Optical 3D Modeling Composition with UV-Absorbing Inorganic Particles
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Solution Overview
Problem
Existing optical three-dimensional modeling techniques face challenges in achieving desirable shape accuracy and transparency, especially when inorganic particles are added to enhance mechanical characteristics, such as in dental materials, where the properties of these particles lead to poor shape accuracy due to light scattering.
Innovation Solution
A composition comprising a polymerizable monomer, ultraviolet-absorbing inorganic particles, and a photopolymerization initiator, specifically using (meth)acrylate and (meth)acrylamide monomers, zinc oxide, and surface-treated inorganic particles, which improves shape accuracy and mechanical characteristics while maintaining transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inorganic particles are added to the light-curable resin composition to improve mechanical characteristics, then strength is improved, but shape accuracy deteriorates due to light scattering
Solution Approach 1:
The patent changes the particle size parameter of inorganic particles to 1 µm or smaller, which fundamentally alters the light interaction characteristics. At this size scale, the particles no longer scatter light significantly, thereby maintaining shape accuracy while preserving the mechanical strength enhancement benefit
Solution Approach 2:
The patent creates a composite resin composition containing polymerizable monomers, photopolymerization initiators, and specifically sized inorganic particles (1 µm or smaller). This composite structure enables simultaneous achievement of improved mechanical characteristics and maintained shape accuracy through the synergistic combination of materials with optimized properties
2Manufacturing precision
If the resin composition is optimized for shape accuracy without inorganic particles, then shape accuracy is improved, but mechanical characteristics deteriorate
Solution Approach 1:
The patent develops a composite material system that combines organic resin components with specifically sized inorganic particles (1 µm or smaller). This composite approach allows the material to simultaneously achieve the transparency and shape accuracy of organic resins while gaining the mechanical strength enhancement from inorganic particles, eliminating the need to choose between the two properties
3Strength
If larger inorganic particles are used to enhance strength, then mechanical characteristics are improved, but transparency and shape accuracy worsen due to increased light scattering
Solution Approach 1:
The patent fundamentally changes the particle size parameter from conventional larger sizes to 1 µm or smaller. This parameter change transforms the optical properties of the inorganic particles, reducing light scattering effects and maintaining transparency while still providing mechanical reinforcement. The same parameter change simultaneously improves shape accuracy by reducing light diffusion during curing
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 composition achieves desirable shape accuracy, transparency, and mechanical characteristics, making it suitable for dental applications, with enhanced curability and strength, suitable for producing complex dental prosthetic appliances like crowns and bridges.
Implementation Method 1
a photopolymerization initiator (c)
Implementation Method 2
ultraviolet-absorbing inorganic particle (b)
Data Source
AI summary
The present invention provides a composition for optical three-dimensional modeling that offers desirable shape accuracy in optical three-dimensional modeling, and that provides desirable transparency and mechanical characteristics upon being cured. The present invention relates to a composition for optical three-dimensional modeling comprising a polymerizable monomer (a), an ultraviolet-absorbing inorganic particle (b), and a photopolymerization initiator (c).