Solution Approach 1:
The spin-plate is pre-positioned within the spinal cage during manufacturing, ready for deployment. During surgery, the spin-plate is simply rotated into its engaged position rather than requiring separate attachment steps. This preliminary preparation simplifies the surgical procedure while ensuring reliable fixation is achieved.
Solution Approach 2:
The spin-plate transitions from a retracted state during implantation to an engaged state through rotation. This dynamic deployment allows the device to be easily inserted in a compact form and then activated intraoperatively to provide fixation, reducing surgical complexity while maintaining reliability.
3Reliability
If fixed positioning structures are used to prevent spinal cage movement, then fixation reliability is improved, but adaptability for different surgical approaches is reduced
Solution Approach 1:
The spin-plate can be rotated to different angular positions and engaged at various orientations, allowing adaptation to different surgical approaches and patient anatomies. The deployable nature of the spin-plate enables it to be positioned optimally regardless of the surgical access route used.
Solution Approach 2:
The spin-plate engagement parameters (rotation angle, depth of engagement, orientation) can be adjusted intraoperatively to match different surgical approaches and vertebral anatomies. This parametric adjustability maintains fixation reliability across various surgical scenarios.
Data Source
AI summary
A spinal cage with a wall extending in a longitudinal direction defining an interior space is disclosed. There is also provided a deployable element in movable relation to the spinal cage.