Spinal Construct Mating Elements for Vertebral Manipulation
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Solution Overview
Problem
Current spinal correction technologies face challenges in effectively manipulating and stabilizing vertebrae during surgical procedures, particularly in addressing angular and fixed kyphotic deformities, as they often lead to issues like screw plow, bone fracture, and inadequate load distribution.
Innovation Solution
A spinal construct system comprising a first and second member engageable with fasteners, connected by a longitudinal element, and equipped with mating elements for surgical instruments, allowing for resistance or prevention of movement, facilitating efficient manipulation and stabilization of vertebrae through compression, distraction, and load distribution across multiple bone screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spinal constructs are manipulated with surgical instruments for compression and distraction of vertebrae, then correction of spinal deformities is achieved, but screw plow and bone fracture complications occur
Solution Approach 1:
The spinal construct is divided into multiple members (first member, second member, etc.) that can be independently engaged with different fasteners. This segmentation allows distributed load application across multiple attachment points, reducing stress concentration that causes screw plow and bone fracture while maintaining effective correction capability.
Solution Approach 2:
Different members of the spinal construct are engageable with different fasteners having shafts fixed with tissue in specific locations. This local differentiation allows optimized load distribution at each attachment point according to the specific anatomical and mechanical requirements, preventing harmful effects while achieving correction.
2Stability of the object's composition
If spinal constructs are used for stabilization of treated section of spine, then mobility is improved, but load distribution becomes inadequate
Solution Approach 1:
The spinal construct comprises multiple members that can be engaged with multiple fasteners distributed along the treated section of the spine. This segmentation enables load to be distributed across multiple attachment points rather than concentrated at single points, providing both stabilization and adequate load distribution.
Solution Approach 2:
Multiple members and fasteners are combined into an integrated spinal construct system that works together to provide both stabilization and load distribution. The longitudinal element connects the members, creating a unified structure that distributes loads effectively while maintaining spinal stability.
3Ease of operation
If receivers are allowed to move relative to shafts during manipulation, then ease of operation is improved, but control precision deteriorates
Solution Approach 1:
The connection between receivers and shafts is designed to be dynamically controllable. During manipulation, the receivers can move relative to the shafts to some extent, allowing ease of operation. However, the mating elements can be engaged with surgical instruments to resist or prevent movement when precise control is required, providing dynamic adaptability between flexibility and precision.
Solution Approach 2:
Mating elements act as intermediaries between the receivers and surgical instruments. These mating elements allow the surgical instruments to manipulate the tissue while controlling the relative movement between receivers and shafts, enabling both ease of operation and precision control as needed during the procedure.
Data Source
AI summary
A spinal construct comprises a first member engageable with a receiver of a first fastener having a shaft fixed with tissue. A second member is engageable with a receiver of a second fastener having a shaft fixed with the tissue. A longitudinal element connects the members. At least one of the members includes a mating element that is releasably engageable with a surgical instrument to manipulate the tissue such that movement of the receivers relative to the shafts is resisted and/or prevented. Surgical instruments, implants, systems and methods are disclosed.