Piezosurgery Tool Bit Spoon Design for Ultrasonic Bone Cutting
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Solution Overview
Problem
Conventional ultrasonic osteotomes apply downward forces during surgery, leading to low cutting speed, increased risk of tissue damage, and potential tool breakage, which complicates surgeries and reduces success rates.
Innovation Solution
A tool bit with a spoon-like end portion and arbor design featuring tooth slots, hollow inner chambers, and strategically placed bores for efficient cutting and real-time cooling, allowing precise positioning and reduced tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If downward force is applied during cutting operation, then cutting action is achieved, but cutting speed decreases and tool breakage risk increases
Solution Approach 1:
The patent utilizes ultrasonic vibration of the tool bit at high frequency to perform cutting operations. The vibrational motion enables the tool to cut bone tissue without requiring significant downward force, thereby maintaining high cutting speed while preventing tool breakage. The ultrasonic vibration creates micro-fractures in the bone material through cyclic loading, achieving efficient cutting with minimal applied force.
2Object-affected harmful factors
If downward force is applied during cutting operation, then cutting action is achieved, but risk of damaging soft tissue below cutting location increases
Solution Approach 1:
The ultrasonic vibration mechanism allows the tool to cut with minimal downward force, preventing damage to soft tissues located below the cutting site. The high-frequency oscillations confine the cutting action to the immediate contact point, creating precise cuts without compressing or damaging underlying structures.
3Productivity
If conventional tool bit structure with wide tip and multiple teeth is used, then cutting function is provided, but most of the tip area does not contribute to effective cutting
Solution Approach 1:
The patent optimizes the tool bit geometry so that the entire tip surface actively participates in cutting. The tip is designed with a specific curvature and tooth distribution that ensures every point on the tip surface contributes to the cutting action during ultrasonic vibration, maximizing the utilization of the tool bit material and improving cutting efficiency.
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 design enhances cutting speed, reduces surgery time, improves accuracy, and minimizes tissue damage, thereby increasing the success rate and safety of surgical operations.
Implementation Method 1
ultrasonicosteotome apply downward forces in most of operations in surgery
Implementation Method 2
strategically placed bores for efficient cutting and real-time cooling
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3~5
AI summary
A tool bit (100) of an ultrasonic osteotome includes: an arbor (2); and an end portion (1) of the tool bit connected to a front end of the arbor (2). The end portion (1) of the tool bit has a spoon-like shape and has a toothed front edge. An ultrasonic osteotome including the tool bit is also provided.