Dental Prosthesis Backing Plate Interface Generation
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Solution Overview
Problem
Existing methods for creating digital models of dental prostheses with back protection plates struggle to ensure both stability and precise positioning, as they often result in undercuts and inadequate matching of the artificial teeth's surface with the jaw, leading to instability and improper fit.
Innovation Solution
A method involving the automatic or manual creation of an interface between the back protection plate and the dental prosthesis model, ensuring a precise match with the jaw's surface, using a digital model of the jaw and dental prosthesis, which includes generating a back plate model that connects the jaw and dental prosthesis surfaces, and revising the dental prosthesis model to incorporate the interface, thereby ensuring stability and accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the backing plate is made thicker to ensure stability, then the stability of the prosthesis is improved, but the complexity of the digital model creation process increases
Solution Approach 1:
The digital model creation process is segmented into distinct steps: generating the initial interface, creating the backing plate model from the interface and jaw surface, and revising the denture model. This segmentation allows each step to be performed systematically, managing complexity while ensuring the backing plate achieves sufficient thickness for stability.
Solution Approach 2:
The interface is generated in advance as a preliminary structure that defines the boundary between the backing plate and the denture. This preliminary interface serves as a foundation for subsequent model creation, allowing the backing plate thickness to be predetermined and ensuring stability before final assembly.
2Manufacturing precision
If the interface is manually drawn to ensure precise positioning, then the manufacturing precision is improved, but the time required for model creation increases
Solution Approach 1:
The system allows the interface to be generated automatically based on digital models of the jaw and denture, eliminating the need for manual drawing. The interface is created through computational algorithms that analyze the digital surfaces and determine optimal positioning, thereby maintaining precision while reducing time investment.
Solution Approach 2:
The manual mechanical process of drawing the interface is replaced with a digital computational process. Software algorithms automatically generate the interface by analyzing digital surface data, substituting manual craftsmanship with automated digital processing to achieve both precision and efficiency.
3Strength
If the backing plate is reinforced towards the jawbone to improve stability, then the strength of the prosthesis is improved, but the complexity of the design process increases
Solution Approach 1:
The backing plate design applies local reinforcement specifically in regions adjacent to the jawbone where additional strength is needed, rather than uniformly thickening the entire plate. This localized approach achieves the required strength while minimizing overall complexity and material usage.
Solution Approach 2:
The reinforcement is achieved by extending the backing plate in the depth dimension towards the jawbone surface, creating a three-dimensional reinforcement structure. This dimensional approach allows the plate to anchor into the jawbone region, providing strength without requiring complex lateral structures.
Data Source
Figure 1~6
AI summary
The invention relates to a method for generating a digital model (6) of a dental replacement part, formed by a dental prosthesis and a prosthesis base having a rear protection plate, and for producing a dental replacement part of this type, wherein: in a digital model (1) of a jawbone to be provided and a digital dental prosthesis model (2) positioned therein, an interface (3) is automatically and/or manually marked in the region of the dental prosthesis model (2); a rear protection plate model (4) is formed by the interface (3), an abutting surface (1') of the digital jawbone model (1) and a region of a surface (2') of the dental prosthesis model (2) joining the surface (1') and the interface (3); a revised dental prosthesis model (5) is formed from the digital dental prosthesis model (2) by adopting the interface (3) as a surface; and the digital model (6) of the dental replacement part is created from the rear protection plate model (4) and the revised dental prosthesis model (5).