Dental Prosthesis Length Calculation via 3D Data Comparison
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Solution Overview
Problem
Current methods for producing dental prostheses are time- and cost-intensive, involving multiple manual steps and often result in impaired occlusal surfaces and mechanical instability due to occlusal processing, which can lead to roughened or weakened structures.
Innovation Solution
A method using provisional prosthetic teeth with 3D data recording and comparison to determine desired lengths for final teeth, allowing for precise computer-controlled production and minimal post-processing, ensuring the occlusal surfaces remain unimpaired and the mechanical stability is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If occlusal processing is performed on prosthetic teeth to achieve precise fit, then the fit precision is improved, but the mechanical stability and surface quality are deteriorated
Solution Approach 1:
The invention performs preliminary action by determining the desired length of prosthetic teeth before they are permanently integrated into the prosthesis. By calculating the optimal length in advance based on the patient's specific needs and comparing it with the actual length, the system identifies teeth that require shortening and processes them occlusally before final integration, thereby achieving precise fit while maintaining mechanical stability of teeth that do not require processing.
Solution Approach 2:
The invention applies local quality by selectively processing only those prosthetic teeth that require occlusal shortening, rather than processing all teeth uniformly. The system identifies individual teeth needing adjustment and applies occlusal processing only to those specific locations, preserving the original surface quality and mechanical stability of teeth that do not require modification.
2Manufacturing precision
If multiple manual steps are used in prosthesis production, then the precision and quality are improved, but the production time and cost are increased
Solution Approach 1:
The invention replaces manual mechanical steps with automated optical and computational systems. Instead of manual measurement and calculation, the system uses optical scanning to capture tooth geometry, computer algorithms to calculate desired lengths, and automated comparison to identify processing requirements. This substitution maintains high precision while dramatically reducing production time and eliminating manual labor.
Solution Approach 2:
The invention creates digital copies of the patient's oral cavity and the prosthetic teeth through optical scanning. These digital models serve as virtual replicas that can be measured, analyzed, and processed without physical manipulation of the actual teeth during the planning phase, enabling precise determination of desired lengths before any physical processing occurs.
3Productivity
If prefabricated prosthetic teeth are used, then the production efficiency is improved, but the adaptability to individual patient needs is reduced
Solution Approach 1:
The invention enables parameter changes by allowing selective modification of prosthetic teeth parameters (specifically length) after the prefabricated set has been selected. The system calculates the desired length for each tooth based on individual patient anatomy and requirements, then identifies which teeth need occlusal shortening to achieve the optimal fit, thereby adapting standard prefabricated teeth to individual patient needs.
Data Source
AI summary
A method for producing a dental prosthesis, and a dental prosthesis made according to the method, the method having the following chronological steps:a) producing a first, provisional dental prosthesis comprising a prosthetic base and provisional prosthetic teeth having occlusal surfaces, whereby data that indicate at least a 3-dimensional form of the occlusal surfaces are stored or have been stored as data record A,b) after subtractive occlusal processing of at least one of the provisional prosthetic teeth, determining at least the 3-dimensional occlusal surfaces of the processed provisional prosthetic teeth, or determining the 3-dimensional surface of the first dental prosthesis is determined as a whole,c) storing data that indicate at least a form of the 3-dimensional occlusal surfaces as data record B,d) calculating, via a computer comparison of data record B with data record A, differences in the forms of the provisional prosthetic teeth before and after subtractive occlusal processing and, from this, calculating at least desired lengths for final prosthetic teeth, ande) producing said final prosthetic teeth at least with the calculated desired length using a CAM method from virtual models of the final prosthetic teeth, whereby the desired length is set by a basal shortening of the virtual models of the final prosthetic teeth, and the final prosthetic teeth produced in such a manner are firmly connected to the at least one first prosthetic base or at least one second prosthetic base.