Spinal Cage Modular Anchoring for Limited-Space Stability
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Solution Overview
Problem
Traditional ALIF cages are ineffective in reducing or eliminating migration and anterior expulsion, particularly in cases with limited space, and existing designs are costly and complex.
Innovation Solution
A modular anchoring adapter system that engages with existing ALIF cages, featuring adjustable anchoring components such as posts, keels, and scallops to secure the cage in place, reducing movement and simplifying surgical kits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ALIF cages are used with screw fixation, then the cage can be secured to the vertebrae, but the design is ineffective in reducing migration and anterior expulsion particularly in cases with limited space
Solution Approach 1:
The fixation system is divided into modular components: the ALIF cage itself, separate anchoring adapters with posts, and fixation screws. This segmentation allows the components to be assembled in different configurations to accommodate varying anatomical constraints, particularly in limited space scenarios where a monolithic design would fail.
Solution Approach 2:
The system employs adjustable and adaptable fixation configurations rather than a fixed design. The modular anchoring adapters can be positioned and configured dynamically based on the specific anatomical conditions of each patient, allowing the system to adapt to limited space while maintaining reliable cage stabilization.
2Reliability
If a full plate with additional insertion tools and fixation screws is used, then the anterior face of the vertebrate can be coupled, but the plate does not engage with the implanted ALIF design and the system becomes more complex and costly
Solution Approach 1:
The anchoring adapter merges the functions of the plate and the cage into a single integrated component. The adapter attaches to the anterior face of the vertebrae while simultaneously engaging the ALIF cage, eliminating the need for separate plates and reducing overall system complexity.
Solution Approach 2:
The modular anchoring adapter serves multiple functions: it couples the ALIF cage to the vertebral body, provides fixation screw attachment points, and ensures stable anchoring. This multi-functionality replaces the need for separate specialized tools and components, simplifying the overall system.
3Reliability
If traditional fixation methods are used, then the cage can be anchored, but the surgical kit becomes more costly and complex
Solution Approach 1:
The surgical kit is organized into modular segments: the ALIF cage, anchoring adapters, fixation screws, and insertion tools. This segmentation allows for a streamlined kit composition that includes only the necessary components for effective anchoring, reducing overall complexity and cost compared to traditional comprehensive plate systems.
Data Source
AI summary
The invention relates to a modular anchoring adaptor that engages with existing features of commercially available ALIF cages to help eliminate migration and/or anterior expulsion cause by the instability of the spine, such as lordosis. Such modular adaptor will mate or engage with existing features to enhance anchoring within the vertebral disc space, which space is limited and a low-profile should be maintained.