Dual Screw Sacral Plate for Spinal Fixation
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Solution Overview
Problem
Current surgical methods for treating spinal disorders, such as scoliosis and degenerative disc disease, face challenges in providing stable fixation and alignment of spinal implants, often requiring complex procedures and multiple steps, which can increase operating time and radiation exposure during fluoroscope guidance.
Innovation Solution
A spinal implant system featuring a dual screw sacral plate with a surgical instrument, such as an awl guide, that facilitates precise alignment and insertion of multi-axial fasteners and alar nails, reducing cross-threading and allowing for efficient implantation of components in a single body position, thereby simplifying the surgical process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex surgical procedures are used for spinal implant fixation, then stable fixation is achieved, but operating time and radiation exposure increase
Solution Approach 1:
The sacral plate is divided into multiple cavities (first cavity for multi-axial fastener, second cavity for alar fastener) that can be independently prepared and implanted. This segmentation allows each fastener to be inserted through its own dedicated pathway, simplifying the overall procedure while maintaining stable fixation of the sacrum and spinal constructs
Solution Approach 2:
The sacral plate serves as an intermediary device that connects and stabilizes multiple spinal components (multi-axial fasteners and alar fasteners) to the sacrum. By providing a centralized platform with pre-defined cavities, the plate mediates the fixation process and reduces the complexity of directly securing multiple fasteners without such a coordinating structure
2Manufacturing precision
If multiple surgical steps are used for implant alignment, then precise alignment is achieved, but procedural complexity increases
Solution Approach 1:
The sacral plate is pre-configured with cavities oriented at specific angles (e.g., 45 degrees) relative to each other before implantation. These pre-established orientations guide the insertion of multi-axial and alar fasteners, eliminating the need for complex intraoperative alignment maneuvers and reducing procedural complexity while maintaining precise angular relationships
Solution Approach 2:
The sacral plate replicates the required angular geometry of fastener orientations in its cavity design. By copying the desired spatial relationships (e.g., 45-degree angles between fasteners) directly into the plate's structure, the device provides built-in alignment guidance that simplifies the surgical procedure while ensuring precise final positioning
Data Source
AI summary
A spinal implant system comprises a plate including a surface that defines a first cavity and a second cavity. The first cavity is oriented to implant a multi-axial fastener with a sacrum. The second cavity is oriented to implant a fastener with an ala of a sacrum. A surgical instrument is engageable with the plate. At least one of the plate and the surgical instrument includes an engagement surface for connection therebetween. Systems and methods of use are disclosed.