Sacroiliac Fusion Implant With Deployable Wings for Joint Compression
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Solution Overview
Problem
Existing sacroiliac (SI) joint fusion devices fail to provide adequate compression across the joint, leading to difficulty in fusion due to significant micromotions, and lack moving mechanical components that are actuated once implanted.
Innovation Solution
An implant with a distal anchor featuring deployable wings and a threaded proximal end, allowing for adjustable compression across the SI joint through a plunger mechanism, and a compressive element to anchor against the ilium, facilitating fusion and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If typical SI joint fusion devices are used, then the implant can be inserted over a guidewire, but the device fails to provide adequate compression across the SI joint to enhance fusion
Solution Approach 1:
The implant incorporates a dynamic compression mechanism where a compressive element can be adjusted along the implant body to provide variable compression forces. This allows the device to adapt to different patient anatomies and provide adequate compression for fusion while maintaining reliability.
Solution Approach 2:
The implant allows changes in the compression parameter through adjustable positioning of the compressive element. By modifying the compression force parameter, the device can achieve adequate compression across the SI joint to enhance fusion while maintaining reliability.
2Ease of operation
If typical SI joint fusion devices are used, then the implant structure is simple, but the device lacks moving mechanical components that are actuated once implanted
Solution Approach 1:
The implant includes a dynamic compression mechanism with a compressive element that can be adjusted along the implant body. This moving mechanical component can be actuated after implantation to provide compression, enhancing fusion while maintaining reasonable device complexity through a straightforward adjustment mechanism.
3Stability of the object's composition
If the SI joint is not compressed adequately, then micromotions occur that prevent fusion, but applying compression requires complex mechanical structures
Solution Approach 1:
The implant incorporates a dynamic compression mechanism where a compressive element can be adjusted along the implant body to provide variable compression forces. This allows the device to stabilize the joint by reducing micromotions while maintaining reasonable complexity through a straightforward adjustment mechanism.
Solution Approach 2:
The implant allows changes in the compression parameter through adjustable positioning of the compressive element. By modifying the compression force parameter, the device can achieve adequate compression to stabilize the joint and reduce micromotions without requiring overly complex mechanical structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The implant provides adjustable compression, reducing micromotions and enhancing fusion and stabilization of the SI joint, with minimally invasive insertion and quicker recovery times.
Implementation Method 1
a threaded proximal end along the length of the first body; and a second body coupled to the threaded proximal end, the second body including a proximal anchor disposed on an outer surface of the second body, wherein the second body is configured to be threaded along the threaded proximal end to adjust an overall length of the implant
Data Source
AI summary
Systems, methods, and devices for sacroiliac joint fusion described include an implant comprising a first body having a distal anchor and a second body having proximal anchor. The first body includes a threaded body integrally formed with the first body or threadably coupled to the first body. The distal anchor may be formed by a pair of deployable wings. The pair of deployable wings may be deployed within the cancellous bone of the sacrum and anchored against the cortical bone of the sacrum. The proximal anchor may engage with an outer surface of the ilium. The second body may be threaded along the threaded body to provide compression across the sacroiliac joint. Compressing the sacroiliac joint can reduce motion thereof to promote fusion and stabilization.