Dental Prosthesis Data Record Examination for Undercut Detection
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Solution Overview
Problem
The challenge in manufacturing dental prosthesis parts lies in handling undercuts, which can prevent efficient production using 3-axis milling machines and lead to production inaccuracies, and ensuring mountability on residual tooth portions, particularly due to inherent tooth movability and shape complexities in the oral cavity.
Innovation Solution
A method that examines data records of dental prosthesis parts for producibility and mountability using various manufacturing methods, including 3-axis, 3+1, 4, or 5-axis milling, and simulates relative positions to determine the most cost-effective method, modifies data records to eliminate undercuts, and considers tooth movability and material strength to generate preparation instructions for modification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a 3-axis milling machine is used for manufacturing dental prosthesis parts, then manufacturing cost is reduced, but production capability is limited due to undercuts
Solution Approach 1:
The patent applies preliminary action by examining the data record for undercuts and generating preparation instructions before the actual manufacturing process. The system detects undercut regions in the digital model and creates instructions for manual preparation of these areas, allowing the subsequent 3-axis milling process to proceed without capability limitations. This pre-processing step enables the use of cost-effective 3-axis machines while maintaining the ability to handle complex geometries with undercuts.
2Ease of operation
If manual work is used to grind teeth approximately conically, then mounting simplicity is improved, but assessment accuracy deteriorates due to difficulty in detecting undercuts in the oral cavity
Solution Approach 1:
The patent replaces the mechanical visual assessment process with an automated digital examination system. Instead of relying on manual visual inspection in the difficult-to-access oral cavity, the system uses computer-based analysis of digital impressions and data records to automatically detect undercut regions, evaluate mountability, and generate preparation instructions. This substitution of mechanical inspection with digital analysis significantly improves assessment accuracy while maintaining ease of operation.
3Adaptability or versatility
If shaping tools are used with 3-axis milling machines to manufacture undercuts, then manufacturing capability is improved, but tool complexity increases
Solution Approach 1:
The patent applies the extraction principle by separating the undercut creation function from the milling tool itself. Instead of using complex shaping tools with specialized geometries, the system extracts the undercut preparation step as a separate manual process. The digital examination identifies which areas require undercut preparation, and preparation instructions are generated for manual intervention. This allows the use of simple cylindrical milling tools while still achieving the capability to manufacture parts with undercuts.
Data Source
AI summary
The invention refers to a method, a computer, a computer program and a computer-readable medium, which refer to the examination of data records that are used for manufacturing dental prosthesis parts. The examination may be the producibility by one or several methods, the mountability onto the associated residual tooth portion or the examination as to undercuts.