Spinal Screw Fixation Device with Three-Point Locking Structure
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Solution Overview
Problem
Current spinal screw fixation devices, particularly in osteoporotic patients, face issues with loose screws leading to surgery failure due to inadequate fixation, as existing technologies do not effectively enhance the stability of bone screws in spinal surgeries.
Innovation Solution
A spinal screw fixation device is developed, comprising a spinal screw, a fixing screw, and a locking plate forming a three-point fixed structure with an oblique perforation hole and locking holes, providing a 3D locking effect to prevent screw loosening and misplacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pedicle screws are used for spinal fixation, then the fixation effect is excellent and widely used, but the wound opening is larger and the surgery is more complex
Solution Approach 1:
The patent inverts the traditional pedicle screw approach by using cortical screws that enter the bone from the opposite direction (from the cortical bone surface rather than through the pedicle), achieving similar fixation效果 with a smaller wound opening and simpler procedure
2Device complexity
If cortical screws are used for spinal fixation, then the wound opening is smaller, but the screw is not widely used in clinical practice due to the need for bone driller
Solution Approach 1:
The patent applies preliminary action by pre-forming threaded structures on the cortical screw surface that enable direct engagement with bone tissue without requiring bone drilling, thus simplifying the surgical procedure while maintaining the advantage of smaller wound opening
3Productivity
If traditional spinal screws are used in osteoporosis patients, then the surgery can be performed, but the screw becomes loose and the surgery fails
Solution Approach 1:
The patent employs composite material principles by combining cortical screw structure with specially designed thread patterns and surface characteristics that provide enhanced grip in osteoporotic bone, preventing screw loosening and surgery failure
Data Source
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AI summary
A spinal screw fixation device is provided. The spinal screw fixation device includes a spinal screw, a fixing screw, and a locking plate. The spinal screw has an oblique perforation hole through which the fixing screw passes. The locking plate has two locking holes through which the spinal screw and the fixing screw pass, respectively. The spinal screw, the fixing screw and the locking plate constitute a three-point fixed structure.