3D-Printable Artificial Tooth Resin for Strength and Tooth Compatibility
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Solution Overview
Problem
Existing artificial teeth materials, such as metal crowns and zirconia, either lack aesthetic appeal or are prone to breakage under occlusal pressure, and existing zirconia-based techniques focus solely on cosmetics without addressing mechanical strength issues.
Innovation Solution
A composition comprising specific photocurable compounds, acrylic resin, photoinitiator, antioxidant, and pigments, which are 3D-printable and UV-curable, forming artificial teeth with high flexural strength and elasticity, ensuring they do not harm natural teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If zirconia is used to create artificial teeth with high tensile strength, then the strength is improved, but the natural teeth may be fractured or shattered due to occlusal pressure
Solution Approach 1:
The patent changes the material parameters by using a resin-based composition with specific photocurable compounds instead of zirconia, achieving a balance between strength and compatibility with natural teeth. The composition includes 100 parts by weight of first photocurable compound, 5-20 parts by weight of second photocurable compound, 25-50 parts by weight of third photocurable compound, and 1-10 parts by weight of fourth photocurable compound, which provides optimal mechanical properties without excessive strength that could damage natural teeth.
Solution Approach 2:
The patent employs a composite resin material combining multiple photocurable compounds with different properties. This composite approach allows the artificial tooth to have sufficient strength for function while maintaining compatibility with natural teeth, avoiding the harmful effect of overly strong materials like zirconia that could fracture natural teeth under occlusal pressure.
2Shape
If porcelain is used in PFM crowns to achieve aesthetic appearance, then the aesthetics are improved, but the porcelain can split or break under occlusal pressure due to lower tensile strength
Solution Approach 1:
The patent uses a composite resin composition that combines multiple photocurable compounds to achieve both aesthetic appearance and sufficient strength. The composite nature of the material allows it to exhibit properties similar to natural teeth, providing both cosmetic appeal and mechanical durability without the brittleness of porcelain that causes splitting under occlusal pressure.
Solution Approach 2:
The patent changes the material parameters by selecting specific photocurable compounds with appropriate glass transition temperatures and molecular weights. This parameter optimization ensures the resin composition has sufficient tensile strength to resist occlusal pressure while maintaining the aesthetic properties needed for artificial teeth, avoiding the brittleness issue of porcelain.
3Strength
If metal crowns are used to achieve high strength, then the strength is improved, but the aesthetic appeal is lost and production costs increase
Solution Approach 1:
The patent employs a composite resin material that combines multiple photocurable compounds to achieve strength properties comparable to metal while maintaining aesthetic appeal. The composite resin can be color-matched to natural teeth, providing the visual appearance of real teeth, whereas metal crowns inherently lack this aesthetic quality. The composite approach also avoids the high production costs associated with gold crowns.
Solution Approach 2:
The patent changes the material parameters by using resin-based photocurable compounds instead of metal, achieving a balance between strength and aesthetics. The resin composition can be formulated with specific glass transition temperatures and molecular weights to provide sufficient mechanical strength while allowing for aesthetic customization, eliminating the aesthetic deficiency of metal crowns and reducing production costs.
4Shape
If zirconia is used solely for cosmetic purposes, then the aesthetics are improved, but the mechanical strength is insufficient and the teeth are prone to breakage
Solution Approach 1:
The patent uses a composite resin composition combining multiple photocurable compounds to achieve both cosmetic appearance and mechanical strength. The composite nature of the material allows it to exhibit properties similar to natural teeth, providing both cosmetic appeal and mechanical durability, whereas zirconia alone provides only cosmetic benefits with insufficient mechanical strength that leads to breakage.
Solution Approach 2:
The patent optimizes the material parameters by selecting specific photocurable compounds with appropriate glass transition temperatures and molecular weights. This parameter optimization ensures the resin composition has sufficient tensile strength to resist occlusal pressure while maintaining the aesthetic properties needed for artificial teeth, avoiding the insufficient strength issue of zirconia used solely for cosmetics.
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
The solution produces artificial teeth with superior mechanical properties and aesthetics, offering enhanced resistance to breakage and compatibility with natural teeth.
Implementation Method 1
a composition for forming artificial teeth comprising: 100 parts by weight of a first photocurable compound; 5 to 20 parts by weight of a second photocurable compound; 25 to 50 parts by weight of a third photocurable compound; and 1 to 10 parts by weight of a fourth photocurable compound
Data Source
AI summary
A composition for forming artificial teeth, a method for producing artificial teeth, and artificial teeth produced using the technique are disclosed. The disclosed composition for forming artificial teeth includes 100 parts by weight of a first photocurable compound illustrated in Chemical Formula 1 below, 5 to 20 parts by weight of a second photocurable compound represented by Chemical Formula 2 below, 25 to 50 parts by weight of a third photocurable compound depicted by Chemical Formula 3 below, and 1 to 10 parts by weight of a fourth photocurable compound shown by Chemical Formula 4 below.