Modular Spinal Implant Ring Keyway Interchangeable Heads
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Solution Overview
Problem
Current spinal implant systems for treating spinal disorders lack versatility and stability, particularly in providing multi-axial and uni-axial screw functionality with a single bone fastener, which limits their ability to effectively address various spinal pathologies and alignment issues.
Innovation Solution
A modular spinal implant system featuring a universal pedicle bone screw with a ring and keyway design that allows for interchangeable heads and shafts, enabling both multi-axial and uni-axial screw functionality depending on the selected configuration, thereby providing enhanced stability and adaptability for different spinal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single bone fastener design is used, then device complexity is reduced, but adaptability to different spinal pathologies and surgical approaches is limited
Solution Approach 1:
The bone fastener is divided into separable components: a shaft portion and a head portion that can be independently selected and combined. This segmentation allows for multiple configuration options (multi-axial and uni-axial screws) while maintaining a relatively simple base design for each component.
Solution Approach 2:
The bone fastener system is designed to perform multiple functions through interchangeable components. The same shaft can be paired with different heads to achieve different screw types (multi-axial or uni-axial), making a single fastener design adaptable to various spinal pathologies and surgical approaches.
2Adaptability or versatility
If multiple bone fastener types are provided, then adaptability to different spinal conditions is improved, but device complexity and inventory requirements increase
Solution Approach 1:
The system uses universal components where a single shaft design can be combined with multiple head designs to create different screw types. This allows one bone fastener family to serve multiple functions (multi-axial and uni-axial screw functionality) without requiring entirely separate fastener designs for each application.
Solution Approach 2:
The bone fastener system allows dynamic reconfiguration during surgery by enabling the surgeon to select and interchange different head portions on the same shaft based on the specific surgical needs and spinal anatomy, providing flexibility without requiring multiple dedicated fastener types.
Data Source
AI summary
A spinal implant system comprises a plurality of alternate first members. Each of the first members includes an inner surface defining an implant cavity. A second member is configured to penetrate tissue and includes a mating element engageable with a first member such that the second member is interchangeable with the plurality of first members. A first member is selected for connection with the second member to comprise a bone fastener having a selected movement. Fasteners, instruments and methods are disclosed.