Ultrasonic Osteotomy Blade With Arcuate Tip And Symmetric Teeth
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Solution Overview
Problem
Existing ultrasonic cutting devices for osteotomy lack precision and require significant manual effort, especially when cutting through bones of varying consistency and thickness, and may damage underlying tissues during spinal and cranial surgery.
Innovation Solution
An ultrasonic cutting device with a blade featuring a continuous arcuate cutting profile and symmetrically aligned teeth, providing initial penetration and gradual widening of the cut, respectively, allowing for improved precision and reduced manual effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional flat blade with longitudinal vibrations is used, then the device can cut bone tissue with reciprocating movement, but it requires significant manual force and reduces cutting precision
Solution Approach 1:
The blade is equipped with ultrasonic vibrations (20 kHz or higher) that facilitate bone tissue penetration and cutting. The vibration frequency and amplitude are optimized to reduce the manual force required while maintaining high cutting precision through the oscillating cutting action
Solution Approach 2:
The blade features a specific geometric configuration with an arcuate portion at the distal end and teeth arranged in incident directions. This local structural optimization enables the blade to effectively cut through bone tissue of varying consistency and thickness with reduced manual effort and enhanced precision
2Measurement precision
If a standard blade geometry is used, then the device can perform basic cutting, but it lacks the ability to guide penetration and widen cuts with precision
Solution Approach 1:
The blade is divided into distinct functional segments: an arcuate portion for initial penetration and guidance, and teeth for widening the cut. This segmentation allows each part to perform its specific function optimally, providing precise blade guidance while enabling controlled cut widening without excessive complexity
Solution Approach 2:
The blade geometry incorporates three-dimensional features including the arcuate portion curvature and teeth arranged in incident directions relative to the longitudinal axis. This dimensional complexity enables the blade to guide penetration effectively and widen cuts precisely through its spatial configuration
3Reliability
If manual reciprocating movement is used to widen the cut, then the surgeon has control, but it increases the risk of damaging underlying tissues
Solution Approach 1:
The blade's teeth are configured to automatically widen the cut as the blade advances through bone tissue. The incident direction of the teeth causes them to progressively expand the slit without requiring manual sideways movement, thereby protecting underlying tissues while maintaining cutting control
Solution Approach 2:
The arcuate portion of the blade performs the initial penetration and creates a controlled entry point before the teeth engage to widen the cut. This preliminary action establishes a safe pathway that reduces the risk of damaging underlying tissues during the widening phase
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 device enhances cutting precision and reduces the need for manual blade movement, enabling precise cuts through varying bone thicknesses while minimizing tissue damage.
Implementation Method 1
ultrasound devices are extremely common, which include a vibration generator with an ultrasonic frequency, typically of the order of a few tens of kHz, for example 20 kHz or higher
Data Source
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AI summary
The invention relates to an ultrasonic cutting device (100) for osteotomy, said device comprising: - a blade (110) extending in a longitudinal direction (L); - an attachment member (120) configured to be connected, through a suitable extension member, with a handpiece configured to generate vibrations that are mainly directed in said longitudinal direction (L), said attachment member being connected to a proximal end (111) of said blade (110); wherein the blade (110) further comprises a plurality of cutting elements formed on a distal portion (112) thereof, The cutting elements of the distal portion (112) comprise: - an arcuate portion (113) arranged at a free end of said distal portion (112) in the longitudinal direction (L), said arcuate portion (113) having a continuous cutting edge (114); - a plurality of teeth (117, 118) having a triangular shape, said teeth (117, 118) being formed on opposite sides of the blade (110) symmetrically with respect to a longitudinal axis (A) thereof, the teeth (117, 118) being aligned with each other along respective directions that are incident relative to said longitudinal axis (A), the overall configuration of the distal portion (112) of the blade (110) being symmetrical relative to the longitudinal axis (A) and progressively widening from the arcuate portion (113) towards the proximal portion (111) of the blade (110) in the portion where the teeth (117, 118) are formed.