Spinal Fixation Assembly With Rotatable Wing Plates and Screw Retention
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Solution Overview
Problem
Conventional spine fixation devices face issues with detachment risk and reduced plate stability due to fixed heights and lack of screw retention mechanisms, posing risks to adjacent nerves and spinal stability during spinal fusion procedures.
Innovation Solution
A spine fixing device with rotatable wing plates coupled via spherical or capsular ends, a rotatable cover with a press-fit structure, and a rotation-limiting stopper to adjust fixation strength, ensuring flexible fitting to the spine's shape and preventing screw detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a bone graft is used to fill the void left by a removed bone screw, then the structural integrity and stability of the spinal fixation system are improved, but the complexity of the surgical procedure and the time required for implantation increase
Solution Approach 1:
A collagen sponge acts as an intermediary material that fills the void created by bone screw removal. The sponge serves as a temporary placeholder that maintains structural integrity while allowing bone regrowth, eliminating the need for complex bone graft harvesting and implantation procedures.
Solution Approach 2:
The collagen sponge is a biodegradable, temporary implant that serves its structural support function during the bone healing process and then naturally degrades. This disposable approach avoids the complexity of permanent implants and the need for secondary removal surgeries.
2Reliability
If a bone graft is harvested from the patient's body to fill the void, then the biocompatibility and integration with surrounding bone tissue are improved, but the duration of the surgical procedure and patient trauma increase
Solution Approach 1:
The collagen sponge is a biodegradable material that temporarily performs the structural support function needed for bone graft integration. It degrades naturally over time as new bone forms, eliminating the need for long-term foreign body implants while maintaining biocompatibility throughout the healing process.
Solution Approach 2:
The collagen sponge serves as a temporary intermediary that facilitates bone graft integration by providing a scaffold for bone growth. It maintains the void space during the critical early healing phase and then gradually disappears as the bone remodels, avoiding the need for permanent implants.
3Measurement precision
If a metal artifact reduction sequence is applied during MRI scanning, then the accuracy of imaging the spinal fusion cage and surrounding bone is improved, but the complexity of the imaging protocol and interpretation increase
Solution Approach 1:
The collagen sponge changes its magnetic properties over time as it degrades biologically. Initially more MRI-compatible, it gradually becomes increasingly artifact-prone as degradation progresses, allowing clinicians to optimize imaging timing based on the specific clinical question and expected degradation state.
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
The present disclosure relates to a spine fixing device including: a base plate; a cage configured to be coupled to the base plate; a first wing plate configured to be coupled to an upper portion of a composite body of the base plate and the cage; and a second wing plate configured to be coupled to a lower portion of the composite body of the base plate and the cage.