Removable Bone Penetration Tip With Deformable Locking Mechanism
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Solution Overview
Problem
Current bone coring devices face challenges in efficiently penetrating and accessing cancellous bone, particularly in scenarios where cortical bone needs to be penetrated to reach underlying cancellous tissue for diagnostic or grafting purposes, with existing devices lacking effective mechanisms for secure engagement and efficient transmission of torsional loads.
Innovation Solution
A removable tip device with a bone penetration feature and a securing feature that releasably engages the distal end of a bone coring device, including a deformable element and a protective element, allows for efficient penetration and stabilization during the coring process, minimizing movement and optimizing load transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a removable tip device is used to penetrate cortical bone, then the ability to access cancellous bone is improved, but the device complexity increases due to the need for secure engagement mechanisms
Solution Approach 1:
The bone coring device is divided into a reusable handle assembly and a removable tip assembly. The tip can be detached and replaced depending on the specific surgical requirement (e.g., different for cortical penetration vs. cancellous bone coring), allowing adaptability without redesigning the entire device.
Solution Approach 2:
The handle assembly is designed with a universal engagement mechanism that can accommodate multiple tip types through the same securing feature. This allows one handle to perform multiple functions by simply changing the tip, reducing the need for multiple complete devices.
2Strength
If a secure engagement mechanism is implemented, then the transmission of torsional loads is improved, but the ease of operation is reduced due to the complexity of engagement and disengagement
Solution Approach 1:
The securing feature incorporates a deformable element that dynamically changes state during engagement. When torsional loads are applied, the deformable element deforms to lock the tip securely to the handle, providing strong load transmission. During disengagement, the deformable element returns to its original state, allowing easy release without complex mechanisms.
3Power
If a deformable element is used to transmit torsional loads, then the load transmission efficiency is improved, but the device complexity increases
Solution Approach 1:
The deformable element changes its physical parameters (shape, rigidity) in response to applied loads. Under torsional loading, the element deforms to engage locking surfaces, transforming from a flexible state to a rigid locked state, thereby efficiently transmitting power without requiring complex mechanical components.
4Reliability
If protective elements are added to protect distal features, then the reliability is improved, but the device complexity increases
Solution Approach 1:
Protective elements such as protective surfaces are incorporated into the tip design before the distal features are exposed to potential damage. These elements act as sacrificial components that absorb impacts or prevent direct contact between the distal cutting features and external objects, ensuring reliable operation without complex protective mechanisms.
Data Source
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AI summary
Disclosed are embodiments of a removable tip device, which include a bone penetration feature at a distal end and a securing feature that allows the removable tip device to be removably secured to a distal end of various embodiments of a bone coring device. Some embodiments of the removable tip device include features that assist in transmitting torsional loads from the bone coring device to the bone removal feature. In addition, some embodiments of the removable tip device include a protective element that is configured to provide a protective surface for a distal feature of the bone coring device.