Dental Prosthesis Framework Veneer Digital Model Integration
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Solution Overview
Problem
Current methods for producing dental prostheses with frameworks and veneers face challenges such as limited adaptability to individual cases, high manufacturing tolerances, and frequent casting defects, leading to inconsistent quality and increased manual effort.
Innovation Solution
A method involving the specification of three-dimensional geometric data for both the framework and veneer, using CAD/CAM technology to generate models and create negative molds, allowing for precise production of veneered dental prostheses with reduced manual intervention and improved adaptability to anatomical shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual application of veneering material is used, then aesthetic quality can be adjusted, but production time increases and quality consistency depends on operator skill
Solution Approach 1:
The patent replaces manual mechanical application of veneering material with a computer-controlled deposition system. The system uses automated robotic arms or deposition mechanisms guided by 3D digital models to apply veneering material precisely, eliminating dependence on operator skill while maintaining aesthetic quality and reducing production time.
Solution Approach 2:
The invention changes the parameters of the veneering process from manual control to computer-controlled parameter management. Digital 3D models define precise parameters for veneer thickness, contour, and placement, allowing consistent reproduction of high-quality results while reducing production time through automation.
2Productivity
If standardized framework and veneer components are used, then production efficiency increases, but adaptability to individual cases decreases
Solution Approach 1:
The patent creates digital 3D models and virtual prototypes of frameworks and veneers before actual production. This preliminary digital design phase allows customization for individual cases to be planned in advance, enabling efficient production of customized components without sacrificing adaptability. The digital models serve as preliminary blueprints that guide precise manufacturing.
Solution Approach 2:
The invention uses digital 3D copying and replication of anatomical structures. Scans of individual patient anatomy are copied into digital models, which can then be precisely replicated in the framework and veneer design. This allows standardized production processes to be applied to customized digital copies, maintaining both efficiency and adaptability.
3Manufacturing precision
If machining is used to adapt framework and veneer to one another, then precision fit is achieved, but manufacturing tolerances must be very small requiring high effort
Solution Approach 1:
The patent replaces traditional mechanical machining and fitting processes with computer-controlled additive manufacturing and digital design integration. The framework and veneer are designed with precise digital interfaces that automatically ensure proper fit, eliminating the need for manual machining and reducing manufacturing effort while maintaining high precision.
Solution Approach 2:
The invention performs preliminary digital fitting and interface design before manufacturing. The 3D digital models allow virtual assembly and tolerance analysis to be completed in advance, ensuring precise fit is built into the design rather than achieved through post-manufacturing adjustment, thereby reducing manufacturing effort.
4Ease of manufacture
If two-component casting mold is used, then framework and veneer can be produced separately, but casting defects occur on contact surfaces requiring extended reworking
Solution Approach 1:
The patent uses digital 3D copying to create precise interface geometries between framework and veneer. The digital model ensures perfect geometric matching at contact surfaces, eliminating the casting defects that occur with physical two-component molds. The contact surface geometry is precisely defined in the digital design phase, ensuring defect-free interfaces.
Solution Approach 2:
The invention replaces physical two-component casting molds with a digital design and additive manufacturing system. This substitution eliminates the interface problems inherent in physical mold assembly, as the digital models ensure perfect geometric compatibility and the additive manufacturing process creates seamless interfaces without casting defects.
Data Source
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AI summary
The invention relates to a method (100, 200, 300) for producing a dental prosthesis (17) with a framework (3) and a veneer (15), in particular for producing a crown, a bridge, an inlay or an onlay. The invention further relates to a system (40, 50) for producing a dental prosthesis (17) with a framework (3) and a veneer (15) and to a corresponding computer program. To allow the dental prosthesis (17) to be produced in a short time and in uniform quality, irrespective of the skill of the operator, the following steps are provided: definition (110, 210, 310) of three-dimensional geometrical data of the veneer (15), provision (101) or preparation (218, 318) of the framework (3), production (120, 220, 320) of a model (5, 5a, 5b, 5c, 5d) of the veneer (15) on the basis of the three-dimensional geometrical data of the veneer (15), on the framework (3) or separately, formation (124, 224, 324) of a female impression (11) of the veneer (15) by inclusion (126, 226, 326) of the model (5, 5a, 5b, 5c, 5d) between the framework (3) and a shaping material (9), and then removal (128, 228, 328) of the model (5, 5a, 5b, 5c, 5d), and filling (130, 230, 330) of the female impression (11) with veneer material for producing the veneered dental prosthesis (17).