Dental Prosthesis Base Milling for Precise Bonding Gaps
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Solution Overview
Problem
The manufacturing of prostheses is costly and time-consuming, requiring sophisticated processes that involve extensive manual work and lengthy production times, even with computer assistance.
Innovation Solution
A process that rapidly rough-mills the prosthesis base within 10-40 minutes using a 98.5 mm to 100 mm diameter blank, followed by finish-milling only in areas where the prosthesis base will contact the teeth, reducing manual work and production time, and utilizing different milling tools for roughing and finishing with specific plunging depths and speeds to minimize material removal and enhance adhesive strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional sophisticated manufacturing processes are used for high-quality prostheses, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The manufacturing process is divided into two distinct phases: rough-milling phase and finish-milling phase. The rough-milling step removes the majority of material quickly to create the basic prosthesis shape, while the finish-milling step precisely machines only the occlusal surfaces where teeth will be attached. This segmentation allows each phase to be optimized independently, achieving both high speed and high precision.
Solution Approach 2:
Instead of machining the entire prosthesis base to final dimensions, the process applies excessive material removal in the rough-milling phase and then only performs partial finishing on the critical occlusal surfaces. This approach recognizes that full-surface precision machining is unnecessary and inefficient, as only the tooth-contact areas require high precision.
2Manufacturing precision
If extensive manual work is performed to ensure high prosthesis quality, then manufacturing precision is improved, but device complexity deteriorates
Solution Approach 1:
The rough-milling step intentionally leaves visible tool marks and creates a characteristic surface texture that serves as a built-in indicator of proper process execution. This self-service feature allows operators to quickly verify that the rough-milling phase was completed correctly without requiring complex measurement or inspection procedures, thereby simplifying quality control.
Data Source
AI summary
A method for producing a prosthesis or partial prosthesis based on digital data, using multiple teeth present in a dental arch (14) and a prosthesis base to be produced. The prosthesis base is rough-milled by a milling tool, i.e. is milled in a first step, and the prosthesis base present as a semi-finished product, in particular in regions of the prosthesis base on which the teeth and the prosthesis base abut against each another and/or are to be bonded to each other, is partially milled, i.e. is milled in a second step, by a different milling tool, thereby being brought to a target height which corresponds to the desired bonding gap between the prosthesis base and the tooth or dental arch (14).