Dental Structure Screw Channel Segmentation
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Solution Overview
Problem
Current milling techniques for manufacturing dental structures limit the size of screw channels and restrict the types of screw seats that can be created, often resulting in oversized channels and preventing the use of straight or conical seats, which compromises the structural integrity and aesthetics of dental prostheses.
Innovation Solution
A method involving drilling and machining a dental structure with a first channel aligned with the implant axis and a second channel at an angle, allowing for a stepped channel with varying diameters to accommodate screws with straight or conical heads, minimizing material removal and structural weakening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If current milling techniques are used to create screw channels in dental structures, then the manufacturing process is simple, but the channel diameter becomes oversized and the structural integrity is compromised
Solution Approach 1:
The screw channel is divided into multiple sections with different diameters: a first section with a larger diameter for tool access and a second section with a smaller diameter for the final screw passage. This segmentation allows the milling tool to access the channel while minimizing material removal in the critical screw passage area, thereby maintaining structural integrity.
Solution Approach 2:
The invention introduces a stepped configuration along the longitudinal axis of the channel, creating different radial dimensions at different axial positions. The first section has a larger radial dimension for tool access, while the second section has a smaller radial dimension optimized for the screw, resolving the contradiction between tool access and structural strength.
2Ease of operation
If angled milling is used to create screw channels, then the screw can be inserted, but only conical or hemispherical seats can be created and straight seats are prevented
Solution Approach 1:
The channel is segmented into a first section for tool access and a second section for the screw seat. This segmentation allows the milling tool to approach at an angle for access while creating a straight or conical seat in the second section, enabling multiple seat types beyond just conical or hemispherical.
Solution Approach 2:
Instead of approaching the screw seat directly from the entrance at an angle, the invention mills the seat from the opposite direction or from a different orientation, allowing straight or conical seats to be created even though the entrance channel is angled.
3Ease of manufacture
If a single diameter channel is used for screw passage, then the manufacturing is straightforward, but it cannot accommodate screws with straight or conical heads properly
Solution Approach 1:
The channel is divided into sections with different diameters: a first section with larger diameter for tool access and a second section with smaller, precisely controlled diameter for the screw seat. This segmentation enables precise control over the screw seat dimensions while maintaining manufacturing feasibility.
Data Source
AI summary
A method for manufacturing a dental structure, a dental structure and a dental assembly, formed by a structure screwed on a dental implant relates to a manufacturing method of a dental structure intended to be located and screwed on a previously osseointegrated dental implant, as well as to the structure obtained according to said method and to the dental assembly formed by said structure and implant.