Surgical Milling Tool with Balanced Apertures for Jam-Free Bone Excavation
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Solution Overview
Problem
Existing milling tools for prosthetic surgery operations face issues with precision and stability during bone seating preparation, leading to potential jamming and inefficiency due to unbalanced rotation and accumulation of excavated tissue, which can damage both hard and soft tissues.
Innovation Solution
A milling tool with a cap body featuring oblong through apertures and cutting profiles distributed along the circular flank, allowing for balanced rotation and efficient tissue discharge, reducing the risk of blockages and enabling simultaneous incision of hard and soft tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If through holes are provided with cutting edges to perform mechanical excavation of bone, then the tool can effectively remove bone tissue, but the excavated tissue accumulates and blocks the holes, causing jamming and loss of efficiency
Solution Approach 1:
The invention extracts the harmful accumulated tissue from the system by providing discharge paths (through apertures) that lead tissue removal away from the cutting zone, preventing blockage and maintaining continuous efficient operation
Solution Approach 2:
The invention adds a spatial dimension to tissue removal by creating three-dimensional through apertures that extend through the cap body, allowing tissue to be discharged in multiple directions rather than accumulating in a single plane
2Ease of operation
If the cap body is mounted on a manipulator for rotation, then the tool can perform milling operations, but the assembly may be imprecise and unstable, causing unbalanced rotation and affecting excavation quality
Solution Approach 1:
The invention creates equipotential conditions for rotation by providing balanced counterweights and symmetric through apertures distributed evenly around the cap body, ensuring uniform weight distribution and stable rotation regardless of manipulator assembly variations
Solution Approach 2:
The invention uses composite construction with the cap body made of material having specific density and mass distribution properties that compensate for assembly tolerances, ensuring balanced rotation through material composition rather than perfect mechanical alignment
3Device complexity
If individual cutting edges are made small to fit in through holes, then the tool can be compact, but they have difficulty simultaneously incising hard bone tissue and soft ligaments, potentially damaging bone structure
Solution Approach 1:
The invention segments the cutting function into multiple small cutting edges distributed around the cap body, each capable of independent action on different tissue types, with the collective effect achieving both bone incision and ligament cutting without damage
Solution Approach 2:
The invention applies local quality by varying the geometry, orientation, and distribution of cutting edges at different locations on the cap body, allowing specific edges to be optimized for hard bone cutting while others handle soft ligament cutting, with each location having customized cutting characteristics
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 achieves precise and stable bone excavation with reduced risk of jamming and tissue damage, ensuring high-quality operations by maintaining tool efficiency and preventing structural damage.
Implementation Method 1
a cutting profile... to perform a mechanical action of excavation of the bone
Data Source
Figure 1~4
Figure 5~6
AI summary
Milling tool for prosthetic surgery operations comprising a cap body (11, 111), hollow inside, at least a cutting profile (17), associated with said cap body (11, 111), and an attachment support (12) positioned and constrained with respect to the cap body (11, 111) and by means of which said cap body (11, 111) can be selectively associated with a relative manual or automatic manipulator.