Single Level Spinal Fusion Fastener Assemblies
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Solution Overview
Problem
Current posterior fusion device systems for spinal stabilization are complex, expensive, and not optimized for single level fusion, lacking efficiency in maintaining or re-establishing anatomic spacing within the spine.
Innovation Solution
The development of single level fusion systems comprising fastener assemblies, elongate members, and set screws that allow for precise positioning and secure fixation between vertebrae, enabling the re-establishment of proper spacing and alignment through a series of fasteners and elongate members that can be cannulated for easier insertion and adjustable to accommodate different anatomical needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If posterior fusion device systems are used for spinal stabilization, then spinal stability is improved, but device complexity increases
Solution Approach 1:
The fusion system is divided into separate functional modules: pedicle screws for anchorage, a rod for spinal stabilization, and disc space implants for intervertebral support. Each component can be independently selected and implanted based on specific surgical needs, reducing overall system complexity while maintaining spinal stability.
Solution Approach 2:
The pedicle screws are designed with universal features that allow them to function both as anchorage devices in the vertebrae and as attachment points for the rod. The same screw design can be used across different spinal levels and configurations, simplifying the overall system while ensuring reliable spinal stabilization.
2Reliability
If posterior fusion device systems are used for spinal stabilization, then spinal stability is improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the fusion system into separate components (screws, rod, disc implants), each can be manufactured using optimized processes for its specific function. This allows for economies of scale in producing individual components rather than assembling complex integrated systems, reducing overall manufacturing cost while maintaining spinal stability.
Solution Approach 2:
The system allows for parameter adjustments in component selection (screw diameter, rod length, implant size) to match patient-specific anatomy. This standardization of component designs across different size variations enables more efficient manufacturing processes and inventory management, reducing costs while ensuring proper spinal stabilization.
3Manufacturing precision
If single level fusion is performed with specialized systems, then surgical precision is improved, but device complexity increases
Solution Approach 1:
The system provides surgical precision for single level fusion through specialized components (disc space implants, specific screw configurations) that can be selected from a standardized family of devices. This allows precise control at the surgical level without requiring a completely different complex system, as the same modular components can be configured for single or multi-level procedures.
Data Source
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AI summary
Disclosed herein is A spinal fusion system (1000, 1060, 1100), comprising a first fastener (1010, 1070, 1110) with ahead portion (1020, 1080, 1116); and a second fastener (1030) with a protrusion (1036) for engaging the head portion (1020, 1080, 1116).