Vertebral Spacer With Integrated Compression And Locking Fasteners
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Solution Overview
Problem
Existing spinal spacer devices fail to securely connect adjacent vertebrae while applying a predetermined amount of compression, lacking the capability to effectively stabilize the spine and address spinal disorders.
Innovation Solution
A vertebral spacer with strategically positioned bores and fasteners that apply both compression and locking forces between vertebrae, utilizing bone-engaging and body-engaging threads to secure the spacer in place, allowing for adjustable angles and orientations to accommodate individual anatomy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing spinal spacer devices are used, then the device structure is simple, but the device cannot apply predetermined compression force between vertebrae
Solution Approach 1:
The patent combines multiple fastener functions into a single integrated system. The fastener includes both compression application features and locking features, merging what would traditionally be separate components into one unified device that can both apply and maintain compression force between vertebrae
Solution Approach 2:
The fastener is designed with multi-functionality, serving as both a compression applicator and a locking mechanism. The same fastener component performs multiple functions: applying compression through its engagement with the spacer and vertebrae, and simultaneously locking to maintain that compression force, eliminating the need for separate compression and locking devices
2Reliability
If existing spinal spacer devices are used, then the device is easy to manufacture, but the device cannot securely connect adjacent vertebrae
Solution Approach 1:
The device is segmented into distinct functional zones within the fastener: a compression application zone that contacts the vertebrae to apply force, and a locking zone that secures the compression. The spacer body is also segmented with multiple bores positioned at different orientations, allowing independent optimization of each component for its specific function while maintaining overall manufacturability
3Strength
If existing spinal spacer devices are used, then the device structure is simple, but the device cannot apply locking force between vertebrae
Solution Approach 1:
The fastener merges compression application and locking functions into a single integrated component. The same fastener structure that applies compression through its engagement with the spacer and vertebrae also provides locking through its threaded engagement, eliminating the need for separate compression screws and locking screws
4Adaptability or versatility
If existing spinal spacer devices are used, then the device lacks adjustability, but the device cannot accommodate individual anatomy
Solution Approach 1:
The spacer features local quality variations through its bore configuration. Different bores are positioned at different orientations and locations on the spacer body, allowing fasteners to be engaged at specific angles that match the patient's anatomy. This localized adaptation at each bore location enables the device to accommodate individual anatomical variations without requiring complete redesign
Data Source
AI summary
A vertebral spacer includes a body having a top side, a bottom side, a front side, and a rear side. The top side is configured to be positioned adjacent to a first vertebra and the bottom side is configured to be positioned against a second vertebra. First, second, third and fourth bores extend through the body. First and second compression fasteners disposable in the first and third bores, and first and second locking fasteners disposable in the second and fourth bores. The first compression fastener and the first locking fastener cooperate to apply and lock a first predetermined compression force between the body and the first vertebra. The second compression fastener and the second locking fastener cooperate to apply and lock a second predetermined compression force between the body and the second vertebra.