Expandable Bone Implant With Integrated Anchoring and Internal Expansion
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Solution Overview
Problem
Existing expandable implants for vertebral fractures lack sufficient anchoring, leading to a risk of displacement and mechanical instability, and often require complex expansion mechanisms prone to failure.
Innovation Solution
An expandable implant with an anchoring body and an expandable part that are integrated as a single mechanical system, allowing for precise positioning and orientation, and utilizing a drive part to expand the implant without separate instruments, reducing the risk of mechanical failure and improving anchoring stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate stent and pedicle fixation components are used, then the implant can be expanded, but the anchoring stability is insufficient and displacement risk increases
Solution Approach 1:
The patent merges the stent and pedicle fixation into a single integrated implant component. The stent portion and pedicle fixation portion are connected as one monolithic structure, eliminating the need for separate components and their associated coupling mechanisms. This integration directly improves anchoring stability while reducing device complexity.
2Ease of operation
If complex expansion mechanisms with separate instruments are used, then the implant can be expanded, but the risk of mechanical failure increases
Solution Approach 1:
The implant incorporates an integrated expansion mechanism that is self-contained within the single component structure. The expansion is achieved through internal mechanisms rather than requiring separate external instruments, reducing the number of moving parts and potential failure points while maintaining ease of operation.
3Adaptability or versatility
If the implant is loosely coupled to pedicle fixation, then the implant can be freely positioned, but anchoring stability is compromised
Solution Approach 1:
By merging the stent and pedicle fixation into one integrated component, the implant achieves both positioning freedom and anchoring stability simultaneously. The single component is designed to be positioned freely during insertion, then anchored securely through its integrated pedicle fixation portion, eliminating the trade-off between positioning freedom and anchoring stability.
Data Source
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AI summary
An expandable implant (1) implantable in an intra-osseous cavity of a bone comprises an anchoring body (2) having a distal end and a proximal end for anchoring the distal end relative to a part of the bone outside the cavity. An expandable part (4), for in the intra¬ osseous cavity, is fixated to the anchoring body, e.g. at the distal end. The expandable part comprises a movable piece with a load supporting surface for supporting a wall of the cavity against a load acting on the bone. The movable piece is movable away from the anchoring body in a direction of expansion perpendicular to the longitudinal direction, to bring the load supporting surface from an initial position in a non-expanded state to an expanded position in a expanded state in which the load supporting surface abuts to the wall. A driving part (70) is movable relative to the proximal end of the anchoring body. A transmission (73) extends between the driving part and the expandable part, the transmission engaging on the load supporting surface for transferring at least a part of a force exerted on the driving part to move the driving part relative to the proximal end of the anchoring body to the load supporting surface and thereby actuate movement of the load supporting surface in the direction of expansion.