Angled Dental Milling Tool for Precision Screw Seat Machining
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Solution Overview
Problem
Current milling tools are inadequate for precision machining of angled dental structures with direct-to-implant connections, as they oversize the channel and seat of the screw, affecting aesthetics and structural integrity, and are unable to handle varying screw angles effectively.
Innovation Solution
A milling tool with a support area and a cutting element featuring multiple inclined cutting tabs and surfaces, allowing for precise machining of the screw seat and straight channel in angled dental structures, enabling the creation of structures with diverse angles and minimizing the channel's entrance diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single milling cutter is used to machine both the angled channel and the screw seat, then the channel continuity is achieved, but the channel orifice becomes oversized and aesthetics are compromised
Solution Approach 1:
The patent divides the machining function into two separate tools: a first milling cutter for creating the straight channel with precise diameter control, and a second milling cutter for creating the angled channel and screw seat. This segmentation allows each tool to be optimized for its specific function, preventing the oversizing problem that occurs when a single tool is used for both operations.
2Adaptability or versatility
If a single milling cutter is used for both channel and screw seat, then machining continuity is achieved, but the ability to handle varying screw angles is limited
Solution Approach 1:
The patent employs a second milling cutter with an adjustable inclination angle that can be adapted to match different screw angles. This dynamic adjustment capability allows the tool to handle varying screw angles effectively, providing the necessary versatility while maintaining precise control over the angled channel and screw seat geometry.
3Ease of manufacture
If the same tool machines the angled channel and screw seat, then the process is simplified, but the structural behavior and aesthetics are adversely affected
Solution Approach 1:
By separating the machining operations into two distinct steps with specialized tools, the patent ensures that the channel diameter is precisely controlled and not oversized. This segmentation, while adding a step to the process, guarantees superior structural behavior and aesthetics by preventing the adverse effects of an oversized channel orifice.
4Manufacturing precision
If a conventional milling tool is used, then the tool structure is simple, but the machining quality of both channel diameter and screw seat is insufficient
Solution Approach 1:
The patent applies local quality by designing each milling cutter with specific geometric characteristics optimized for its particular function. The first cutter has parameters optimized for straight channel machining, while the second cutter has adjustable inclination and specific geometry for angled channel and screw seat machining. This localized optimization ensures high machining quality for each feature without requiring excessive complexity in either tool.
Data Source
Figure 1a~1c
Figure 2a~2b
Figure 3a~3b
AI summary
Milling tool of a dental structure, used for milling the seat of the screw and the inner diameter of the straight channel of angled dental structures screwed with a direct connection to a dental implant.