3D Printed Dental Prosthesis With Load-Guided Internal Reinforcement
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Solution Overview
Problem
Current methods for producing dental prostheses, especially larger permanent bridges, face challenges in using composite materials due to their physical properties, which are not suitable for stability and cost-effectiveness, despite being easier to work with and cheaper than materials like zirconium oxide or metal.
Innovation Solution
A method utilizing a 3D printer to produce dental prostheses with a computer-aided digital model, incorporating a stress test using finite element methods, and strategically placing reinforcement structures made of composite materials, such as fiber bundles or short-fiber-reinforced composites, to enhance stability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dental composites are used for fabricating permanent bridges, then ease of work and cost are improved, but stability and suitability for permanent bridges deteriorate
Solution Approach 1:
The invention uses fiber-reinforced composite materials where glass fibers are embedded in a composite resin matrix. This creates a hybrid material that combines the ease of manipulation and aesthetics of dental composites with the strength and stability of glass fibers, making it suitable for permanent bridge fabrication.
Solution Approach 2:
The invention applies different material properties to different regions of the dental prosthesis. Glass fiber reinforcement is strategically placed in areas requiring enhanced strength while maintaining the composite material's workability and aesthetic properties in visible areas.
2Reliability
If zirconium oxide or metal is used for permanent dental prostheses, then strength and stability are improved, but cost and ease of work deteriorate
Solution Approach 1:
The invention creates a cost-effective alternative to expensive zirconium oxide and metal by using fiber-reinforced composite materials. The glass fiber reinforcement provides the necessary structural strength while the composite resin matrix maintains workability and reduces overall material cost.
3Strength
If glass fiber reinforcement is added to composite material, then strength is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is divided into sequential steps: first placing the glass fiber reinforcement structure, then applying the composite resin matrix material. This segmentation allows each material to be applied and cured independently, simplifying the overall manufacturing process despite the composite nature of the final product.
Solution Approach 2:
The glass fiber reinforcement structure is prepared and positioned in advance before the composite resin matrix is applied. This preliminary action ensures proper fiber orientation and distribution, simplifying the subsequent resin application and curing processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the production of stable and cost-effective dental prostheses by leveraging 3D printing technology to create prostheses with reinforcement structures, allowing for quick, reliable, and inexpensive production of larger bridge restorations.
Implementation Method 1
the solidification of which takes place in each case by photopolymerization
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a dental prosthesis part production method, wherein: a dental prosthesis part model (2) is generated taking into account a denture model (3); a load analysis of the dental prosthesis part model (2) is carried out; a first reinforcing structure model (4) having a first shape and position is arranged inside the dental prosthesis part model (2) and the dental prosthesis part model (2) is reduced by a volume corresponding to the arranged first reinforcing structure model (4); the reduced dental prosthesis part model (2) is divided into a lower partial volume (6) and an upper partial volume (8); a lower part (10.1) of the dental prosthesis part (10) according to the lower partial volume (6) is produced from a first composite material by means of the 3D printer (9); a first reinforcing structure (11) corresponding to the first reinforcing structure model (4) is arranged on the first part (10.1) of the dental prosthesis part (10); and an upper part (10.3) of the dental prosthesis part (10) according to the upper partial volume (8) is placed, by means of the 3D printer (9) using the first composite material, onto the lower part (10.1) of the dental prosthesis part (10) having the arranged first reinforcing structure (11).