Star-Shaped Bone Fusing Implant with Segmented Threads
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Solution Overview
Problem
Traditional open surgeries for sacroiliac joint fusion result in large incisions, extensive muscle stripping, prolonged muscle retraction, neural tissue injury, and prolonged recovery times, leading to complications and pain.
Innovation Solution
Development of bone fusing implants with cortical and cancellous threads, elongated gutters, and bone growth enhancing additives, designed for minimally invasive procedures to facilitate sacroiliac joint fusion with reduced tissue disruption and neural injury, using materials like PEEK, Nitinol, and titanium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional open surgery is used for sacroiliac joint fusion, then effective bone fusion can be achieved, but large incisions, extensive muscle stripping, prolonged muscle retraction, and neural tissue injury occur
Solution Approach 1:
The implant is divided into multiple segments with different thread types (cortical threads for outer bone, cancellous threads for inner bone) to engage different bone layers separately, allowing effective fusion while enabling minimally invasive insertion through segmented engagement zones
Solution Approach 2:
The implant acts as an intermediary device that transfers and distributes mechanical loads between the sacrum and ilium, facilitating bone fusion without requiring extensive soft tissue dissection or direct neural tissue manipulation
2Stability of the object's composition
If traditional open surgery is used for sacroiliac joint fusion, then stable fixation can be achieved, but prolonged recovery times and post-surgical pain result
Solution Approach 1:
The implant incorporates dynamic elements including elastomeric members that allow controlled movement and adaptation during the healing process, providing stable fixation initially while gradually permitting physiological motion to stimulate bone healing and reduce recovery time
Solution Approach 2:
The implant includes porous regions that allow bone ingrowth and vascularization, accelerating the fusion process and reducing recovery time while maintaining structural stability through the porous architecture
3Object-affected harmful factors
If minimally invasive techniques are used, then tissue disruption is reduced, but implant stability and fusion effectiveness may be compromised
Solution Approach 1:
The implant utilizes composite construction combining different materials and thread types (cortical and cancellous threads) in a single device, enabling strong engagement with both cortical and cancellous bone layers through minimally invasive percutaneous insertion while maintaining high fixation strength
Solution Approach 2:
The implant features nested engagement zones where cortical threads engage the outer cortical bone layer and cancellous threads engage the inner cancellous bone layer, creating a nested fixation pattern that maximizes strength through minimally invasive insertion
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 implants enable effective bone fusion with reduced tissue damage and faster recovery by minimizing incision size, muscle stripping, and neural tissue retraction, improving patient outcomes and reducing post-surgical pain.
Implementation Method 1
a first segment having an outer surface with cortical threads... configured to engage a cortical bone with the cortical threads
Implementation Method 2
a second segment having an outer surface with cancellous threads... configured to engage a cancellous bone with the cancellous threads
Implementation Method 3
bone growth enhancing additives, designed for minimally invasive procedures to facilitate sacroiliac joint fusion
Data Source
AI summary
A bone fusing implant device includes an elongated body extending along a longitudinal direction and having a star-shaped cross-section. The elongated body includes a central through-opening extending through the elongated body's center along the longitudinal direction and an outer surface with alternating elongated ridges and slit openings extending along the longitudinal direction. The outer surface is coated with bone growth enhancing additives.