Triangular Screw Plate Fusion Cage with Clamping Device
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Solution Overview
Problem
Traditional spinal fusion surgeries involve large screw plates that cause secondary damage and are cumbersome, leading to increased surgical risks and inefficiencies due to complex operation steps and reliance on surgeon skill.
Innovation Solution
A fusion cage with a triangular screw plate and a clamping device that allows for one-step hole drilling and screwing, featuring limiting grooves, a T-shaped or L-shaped clamping block, and a locking screw for stable positioning and reduced plate volume, facilitating easier implantation and alignment with vertebrae surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional screw plate is used for spinal fixation, then the fusion cage can be secured to the vertebrae, but the screw plate occupies excessive space and causes secondary damage to internal body parts
Solution Approach 1:
The screw plate is segmented into a triangular configuration with three corners rather than a traditional large rectangular plate, reducing overall volume while maintaining fixation capability through distributed screw holes at each corner
Solution Approach 2:
The screw plate adopts an asymmetric triangular shape that conforms to the natural curvature and geometry of spinal vertebrae surfaces, allowing better adaptation to the anatomical structure and reducing the need for large plate dimensions
2Productivity
If traditional multi-step internal fixing operations are performed, then the fusion cage can be implanted, but the operation steps are tedious and surgery time is prolonged
Solution Approach 1:
The clamping function and positioning function are merged into a single integrated clamping device that simultaneously performs both operations, eliminating the need for separate clamping and positioning steps and reducing overall surgical complexity
Solution Approach 2:
The clamping device is designed as a multi-functional tool that can clamp the fusion cage, position it accurately, and guide screw insertion, replacing multiple specialized tools with a single universal device
3Reliability
If a fusion cage is clamped by a special tool and implanted, then the fusion cage can be positioned, but the screw plate may become dislocated or deflected during subsequent operations
Solution Approach 1:
The screw plate is pre-hinged to the fusion cage body at a predetermined position, establishing stable positioning before surgical implantation. This preliminary attachment prevents dislocation during subsequent surgical steps while maintaining ease of operation through the hinged design
4Manufacturing precision
If bone screws are screwed in depending on surgeon skill, then fixation can be achieved, but deflection is easily caused and screws cannot be fully sunk into screw holes
Solution Approach 1:
A guide structure acts as an intermediary between the screw and the target bone, providing a predetermined insertion path that ensures accurate positioning. This guide mechanism eliminates reliance on surgeon skill for precise screw placement while preventing deflection and ensuring complete screw insertion
Data Source
AI summary
Disclosed are a fusion cage for a spinal surgery and a clamping device thereof. The fusion cage comprises a fusion cage body (1) and a triangular screw plate (2). A limiting groove (12) fit with the clamping device is provided at a rear end surface of the fusion cage body (1), the fusion cage body (1) is hinged with the screw plate (2), and each of three corners of the screw plate (2) is provided with a screw hole (23). The clamping device comprises two clamping rods (4) which are fit with each other, and a front end of each clamping rod (4) is provided with a clamping head (41), wherein each of face-to-face sides of the clamping heads (41) is provided with a limiting protrusion (42), a front end of each clamping head (41) is capable of being inserted into the limiting groove (12) of the fusion cage body (1), and the limiting protrusion (42) is capable of being clamped at a front side surface of the screw plate (2). The fusion cage and the clamping device can easily fit with each other and are convenient to use, so as to enable the surgical operation to be more convenient, accurate and safe.