Angled Dental Prosthesis Bore Manufacturing
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Solution Overview
Problem
Existing dental prostheses face challenges in achieving easy and efficient screw insertion and removal due to the irregular shapes and dimensions of teeth and bone, often requiring angled installations which complicate the alignment of central longitudinal axes between dental implants and prostheses.
Innovation Solution
A method of manufacturing a dental prosthesis with an angled inner through bore or channel, formed by drilling and milling to create an angled connection area between two holes, ensuring smooth screw rotation and removal by eliminating protruding edges within the inner bore, allowing for varied angles and improved assembly/disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an angled inner through hole is manufactured in the dental prosthesis to accommodate misalignment between implant and prosthesis axes, then the adaptability of the prosthesis installation is improved, but the complexity of the manufacturing process increases due to the need for precise angular drilling and milling operations
Solution Approach 1:
The manufacturing process is segmented into distinct operations: drilling the first hole along the implant axis, drilling the second hole at the required angle, and milling the angled connection area. This segmentation allows each operation to be optimized independently and facilitates quality control at each stage.
Solution Approach 2:
The method performs preliminary actions by first drilling the first hole and establishing its position, then using it as a reference for drilling the second hole at the correct angle. The angled connection area is milled in advance before screw insertion, ensuring proper geometry is prepared beforehand.
2Strength
If protruding edges are present in the angled connection area of the inner bore, then the structural integrity of the prosthesis is improved, but the ease of operation deteriorates due to difficulty in screw insertion and removal
Solution Approach 1:
The milling operation creates a localized smooth surface in the angled connection area where the screw will pass, while the rest of the prosthesis structure maintains its original integrity. This local modification eliminates protruding edges only in the critical path of screw movement.
Solution Approach 2:
The milling process acts as an intermediary operation between drilling the two holes and inserting the screw. It creates a transitional smooth surface that facilitates screw movement through the angled connection area without compromising the overall structural integrity.
3Manufacturing precision
If traditional drilling and milling methods are used to create the angled inner through hole, then the manufacturing precision can be maintained, but the productivity decreases due to the time-consuming multi-step process
Solution Approach 1:
The method combines multiple operations (drilling first hole, drilling second hole, milling angled connection area) into a unified manufacturing sequence that can be performed in one setup. This merging reduces the need for multiple fixturing operations and maintains precision while improving efficiency.
Data Source
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AI summary
A dental prosthesis (1) with an angled inner bore (2) is proposed, formed by a first hole (7) and a second hole (26) connected by an angled connection area (29) formed with an angle between 0º and 180º. An outer area (31) and side areas (32) of the angled connection area (29) form an elbow (40) devoid of protruding edges directed towards the interior of the inner bore (2). Said elbow (40) facilitates the insertion and extraction of a screw through the inner bore (2) during the assembly or disassembly of the dental prosthesis (1) on a dental implant. Some methods of manufacturing said dental prosthesis (1) are also proposed.