Spinal Fusion Implant With Guided Divergent Screw Trajectories
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Solution Overview
Problem
Existing posterior lumbar spinal fusion techniques using pedicle screws are cumbersome, risky, and costly, with a high potential for construct failure due to the large number of parts and prolonged surgical time, especially when addressing spinal deformities like spondylolisthesis.
Innovation Solution
A bone fusion system comprising an insertion guide with angled openings, a locking block, and an implant with divergent screw trajectories, along with a reduction tool, to facilitate precise screw placement and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pedicle screw fusion techniques are used, then spinal stabilization can be achieved, but the large number of parts and prolonged surgical time increase risk, potential for construct failure, and cost
Solution Approach 1:
The patent combines multiple separate components into a single integrated fusion device. The device integrates the body, locking mechanism, and screw trajectories into one unified structure, eliminating the need for multiple separate parts traditionally used in pedicle screw fusion. This merging reduces the number of components while maintaining stabilization functionality.
Solution Approach 2:
The fusion device performs multiple functions within a single structure: it provides spinal stabilization, incorporates locking mechanisms for secement, and guides screw trajectories. This multi-functionality reduces the need for separate specialized components, thereby reducing overall device complexity and part count.
2Reliability
If traditional pedicle screw fusion techniques are used, then spinal stabilization can be achieved, but prolonged surgical time increases risk and cost
Solution Approach 1:
The fusion device is pre-configured with integrated locking mechanisms and predetermined screw trajectories. This preliminary preparation eliminates the need for time-consuming intraoperative adjustments and complex assembly steps, thereby reducing surgical time while maintaining reliable stabilization.
Solution Approach 2:
By combining multiple functions into a single integrated device, the surgical procedure is simplified and performed more quickly. The unified structure eliminates the need for multiple separate implantation steps, reducing overall surgical time and associated risks.
3Reliability
If traditional pedicle screw fusion techniques are used, then spinal stabilization can be achieved, but the large number of parts increases cost
Solution Approach 1:
The patent merges multiple separate components into a single integrated fusion device, reducing the total number of parts required. This consolidation maintains the reliability of spinal stabilization while reducing device complexity and associated costs.
4Reliability
If precise screw placement is required for spinal stabilization, then construct reliability improves, but surgical complexity and time increase
Solution Approach 1:
The fusion device incorporates localized features such as predetermined screw trajectories and integrated locking mechanisms at specific locations. These local quality enhancements ensure precise screw placement and reliable locking without requiring complex surgical techniques throughout the entire procedure.
Solution Approach 2:
The screw trajectories and locking mechanisms are pre-configured in the device design, eliminating the need for complex intraoperative planning and adjustment. This preliminary preparation ensures precise screw placement while simplifying the surgical technique required.
Data Source
AI summary
The present disclosure includes implant systems, devices, implants, guides, instruments and methods of use. The insertion guide including a base member having a first opening with a first trajectory and a second opening with a second trajectory, a connecting member having a first end and a second end, wherein the first end is coupled to the base member and a locking block coupled to the second end of the connecting member. The locking block has a first guide hole and a second guide hole. The implant including a body including a first hole at a first end of the body, a second hole at a second end of the body, and a locking opening positioned between the first hole and the second hole. Methods of using the implant systems are also disclosed.