Hybrid Ceramic Prosthesis for Primary Teeth
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Solution Overview
Problem
Existing dental crowns, particularly those for primary teeth, face challenges in aesthetics and functional limitations, such as color mismatch and high opacity, while requiring significant tooth removal for installation, which burdens young patients and complicates dental procedures.
Innovation Solution
A hybrid ceramic prosthesis comprising a thermoplastic polymer matrix, like polyphenylsulfone (PPSU), combined with ceramic particles and a white pigment, offering aesthetic similarity and transmittance to natural teeth, along with snap-fit fastening for minimal tooth erosion and quick application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If Zirconia crowns are used to achieve high strength and color similarity to natural teeth, then strength and aesthetic color are improved, but transmittance decreases making the crown more opaque and requiring large tooth removal
Solution Approach 1:
The invention uses a composite material consisting of a thermoplastic polymer matrix combined with ceramic particles. This composite structure allows the crown to achieve both the strength of ceramic materials and the light transmittance of polymer materials, resolving the contradiction between strength and aesthetics. The polymer matrix provides flexibility and light transmission while ceramic particles provide strength and color matching.
Solution Approach 2:
The invention changes the material parameters by selecting specific thermoplastic polymers with appropriate mechanical properties and optical characteristics. By adjusting the polymer matrix composition and ceramic particle content, the crown achieves optimal balance between strength, transmittance, and color matching to natural teeth.
2Strength
If Zirconia crowns with high strength are applied to tooth cavities, then crown strength is improved, but a large amount of tooth removal is required which burdens young patients
Solution Approach 1:
The hybrid ceramic prosthesis combines thermoplastic polymer and ceramic particles to create a material with sufficient strength that requires minimal tooth preparation. The polymer-ceramic composite provides adequate mechanical strength without needing extensive tooth removal, thereby reducing the burden on young patients.
Solution Approach 2:
The thermoplastic polymer matrix provides flexibility to the crown structure, allowing it to be fitted with minimal tooth removal. The flexible nature of the polymer enables the crown to adapt to the prepared tooth structure without requiring excessive reduction of the natural tooth.
3Reliability
If stainless steel crowns are used for primary teeth, then chemical stability and cost are improved, but aesthetic appearance deteriorates due to color difference with surrounding teeth
Solution Approach 1:
The hybrid ceramic prosthesis combines thermoplastic polymer with ceramic particles to achieve both chemical stability and aesthetic appearance. The ceramic particles provide color matching with natural teeth while the polymer matrix ensures chemical stability and biocompatibility, resolving the contradiction between reliability and aesthetics.
Solution Approach 2:
The invention uses ceramic particles and pigments within the polymer matrix to match the color and appearance of natural primary teeth. This allows the crown to blend aesthetically with surrounding teeth while maintaining the chemical stability of the polymer-ceramic composite material.
4Illumination intensity
If resin-veneered stainless steel crowns or composite strip crowns are used, then aesthetic appearance is improved, but functional limitations and structural complexity increase
Solution Approach 1:
The hybrid ceramic prosthesis uses a single-phase composite material (thermoplastic polymer with ceramic particles) that combines aesthetic appearance with functional strength. This eliminates the need for multi-layer structures like resin-veneered crowns, simplifying the overall structure while maintaining both aesthetics and function.
Data Source
AI summary
Proposed is a hybrid ceramic prosthesis. Since the prosthesis is made of a novel hybrid ceramic material, the prothesis has a similar color and transmittance to natural teeth, minimizes tooth removal during preparation for placement of the prothesis, is securely attached to the target tooth by snap-fit fastening to prevent detachment of the prothesis and re-treatment caused by the prothesis detachment, and can be more conveniently applied to the patient than conventional prostheses, enabling an one-day-one-stop dental procedure, thereby reducing burden to patients. The prothesis is useful as a primary crown.