Intervertebral Fusion Implant Guide Rails for Migration Prevention
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Solution Overview
Problem
Existing intervertebral body fusion implant devices face challenges in maintaining accurate initial placement and long-term positioning between adjacent vertebrae during interbody fusion, leading to potential instability and migration.
Innovation Solution
The intervertebral body fusion implant device features guide rails extending from bone engaging portions, which create a track on the vertebrae endplates to prevent migration and ensure precise placement and fixation, combined with a bone gripping structure to limit relative movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional intervertebral body fusion implant devices are used, then the device can be placed between adjacent vertebrae, but the device cannot maintain accurate positioning and may migrate during the fusion process
Solution Approach 1:
The guide rails are pre-formed on the implant device body before insertion. These guide rails create tracks on the vertebral endplates during initial placement, establishing a predetermined path that prevents subsequent migration of the device. The bone gripping structures are also pre-configured to engage with the vertebral bodies, providing immediate stabilization upon placement.
Solution Approach 2:
The guide rails act as an intermediary element between the implant device and the vertebral endplates. By creating tracks on the endplates, the guide rails mediate the interaction between the device and bone, ensuring the device follows a precise placement path and remains stable during the fusion process without direct complex mechanical interlocking.
2Reliability
If bone gripping structures are added to limit relative movement, then positioning stability improves, but device complexity increases
Solution Approach 1:
The bone engagement function is segmented into two distinct components: guide rails for creating placement tracks and bone gripping structures for limiting relative movement. This segmentation allows each component to perform its specific function efficiently without interfering with the other, providing stable fixation while maintaining a relatively simple overall device structure.
Solution Approach 2:
The bone gripping structures are positioned asymmetrically on the implant device body, with different configurations on opposite sides. This asymmetric arrangement allows the device to engage with the vertebral bodies in a way that maximizes stability while accommodating natural anatomical variations, providing reliable fixation without requiring complex symmetric mechanisms.
Data Source
AI summary
An intervertebral body fusion implant device configured for being engaged between two adjacent vertebrae comprises an implant device body having an upper bone engaging portion and a lower bone engaging portion, a plurality of protrusions extending from each one of the upper and lower bone engaging portions, and a guide rail extending from each one of the bone engaging portions. A passage extends between the upper bone engaging portion and the lower bone engaging portion. The guide rail of each one of the bone engaging portions extends beyond a tip portion of each one of the protrusions thereof. Each one of the guide rails extends substantially parallel with each other one of the guide rails.