Posterior SI Joint Prosthesis Placement for Stable Fixation
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Solution Overview
Problem
Conventional SI joint stabilization methods, both open and minimally-invasive, suffer from disadvantages such as extensive tissue damage, increased risk of complications, difficulty in placement, and prostheses displacement, leading to pain and structural instability in dysfunctional sacroiliac joints.
Innovation Solution
Development of minimally-invasive SI joint stabilization systems and apparatus that utilize a posterior trajectory for prosthesis placement, featuring a posteriorly advanced prosthesis design with elongated sections and bridge sections to transfix the joint, minimizing tissue disruption and ensuring secure engagement with the SI joint structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional open surgery methods are used for SI joint stabilization, then effective pain amelioration is achieved, but extensive tissue damage and increased operative time occur
Solution Approach 1:
The surgical approach is divided into two separate procedures: first, a minimally-invasive posterior trajectory prosthesis placement to stabilize the SI joint; second, a separate open surgery to address any remaining issues. This segmentation allows the high-risk open surgery to be performed only when necessary, reducing overall tissue damage compared to traditional single-stage open surgery.
Solution Approach 2:
A minimally-invasive posterior trajectory prosthesis is introduced as an intermediary device to stabilize the SI joint before requiring open surgery. This intermediary prosthesis reduces the need for extensive soft tissue dissection during the subsequent open procedure, thereby reducing overall tissue damage while maintaining stabilization effectiveness.
2Object-affected harmful factors
If minimally-invasive methods are used for SI joint stabilization, then tissue damage is reduced, but prosthesis placement difficulty and displacement risk increase
Solution Approach 1:
The posterior trajectory prosthesis is placed first as a preliminary stabilization measure before the open surgery. This preliminary placement secures the SI joint in a stable position, making the subsequent open surgery easier to perform and reducing the risk of prosthesis displacement during the complete surgical process.
3Reliability
If single-stage open surgery is performed, then complete SI joint stabilization is achieved, but operative time and hospitalization increase
Solution Approach 1:
The surgical treatment is segmented into two stages: a minimally-invasive first stage for initial stabilization, and a separate open surgery stage for complete stabilization if needed. This segmentation reduces the operative time and hospitalization associated with performing complete stabilization in a single lengthy open procedure.
Data Source
AI summary
Prostheses and methods are described for stabilizing dysfunctional sacroiliac (SI) joints. The prostheses are configured to be advanced into dysfunctional SI joints in a posterior trajectory via surgically created pilot SI joint openings in the dysfunctional SI joint. The prostheses have first and second elongated edge sections, and a third elongated section disposed centrally between the first and second elongated sections. The prostheses also have a first bridge sections disposed between and connected to the first and third elongated sections and a second bridge section disposed between and connected to the second and third elongated sections.