Hook-Shaped Ultrasonic Osteotome Tool Bit for Bone Cutting
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Solution Overview
Problem
Conventional ultrasonic osteotomes have low cutting efficiency and accuracy, are prone to breaking, and pose a risk of injury due to complex design and high production costs, with existing solutions failing to ensure precise positioning and efficient bone cutting.
Innovation Solution
A tool bit for an ultrasonic osteotome featuring a hook-like end portion with a tooth-like outer edge and a gradually increasing cross-section, allowing for high cutting efficiency and accurate positioning, integrated design for reduced manufacturing costs, and a hemostasis effect to minimize bleeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional tool bit with multiple teeth and wide tip is used, then it can perform cutting operations on bone, but the cutting speed is low and the tool bit is prone to breaking
Solution Approach 1:
The tool bit is divided into distinct functional segments: a narrow shaft for access, a transition section for stress distribution, and a hook-shaped working end with teeth for cutting. This segmentation allows each part to be optimized for its specific function, improving both cutting speed and reducing breakage risk.
Solution Approach 2:
The tool bit features a hook-shaped curved end portion instead of a straight design. This curvature allows the cutting teeth to engage bone tissue more effectively, enabling faster cutting while the gradual transition from shaft to hook distributes mechanical stress, preventing breakage.
2Productivity
If force is applied downwardly to the osseous tissue for cutting, then cutting operation can be performed, but the cutting speed is low and the tool bit may break
Solution Approach 1:
Instead of applying force directly downward with a straight tool bit, the hook-shaped design allows the cutting action to occur as the tool is withdrawn or moved laterally, with the hook engaging and pulling through the bone. This inverted cutting mechanism improves efficiency while reducing stress on the tool bit.
Solution Approach 2:
The hook shape is pre-formed to naturally engage the bone tissue, creating a mechanical advantage that initiates cutting action before full force is applied. The curved geometry prepares the cutting teeth for optimal engagement, improving efficiency while distributing loads to prevent breakage.
3Object-affected harmful factors
If the tool bit is inserted into tissue such as marrow accidentally, then it causes unretrievable injury, but this risk exists with conventional tool bits as well
Solution Approach 1:
The hook-shaped end portion creates an asymmetric tool bit that is difficult to insert backward or in incorrect orientation. The curved hook geometry only fits properly when oriented correctly, preventing accidental insertion into sensitive tissues like marrow and improving surgical safety.
4Productivity
If the tool bit has a complex shape for cutting functionality, then it can perform cutting operations, but it is difficult to machine and production cost is high
Solution Approach 1:
The shaft, transition section, and hook-shaped working end are formed as a single integrated component rather than separate parts requiring assembly. This merging simplifies manufacturing processes while maintaining the complex hook shape needed for effective cutting functionality.
Solution Approach 2:
The cross-sectional dimensions of the tool bit are gradually changed from the narrow shaft through the transition section to the hook end, creating a smooth gradient that is easier to machine than abrupt transitions. This parameter change approach maintains functional complexity while improving manufacturability.
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 tool bit achieves high cutting efficiency, reduces surgery time, minimizes bone wastage and bleeding, and lowers production costs while ensuring precise positioning and reduced risk of injury to surrounding tissue.
Implementation Method 1
an ultrasonic osteotome is usually used to perform cutting, grinding, planing, scraping
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~5
AI summary
Disclosed are a tool bit of an ultrasonic osteotome and an ultrasonic osteotome including the same, the tool bit comprising: an arbour (2); and an end portion (1) of the tool bit connected to a front end of arbour (2), wherein the end portion (1) of the tool bit has a hook-like shape and includes a hook tip (11), a hook handle (13), as well as a hook-shaped interconnecting piece (12) which is interconnected between the hook tip (11) and the hook handle (13). The hook handle (13) is connected with the arbour (2), and the inner side edge of the hook-shaped interconnecting piece (12) is tooth-like. With this ultrasonic osteotome, the cutting efficiency is high and surgery time is short, therefore the labour intensity of medical workers is decreased. Moreover, accurate positioning can be realized in cutting process with no skidding, so the chance of success of surgery can be improved.