Paraxial Revision Rod-to-Rod Connector for Spinal Fusion
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Solution Overview
Problem
Current spinal fusion surgery methods face challenges in revising existing pedicle or lateral mass screw constructs, particularly in connecting differently sized spinal rods across multiple spinal regions, which complicates procedures and requires difficult removal and reimplantation of rods.
Innovation Solution
A rod-to-rod connector system that allows for easy connection of two differently sized spinal rods, featuring a rotatable design with set screws and an L-shaped channel for secure fixation, enabling flexible orientation and alignment of rods, and can be used in revision procedures and multi-level fusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional spinal fusion revision procedures are used to connect differently sized rods across multiple spinal regions, then existing constructs can be revised, but the procedure becomes complex and requires difficult removal and reimplantation of rods
Solution Approach 1:
The rod-to-rod connector serves as an intermediary device that connects two differently sized spinal rods without requiring removal of existing rods. The connector includes a first portion that receives a first spinal rod and a second portion that receives a second spinal rod, enabling connection between rods of different sizes and configurations while maintaining the existing construct
Solution Approach 2:
The connector is divided into separate functional portions: a first connector portion for receiving the first spinal rod, a second connector portion for receiving the second spinal rod, and a rotatable coupling mechanism. This segmentation allows each portion to be optimized for its specific function and enables flexible connection of differently sized rods
2Adaptability or versatility
If traditional spinal fusion revision procedures are used to connect differently sized rods across multiple spinal regions, then existing constructs can be revised, but rod removal and reimplantation becomes difficult
Solution Approach 1:
The rod-to-rod connector serves as an intermediary device that connects two differently sized spinal rods without requiring removal of existing rods. The connector includes a first portion that receives a first spinal rod and a second portion that receives a second spinal rod, enabling connection between rods of different sizes and configurations while maintaining the existing construct
Solution Approach 2:
The connector includes a rotatable coupling mechanism that allows dynamic adjustment of the angle between the two rod portions. The second connector portion can rotate relative to the first connector portion, enabling the system to adapt to different spatial configurations and rod orientations during revision procedures
3Adaptability or versatility
If differently sized pedicle or lateral mass screws are used to fuse vertebral bodies at different spinal regions, then multiple spinal regions can be fused, but linking the screws with a single spinal rod becomes difficult
Solution Approach 1:
The rod-to-rod connector is designed with universal adaptability to connect rods of different sizes, shapes, and orientations. The first and second connector portions can each receive different types of spinal rods, and the rotatable coupling mechanism allows the connector to accommodate various spatial configurations, making it a multi-functional solution for connecting screws at different spinal regions
Data Source
AI summary
Disclosed herein are an orthopedic rod-to-rod connector and rod-to-rod connector assemblies for spinal fusion surgery. The rod-to-rod connector may include a first connector portion and a second connector portion. The first connector portion may have a first aperture configured to receive at least a portion of a bone-engaging screw and a first spinal rod. The second connector portion may be rotatably connected with the first connector portion and may include a second aperture to receive a second spinal rod. The second connector portion may be L-shaped and may include a set screw to control rotation of the first connector portion with respect to the second connector portion.