Vertebral Osteosynthesis Connecting Bar with Captive Lug
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Solution Overview
Problem
Existing vertebral osteosynthesis equipment is complex and time-consuming to implant, particularly for short vertebral column segments, with risks of connecting parts escaping and pivoting, leading to imperfect correction and loosening of nuts.
Innovation Solution
The equipment features a connecting bar with a protruding lug and a longitudinal slot in the connecting part, allowing the part to pivot and become 'captive' once engaged, eliminating escape risks and enabling easy assembly with an eyelet and intermediate portion for precise vertebral alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional side loading connecting parts are used with short connecting bars, then the equipment can be used for vertebral osteosynthesis, but the risk of connecting parts escaping from the bar increases
Solution Approach 1:
The connecting part is designed with an engagement duct that receives and captures the connecting bar, creating a nested configuration where the bar is contained within the duct structure. This nesting arrangement prevents the bar from escaping laterally, directly resolving the reliability issue with short bars.
Solution Approach 2:
The engagement duct is positioned laterally offset from the assembly duct, creating a three-dimensional arrangement where the bar must traverse through multiple spatial dimensions and angular orientations to be properly engaged. This dimensional complexity prevents accidental escape by requiring precise alignment in multiple directions.
2Stability of the object's composition
If traditional side loading connecting parts are used, then the equipment can connect anchoring members, but pivoting of the connecting bar relative to the anchoring members occurs during tightening
Solution Approach 1:
The connecting bar is pre-configured with specific angular orientations and engagement geometries that predeterminedly constrain its position relative to the anchoring members. The engagement duct and bar are designed with complementary shapes that automatically maintain correct angular positioning during the tightening operation, preventing pivoting before it can occur.
3Productivity
If traditional assembly methods are used for short vertebral column segments, then the procedure can be performed, but the implantation time increases due to complexity
Solution Approach 1:
The assembly duct and engagement duct are merged into a single integrated connecting part structure, eliminating the need for separate alignment and engagement operations. This consolidation reduces the number of discrete steps required during implantation, directly improving productivity while maintaining the necessary functional complexity through intelligent design integration.
Data Source
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AI summary
This equipment (1) comprises at least one connecting bar (3) having an assembly portion (11), at least two anchoring members (2) and at least one connecting part (4, 5) of the so-called "side loading" type. According to the invention, -said assembly portion (11) comprises at least one protruding lug (13) situated on the side of one of its ends, and -said connecting part (4) has a longitudinal slot emerging in said engagement duct, sized to receive said lug (13) in an adjusted manner, but with the lug (13) being able to slide therein, said connecting part (4) being able to be engaged on said assembly portion (11) beyond that lug (13).