Dental Drill Guide Sleeve for Coaxial Bushing Alignment
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Solution Overview
Problem
Current dental drill bit guiding systems lack precision and stability, leading to imprecise alignment and increased discomfort for patients due to inadequate centering and guiding during bone drilling procedures.
Innovation Solution
A rigid guide-sleeve system is designed to couple with a dental handpiece and an oral surgical guide, ensuring coaxial alignment of the drill bit with the guide's central axis, providing a close fit between the drill bit shank and the guide-sleeve to enhance stability and prevent contact with the bushing, while allowing for irrigation and accommodating drill bits with varying cutting portion diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the inner diameter of the guide-sleeve is made very close to the diameter of the drill bit shank to improve alignment precision, then manufacturing precision and reliability are improved, but the risk of contact between the drill bit and bushing increases
Solution Approach 1:
The guide-sleeve acts as an intermediary component between the drill bit shank and the bushing. It provides a precise fitting surface that guides the drill bit into correct alignment with the bushing's central axis, preventing direct contact between the drill bit and bushing while ensuring accurate positioning.
Solution Approach 2:
The patent specifies precise dimensional parameters for the guide-sleeve, with an inner diameter that is 0.03-0.06mm greater than the drill bit shank diameter. This controlled parameter difference creates optimal clearance that prevents contact with the bushing while maintaining stable guidance and alignment throughout the drilling operation.
2Reliability
If the guide-sleeve is made rigid to improve stability and reduce wobbling, then reliability is improved, but the complexity of the device increases
Solution Approach 1:
The guiding system is segmented into distinct functional components: the guide-sleeve attached to the handpiece, the bushing integrated into the surgical guide, and the drill bit. This segmentation allows each component to be optimized independently - the guide-sleeve provides rigid guidance while the bushing provides stable positioning, reducing overall system complexity.
Solution Approach 2:
The guide-sleeve serves multiple functions simultaneously: it provides rigid mechanical guidance to prevent drill bit deviation, acts as a connector between the handpiece and drill bit, defines the central longitudinal axis for alignment, and prevents direct contact between the drill bit and bushing. This multi-functionality reduces the need for additional components.
3Manufacturing precision
If the guide-sleeve inner diameter is precisely controlled to be 0.03-0.06mm greater than the drill bit shank diameter to improve alignment, then manufacturing precision is improved, but the ease of manufacture decreases
Solution Approach 1:
The patent establishes a specific parameter range (0.03-0.06mm clearance) that balances manufacturing feasibility with functional performance. This controlled clearance is large enough to accommodate normal manufacturing variations and assembly tolerances, making production more accessible, while remaining small enough to provide stable guidance and prevent drill bit contact with the bushing.
Data Source
AI summary
Apparatus is provided for use with a dental handpiece, an oral surgical guide, and a bushing disposed in the oral surgical guide. The apparatus includes a drill bit having, a shank and a rigid guide-sleeve. A proximal end of the guide-sleeve couples to the dental handpiece, such that a lumen of the guide-sleeve and a drill bit coupled to the dental handpiece are coaxial along a central longitudinal axis of the drill bit. An inner diameter of the guide-sleeve is 0.03-0.06 mm greater than a diameter of the shank. The distal end of the guide-sleeve is slidably couplable with the bushing, such that upon the guide-sleeve being advanced into the bushing the dental handpiece is forced to align the axis of the drill bit to be coaxial with a central longitudinal axis of the bushing. Other applications are also described.