Straight-Flute Mastoid Drill Bit for Cooler, Rounder Bone Holes
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Solution Overview
Problem
Current bone drilling techniques for implanting prostheses, such as bone conduction devices, face challenges with heat generation, drill time, bone shaving transport, and hole roundness, which can affect osseointegration and the efficiency of the drilling process.
Innovation Solution
A drill bit with longitudinally extending straight flute blades, designed to minimize heat generation and improve bone shaving transport, featuring a curved distal end and straight proximal side, which reduces drill wander and enhances hole roundness, allowing for faster and more precise drilling into the mastoid bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional bone drilling techniques are used, then drilling can be performed, but heat generation increases which adversely affects bone osseointegration
Solution Approach 1:
The drill bit is segmented into multiple straight flute blades (at least three) arranged around the longitudinal axis, creating separate cutting edges that reduce concentrated heat generation at a single point. The segmentation allows for better heat dissipation and reduced thermal impact on surrounding bone tissue.
Solution Approach 2:
The drill bit features a curved distal end (semi-circular or rounded tip) rather than a sharp point, which distributes the cutting action over a larger area and reduces localized heat generation. This curvature also improves hole roundness and reduces drill wander during the drilling process.
2Productivity
If traditional drill bits are used, then drilling can be performed, but drill time increases reducing surgical efficiency
Solution Approach 1:
The curved distal end and straight flute blades are designed to facilitate preliminary cutting action that creates a clean, round hole from the start. This preliminary geometric configuration reduces the need for multiple drilling passes or corrective actions, thereby reducing total drill time.
3Manufacturing precision
If traditional drill bits are used, then drilling can be performed, but bone shaving transport is inefficient affecting hole quality
Solution Approach 1:
The multiple straight flute blades create distinct channels for bone shaving ejection. Each flute blade acts as an independent conveyor, efficiently transporting bone debris out of the hole without clogging, thereby maintaining hole roundness and quality throughout the drilling process.
4Measurement precision
If traditional drill bits are used, then drilling can be performed, but drill wander occurs reducing drilling precision
Solution Approach 1:
The curved distal end provides a stable, rounded leading edge that maintains consistent contact with the bone surface during drilling initiation. This geometry prevents the drill bit from wandering or deviating from the intended path, ensuring precise hole placement and roundness.
Data Source
AI summary
A drill bit for drilling into bone, including at least a first, second and third longitudinally extending substantially straight flute blades, wherein the drill bit has an extrapolated outer profile established by rotation of the first, second and third flute blades 360 degrees about a longitudinal axis thereof, the extrapolated outer profile includes a first surface having tangents more perpendicular than parallel to the longitudinal axis, and the extrapolated outer profile includes a second surface having tangents more parallel than perpendicular to the longitudinal axis.