Surgical Bur Localized Flute Structure for Exposure and Stability
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Solution Overview
Problem
Existing surgical burs face challenges in balancing cutting efficiency, stability, working length, and visibility, as enhancements in one region often negatively affect other regions.
Innovation Solution
The implementation of localized flute features on surgical burs, which include auxiliary flutes in specific regions to enhance cutting efficiency and stability without compromising other characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the exposure length of the surgical tool is increased to improve visibility and access, then the surgeon can better reach and visualize the surgical site, but the stability of the surgical tool during axial rotation deteriorates
Solution Approach 1:
The surgical bur incorporates auxiliary flutes in specific localized regions (distal and/or proximal) rather than uniform flutes throughout. This local differentiation allows the bur to provide enhanced cutting performance in specific areas while maintaining overall structural stability, resolving the contradiction between exposure length and stability.
2Productivity
If auxiliary flutes are added to enhance cutting efficiency in specific regions, then the cutting performance is improved, but the complexity of the surgical bur structure increases
Solution Approach 1:
The surgical bur is segmented into different functional regions with distinct flute configurations. Main flutes extend along the entire length while auxiliary flutes are positioned in specific segments (distal or proximal regions). This segmentation allows enhanced cutting efficiency in specific areas without requiring complete redesign of the entire bur structure, thus managing complexity.
3Length of moving object
If the shaft length is increased to provide greater exposure, then the working length is extended, but the instability of the surgical tool increases
Solution Approach 1:
The invention changes the geometric parameters of the flutes, specifically adding auxiliary flutes with different orientations and positions compared to main flutes. This parameter modification allows the bur to maintain stability while working with extended exposure lengths, as the localized auxiliary flutes provide structural reinforcement without requiring a shorter shaft.
Data Source
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AI summary
A surgical bur including primary flutes (58) and auxiliary flutes (52). The primary flutes include (i) first clearance surfaces (70, 72), and (ii) first rake surfaces (74, 76) with first cutting edges (86). The primary flutes extend from a proximal end (60) of the surgical bur to a distal end (62) of the surgical bur. The auxiliary flutes are localized in central regions or distal regions of the surgical bur. The auxiliary flutes include (i) second clearance surfaces (90), and (ii) second rake surfaces (94) with second cutting edges (96). At least one of the auxiliary flutes is located between a pair of adjacent ones of the primary flutes.